The reason that you get the 404 File Not Found error, is that your path to CSS given as a value to the href attribute is missing context path.

An HTTP request URL contains the following parts:

http://[host]:[port][request-path]?[query-string]

The request path is further composed of the following elements:

• Context path: A concatenation of a forward slash (/) with the context root of the servlet's web application. Example: http://host[:port]/context-root[/url-pattern]

• Servlet path: The path section that corresponds to the component alias that activated this request. This path starts with a forward slash (/).

• Path info: The part of the request path that is not part of the context path or the servlet path.

Read more here.

Solutions

There are several solutions to your problem, here are some of them:

1) Using <c:url> tag from JSTL

In my Java web applications I usually used <c:url> tag from JSTL when defining the path to CSS/JavaScript/image and other static resources. By doing so you can be sure that those resources are referenced always relative to the application context (context path).

If you say, that your CSS is located inside WebContent folder, then this should work:

<link type="text/css" rel="stylesheet" href="<c:url value="/globalCSS.css" />" />

The reason why it works is explained in the "JavaServer Pages™ Standard Tag Library" version 1.2 specification chapter 7.5 (emphasis mine):

7.5 <c:url>
Builds a URL with the proper rewriting rules applied.
...
The URL must be either an absolute URL starting with a scheme (e.g. "http:// server/context/page.jsp") or a relative URL as defined by JSP 1.2 in JSP.2.2.1 "Relative URL Specification". As a consequence, an implementation must prepend the context path to a URL that starts with a slash (e.g. "/page2.jsp") so that such URLs can be properly interpreted by a client browser.

NOTE
Don't forget to use Taglib directive in your JSP to be able to reference JSTL tags. Also see an example JSP page here.

2) Using JSP Expression Language and implicit objects

An alternative solution is using Expression Language (EL) to add application context:

<link type="text/css" rel="stylesheet" href="${pageContext.request.contextPath}/globalCSS.css" />

Here we have retrieved the context path from the request object. And to access the request object we have used the pageContext implicit object.

3) Using <c:set> tag from JSTL

DISCLAIMER
The idea of this solution was taken from here.

To make accessing the context path more compact than in the solution ?2, you can first use the JSTL <c:set> tag, that sets the value of an EL variable or the property of an EL variable in any of the JSP scopes (page, request, session, or application) for later access.

<c:set var="root" value="${pageContext.request.contextPath}"/>
...
<link type="text/css" rel="stylesheet" href="${root}/globalCSS.css" />

IMPORTANT NOTE
By default, in order to set the variable in such manner, the JSP that contains this set tag must be accessed at least once (including in case of setting the value in the application scope using scope attribute, like <c:set var="foo" value="bar" scope="application" />), before using this new variable. For instance, you can have several JSP files where you need this variable. So you must ether a) both set the new variable holding context path in the application scope AND access this JSP first, before using this variable in other JSP files, or b) set this context path holding variable in EVERY JSP file, where you need to access to it.

4) Using ServletContextListener

The more effective way to make accessing the context path more compact is to set a variable that will hold the context path and store it in the application scope using a Listener. This solution is similar to solution ?3, but the benefit is that now the variable holding context path is set right at the start of the web application and is available application wide, no need for additional steps.

We need a class that implements ServletContextListener interface. Here is an example of such class:

package com.example.listener;

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;

@WebListener
public class AppContextListener implements ServletContextListener {

    @Override
    public void contextInitialized(ServletContextEvent event) {
        ServletContext sc = event.getServletContext();
        sc.setAttribute("ctx", sc.getContextPath());
    }

    @Override
    public void contextDestroyed(ServletContextEvent event) {}

}

Now in a JSP we can access this global variable using EL:

<link type="text/css" rel="stylesheet" href="${ctx}/globalCSS.css" />

NOTE
@WebListener annotation is available since Servlet version 3.0. If you use a servlet container or application server that supports older Servlet specifications, remove the @WebServlet annotation and instead configure the listener in the deployment descriptor (web.xml). Here is an example of web.xml file for the container that supports maximum Servlet version 2.5 (other configurations are omitted for the sake of brevity):

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                        http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    version="2.5">
    ...  
    <listener>
        <listener-class>com.example.listener.AppContextListener</listener-class>
    </listener>
    ...
</webapp>

5) Using scriptlets

As suggested by user @gavenkoa you can also use scriptlets like this:

<%= request.getContextPath() %>

For such a small thing it is probably OK, just note that generally the use of scriptlets in JSP is discouraged.

Conclusion

I personally prefer either the first solution (used it in my previous projects most of the time) or the second, as they are most clear, intuitive and unambiguous (IMHO). But you choose whatever suits you most.

Other thoughts

You can deploy your web app as the default application (i.e. in the default root context), so it can be accessed without specifying context path. For more info read the "Update" section here.

I faced similar issue with Spring MVC application. I used < mvc:resources > tag to resolve this issue.

Please find the following link having more details.

http://www.mkyong.com/spring-mvc/spring-mvc-how-to-include-js-or-css-files-in-a-jsp-page/

Got this exception as well.

Environment: Mac with Eclipse running Tomcat from inside Eclipse using Servers view.

For any reason Eclipse does not copy classes folder to WEB-INF. After classes folder was manually copied, everything works fine.

Don't know, or it is Eclipse bug or I missed something.

The class format of JDK8 has changed and thats the reason why Tomcat is not able to compile JSPs. Try to get a newer version of Tomcat.

I recently had the same problem. This is a bug in Tomcat, or rather, JDK 8 has a slightly different class file format than what prior-JDK8 versions had. This causes inconsistency and Tomcat is not able to compile JSPs in JDK8.

See following references:

• Compiling JSPs with JDK 1.8 in Tomcat 8
• compilation succeeds in java7 but fails in java8

Also you could use

${pageContext.request.requestURI}

2019 modern browsers update

This is the approach I'd now recommend with a few caveats:

• A relatively modern browser is required
• If the file is expected to be very large you should likely do something similar to the original approach (iframe and cookie) because some of the below operations could likely consume system memory at least as large as the file being downloaded and/or other interesting CPU side effects.

fetch('https://jsonplaceholder.typicode.com/todos/1')_x000D_
  .then(resp => resp.blob())_x000D_
  .then(blob => {_x000D_
    const url = window.URL.createObjectURL(blob);_x000D_
    const a = document.createElement('a');_x000D_
    a.style.display = 'none';_x000D_
    a.href = url;_x000D_
    // the filename you want_x000D_
    a.download = 'todo-1.json';_x000D_
    document.body.appendChild(a);_x000D_
    a.click();_x000D_
    window.URL.revokeObjectURL(url);_x000D_
    alert('your file has downloaded!'); // or you know, something with better UX..._x000D_
  })_x000D_
  .catch(() => alert('oh no!'));

2012 Original jQuery/iframe/Cookie based approach

Bluish is completely right about this, you can't do it through Ajax because JavaScript cannot save files directly to a user's computer (out of security concerns). Unfortunately pointing the main window's URL at your file download means you have little control over what the user experience is when a file download occurs.

I created jQuery File Download which allows for an "Ajax like" experience with file downloads complete with OnSuccess and OnFailure callbacks to provide for a better user experience. Take a look at my blog post on the common problem that the plugin solves and some ways to use it and also a demo of jQuery File Download in action. Here is the source

Here is a simple use case demo using the plugin source with promises. The demo page includes many other, 'better UX' examples as well.

$.fileDownload('some/file.pdf')
    .done(function () { alert('File download a success!'); })
    .fail(function () { alert('File download failed!'); });

Depending on what browsers you need to support you may be able to use https://github.com/eligrey/FileSaver.js/ which allows more explicit control than the IFRAME method jQuery File Download uses.

BalusC excellent answer covers most of the patterns for web applications.

Some application may require Chain-of-responsibility_pattern

In object-oriented design, the chain-of-responsibility pattern is a design pattern consisting of a source of command objects and a series of processing objects. Each processing object contains logic that defines the types of command objects that it can handle; the rest are passed to the next processing object in the chain.

Use case to use this pattern:

When handler to process a request(command) is unknown and this request can be sent to multiple objects. Generally you set successor to object. If current object can't handle the request or process the request partially and forward the same request to successor object.

Useful SE questions/articles:

Why would I ever use a Chain of Responsibility over a Decorator?

Common usages for chain of responsibility?

chain-of-responsibility-pattern from oodesign

chain_of_responsibility from sourcemaking

You're using JSTL 2.0 right? You don't need to put <c:out/> around all variables. Have you tried something like this?

<c:forEach items="${myParams.items}" var="currentItem" varStatus="stat">
  <c:set var="myVar" value="${myVar}${currentItem}" />
</c:forEach>

Edit: Beaten by the above

In my case this was needed.

Disable submit button on form submit

It works fine in Internet Explorer and Firefox without it, but it did not work in Google Chrome.

The problem is that you are disabling the button before it can actually trigger the submit event.

I try with http servlet and I find this issue when I write duplicated @WebServlet ,I encountered with this issue.After I remove or change @WebServlet value it is working.

1.Class

@WebServlet("/display")
public class MyFirst extends HttpServlet {

2.Class

@WebServlet("/display")
public class MySecond extends HttpServlet {

I faced same exception in eclipse neon version exception is like below

org.apache.jasper.JasperException: Unable to compile class for JSP: 

An error occurred at line: 1 in the generated java file
The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files

Stacktrace:
    org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
    org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
    org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:349)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

I using Apache tomcat 8 of maven plugin and i tried to update that but face same issue.

After i download new external apache tomcat version 8.5.14 and run project using this its will success for me

I hope some one to useful this for resolve above exception

try this

<c:forEach items="${list}" var="map">
    <tr>
        <c:forEach items="${map}" var="entry">

            <td>${entry.value}</td>

        </c:forEach>
    </tr>
</c:forEach>

Why would you want to do this? You shouldn't be executing controller code in the view, and most certainly shouldn't be trying to pull code inside of another servlet into the view either.

Do all of your processing and refactoring of the application first, then just pass off the results to a view. Make the view as dumb as possible and you won't even run into these problems.

If this kind of design is hard for you, try Freemarker or even something like Velocity (although I don't recommend it) to FORCE you to do this. You never have to do this sort of thing ever.

To put it more accurately, the problem you are trying to solve is just a symptom of a greater problem - your architecture/design of your servlets.

I've listed a complete JavaScript for creating an MD5 at the bottom but it's really pointless without a secure connection for several reasons.

If you MD5 the password and store that MD5 in your database then the MD5 is the password. People can tell exactly what's in your database. You've essentially just made the password a longer string but it still isn't secure if that's what you're storing in your database.

If you say, "Well I'll MD5 the MD5" you're missing the point. By looking at the network traffic, or looking in your database, I can spoof your website and send it the MD5. Granted this is a lot harder than just reusing a plain text password but it's still a security hole.

Most of all though you can't salt the hash client side without sending the salt over the 'net unencrypted therefore making the salting pointless. Without a salt or with a known salt I can brute force attack the hash and figure out what the password is.

If you are going to do this kind of thing with unencrypted transmissions you need to use a public key/private key encryption technique. The client encrypts using your public key then you decrypt on your end with your private key then you MD5 the password (using a user unique salt) and store it in your database. Here's a JavaScript GPL public/private key library.

Anyway, here is the JavaScript code to create an MD5 client side (not my code):

/**
*
*  MD5 (Message-Digest Algorithm)
*  http://www.webtoolkit.info/
*
**/

var MD5 = function (string) {

    function RotateLeft(lValue, iShiftBits) {
        return (lValue<<iShiftBits) | (lValue>>>(32-iShiftBits));
    }

    function AddUnsigned(lX,lY) {
        var lX4,lY4,lX8,lY8,lResult;
        lX8 = (lX & 0x80000000);
        lY8 = (lY & 0x80000000);
        lX4 = (lX & 0x40000000);
        lY4 = (lY & 0x40000000);
        lResult = (lX & 0x3FFFFFFF)+(lY & 0x3FFFFFFF);
        if (lX4 & lY4) {
            return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
        }
        if (lX4 | lY4) {
            if (lResult & 0x40000000) {
                return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
            } else {
                return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
            }
        } else {
            return (lResult ^ lX8 ^ lY8);
        }
    }

    function F(x,y,z) { return (x & y) | ((~x) & z); }
    function G(x,y,z) { return (x & z) | (y & (~z)); }
    function H(x,y,z) { return (x ^ y ^ z); }
    function I(x,y,z) { return (y ^ (x | (~z))); }

    function FF(a,b,c,d,x,s,ac) {
        a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
        return AddUnsigned(RotateLeft(a, s), b);
    };

    function GG(a,b,c,d,x,s,ac) {
        a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
        return AddUnsigned(RotateLeft(a, s), b);
    };

    function HH(a,b,c,d,x,s,ac) {
        a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
        return AddUnsigned(RotateLeft(a, s), b);
    };

    function II(a,b,c,d,x,s,ac) {
        a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
        return AddUnsigned(RotateLeft(a, s), b);
    };

    function ConvertToWordArray(string) {
        var lWordCount;
        var lMessageLength = string.length;
        var lNumberOfWords_temp1=lMessageLength + 8;
        var lNumberOfWords_temp2=(lNumberOfWords_temp1-(lNumberOfWords_temp1 % 64))/64;
        var lNumberOfWords = (lNumberOfWords_temp2+1)*16;
        var lWordArray=Array(lNumberOfWords-1);
        var lBytePosition = 0;
        var lByteCount = 0;
        while ( lByteCount < lMessageLength ) {
            lWordCount = (lByteCount-(lByteCount % 4))/4;
            lBytePosition = (lByteCount % 4)*8;
            lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount)<<lBytePosition));
            lByteCount++;
        }
        lWordCount = (lByteCount-(lByteCount % 4))/4;
        lBytePosition = (lByteCount % 4)*8;
        lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80<<lBytePosition);
        lWordArray[lNumberOfWords-2] = lMessageLength<<3;
        lWordArray[lNumberOfWords-1] = lMessageLength>>>29;
        return lWordArray;
    };

    function WordToHex(lValue) {
        var WordToHexValue="",WordToHexValue_temp="",lByte,lCount;
        for (lCount = 0;lCount<=3;lCount++) {
            lByte = (lValue>>>(lCount*8)) & 255;
            WordToHexValue_temp = "0" + lByte.toString(16);
            WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length-2,2);
        }
        return WordToHexValue;
    };

    function Utf8Encode(string) {
        string = string.replace(/\r\n/g,"\n");
        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    };

    var x=Array();
    var k,AA,BB,CC,DD,a,b,c,d;
    var S11=7, S12=12, S13=17, S14=22;
    var S21=5, S22=9 , S23=14, S24=20;
    var S31=4, S32=11, S33=16, S34=23;
    var S41=6, S42=10, S43=15, S44=21;

    string = Utf8Encode(string);

    x = ConvertToWordArray(string);

    a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;

    for (k=0;k<x.length;k+=16) {
        AA=a; BB=b; CC=c; DD=d;
        a=FF(a,b,c,d,x[k+0], S11,0xD76AA478);
        d=FF(d,a,b,c,x[k+1], S12,0xE8C7B756);
        c=FF(c,d,a,b,x[k+2], S13,0x242070DB);
        b=FF(b,c,d,a,x[k+3], S14,0xC1BDCEEE);
        a=FF(a,b,c,d,x[k+4], S11,0xF57C0FAF);
        d=FF(d,a,b,c,x[k+5], S12,0x4787C62A);
        c=FF(c,d,a,b,x[k+6], S13,0xA8304613);
        b=FF(b,c,d,a,x[k+7], S14,0xFD469501);
        a=FF(a,b,c,d,x[k+8], S11,0x698098D8);
        d=FF(d,a,b,c,x[k+9], S12,0x8B44F7AF);
        c=FF(c,d,a,b,x[k+10],S13,0xFFFF5BB1);
        b=FF(b,c,d,a,x[k+11],S14,0x895CD7BE);
        a=FF(a,b,c,d,x[k+12],S11,0x6B901122);
        d=FF(d,a,b,c,x[k+13],S12,0xFD987193);
        c=FF(c,d,a,b,x[k+14],S13,0xA679438E);
        b=FF(b,c,d,a,x[k+15],S14,0x49B40821);
        a=GG(a,b,c,d,x[k+1], S21,0xF61E2562);
        d=GG(d,a,b,c,x[k+6], S22,0xC040B340);
        c=GG(c,d,a,b,x[k+11],S23,0x265E5A51);
        b=GG(b,c,d,a,x[k+0], S24,0xE9B6C7AA);
        a=GG(a,b,c,d,x[k+5], S21,0xD62F105D);
        d=GG(d,a,b,c,x[k+10],S22,0x2441453);
        c=GG(c,d,a,b,x[k+15],S23,0xD8A1E681);
        b=GG(b,c,d,a,x[k+4], S24,0xE7D3FBC8);
        a=GG(a,b,c,d,x[k+9], S21,0x21E1CDE6);
        d=GG(d,a,b,c,x[k+14],S22,0xC33707D6);
        c=GG(c,d,a,b,x[k+3], S23,0xF4D50D87);
        b=GG(b,c,d,a,x[k+8], S24,0x455A14ED);
        a=GG(a,b,c,d,x[k+13],S21,0xA9E3E905);
        d=GG(d,a,b,c,x[k+2], S22,0xFCEFA3F8);
        c=GG(c,d,a,b,x[k+7], S23,0x676F02D9);
        b=GG(b,c,d,a,x[k+12],S24,0x8D2A4C8A);
        a=HH(a,b,c,d,x[k+5], S31,0xFFFA3942);
        d=HH(d,a,b,c,x[k+8], S32,0x8771F681);
        c=HH(c,d,a,b,x[k+11],S33,0x6D9D6122);
        b=HH(b,c,d,a,x[k+14],S34,0xFDE5380C);
        a=HH(a,b,c,d,x[k+1], S31,0xA4BEEA44);
        d=HH(d,a,b,c,x[k+4], S32,0x4BDECFA9);
        c=HH(c,d,a,b,x[k+7], S33,0xF6BB4B60);
        b=HH(b,c,d,a,x[k+10],S34,0xBEBFBC70);
        a=HH(a,b,c,d,x[k+13],S31,0x289B7EC6);
        d=HH(d,a,b,c,x[k+0], S32,0xEAA127FA);
        c=HH(c,d,a,b,x[k+3], S33,0xD4EF3085);
        b=HH(b,c,d,a,x[k+6], S34,0x4881D05);
        a=HH(a,b,c,d,x[k+9], S31,0xD9D4D039);
        d=HH(d,a,b,c,x[k+12],S32,0xE6DB99E5);
        c=HH(c,d,a,b,x[k+15],S33,0x1FA27CF8);
        b=HH(b,c,d,a,x[k+2], S34,0xC4AC5665);
        a=II(a,b,c,d,x[k+0], S41,0xF4292244);
        d=II(d,a,b,c,x[k+7], S42,0x432AFF97);
        c=II(c,d,a,b,x[k+14],S43,0xAB9423A7);
        b=II(b,c,d,a,x[k+5], S44,0xFC93A039);
        a=II(a,b,c,d,x[k+12],S41,0x655B59C3);
        d=II(d,a,b,c,x[k+3], S42,0x8F0CCC92);
        c=II(c,d,a,b,x[k+10],S43,0xFFEFF47D);
        b=II(b,c,d,a,x[k+1], S44,0x85845DD1);
        a=II(a,b,c,d,x[k+8], S41,0x6FA87E4F);
        d=II(d,a,b,c,x[k+15],S42,0xFE2CE6E0);
        c=II(c,d,a,b,x[k+6], S43,0xA3014314);
        b=II(b,c,d,a,x[k+13],S44,0x4E0811A1);
        a=II(a,b,c,d,x[k+4], S41,0xF7537E82);
        d=II(d,a,b,c,x[k+11],S42,0xBD3AF235);
        c=II(c,d,a,b,x[k+2], S43,0x2AD7D2BB);
        b=II(b,c,d,a,x[k+9], S44,0xEB86D391);
        a=AddUnsigned(a,AA);
        b=AddUnsigned(b,BB);
        c=AddUnsigned(c,CC);
        d=AddUnsigned(d,DD);
    }

    var temp = WordToHex(a)+WordToHex(b)+WordToHex(c)+WordToHex(d);

    return temp.toLowerCase();
}

you have already forwarded the response in catch block:

RequestDispatcher dd = request.getRequestDispatcher("error.jsp");

dd.forward(request, response);

so, you can not again call the :

response.sendRedirect("usertaskpage.jsp");

because it is already forwarded (committed).

So what you can do is: keep a string to assign where you need to forward the response.

    String page = "";
    try {

    } catch (Exception e) {
      page = "error.jsp";
    } finally {
      page = "usertaskpage.jsp";
    }

RequestDispatcher dd=request.getRequestDispatcher(page);
dd.forward(request, response);

The reason why you are getting the compilation error is, you are trying to access the session in declaration block (<%! %>) where it is not available. All the implicit objects of jsp are available in service method only. Code of declarative blocks goes outside the service method.

I'd advice you to use EL. It is a simplified approach.

${sessionScope.username} would give you the desired output.

Check out this one, it's open source http://amateras.sourceforge.jp/cgi-bin/fswiki_en/wiki.cgi?page=EclipseHTMLEditor

It seems to me that eclipse doesn't recognize the java ee web api (servlets, el, and so on). If you're using maven and don't want to configure eclipse with a specified server runtime, put the dependecy below in your web project pom:

<dependency>  
    <groupId>javax</groupId>    
    <artifactId>javaee-web-api</artifactId>    
    <version>7.0</version> <!-- Put here the version of your Java EE app, in my case 7.0 -->
    <scope>provided</scope>
</dependency>

When you don't want the user to see the comment use:

<%-- comment --%>

If you don't care / want the user to be able to view source and see the comment you can use:

<!-- comment -->

When in doubt use the JSP comment.

So to get my problem fully resolved I needed to do the following:

<% pageContext.setAttribute("old", Status.OLD); %>

Then I was able to do:

<c:when test="${someModel.status == old}"/>...</c:when>

which worked as expected.

XSS can be prevented in JSP by using JSTL <c:out> tag or fn:escapeXml() EL function when (re)displaying user-controlled input. This includes request parameters, headers, cookies, URL, body, etc. Anything which you extract from the request object. Also the user-controlled input from previous requests which is stored in a database needs to be escaped during redisplaying.

For example:

<p><c:out value="${bean.userControlledValue}"></p>
<p><input name="foo" value="${fn:escapeXml(param.foo)}"></p>

This will escape characters which may malform the rendered HTML such as <, >, ", ' and & into HTML/XML entities such as <, >, ", ' and &.

Note that you don't need to escape them in the Java (Servlet) code, since they are harmless over there. Some may opt to escape them during request processing (as you do in Servlet or Filter) instead of response processing (as you do in JSP), but this way you may risk that the data unnecessarily get double-escaped (e.g. & becomes & instead of & and ultimately the enduser would see & being presented), or that the DB-stored data becomes unportable (e.g. when exporting data to JSON, CSV, XLS, PDF, etc which doesn't require HTML-escaping at all). You'll also lose social control because you don't know anymore what the user has actually filled in. You'd as being a site admin really like to know which users/IPs are trying to perform XSS, so that you can easily track them and take actions accordingly. Escaping during request processing should only and only be used as latest resort when you really need to fix a train wreck of a badly developed legacy web application in the shortest time as possible. Still, you should ultimately rewrite your JSP files to become XSS-safe.

If you'd like to redisplay user-controlled input as HTML wherein you would like to allow only a specific subset of HTML tags like <b>, <i>, <u>, etc, then you need to sanitize the input by a whitelist. You can use a HTML parser like Jsoup for this. But, much better is to introduce a human friendly markup language such as Markdown (also used here on Stack Overflow). Then you can use a Markdown parser like CommonMark for this. It has also builtin HTML sanitizing capabilities. See also Markdown or HTML.

The only concern in the server side with regard to databases is SQL injection prevention. You need to make sure that you never string-concatenate user-controlled input straight in the SQL or JPQL query and that you're using parameterized queries all the way. In JDBC terms, this means that you should use PreparedStatement instead of Statement. In JPA terms, use Query.

An alternative would be to migrate from JSP/Servlet to Java EE's MVC framework JSF. It has builtin XSS (and CSRF!) prevention over all place. See also CSRF, XSS and SQL Injection attack prevention in JSF.

This was caused because of something like this in my case:

<jsp-config>
    <jsp-property-group>
        <url-pattern>*.jsp</url-pattern>
        <include-prelude>/headerfooter/header.jsp</include-prelude>
        <include-coda>/headerfooter/footer.jsp</include-coda>
    </jsp-property-group>
</jsp-config>

The problem was actually I did not have header.jsp in my project. However the error message was still saying index_jsp was not found.

This variable can be set using value="${val1}" inside c:set if you have used jquery in your system.

I had to right-click the build.xml file and choose "run". Only then would the .war file be created.

In the servlet code, with the instruction request.setAttribute("servletName", categoryList), you save your list in the request object, and use the name "servletName" for refering it.
By the way, using then name "servletName" for a list is quite confusing, maybe it's better call it "list" or something similar: request.setAttribute("list", categoryList)
Anyway, suppose you don't change your serlvet code, and store the list using the name "servletName". When you arrive to your JSP, it's necessary to retrieve the list from the request, and for that you just need the request.getAttribute(...) method.

<%  
// retrieve your list from the request, with casting 
ArrayList<Category> list = (ArrayList<Category>) request.getAttribute("servletName");

// print the information about every category of the list
for(Category category : list) {
    out.println(category.getId());
    out.println(category.getName());
    out.println(category.getMainCategoryId());
}
%>

Always check if your java files are in src/main/java and not on some other directory path.

<a href="javaScript:{openPopUp();}"></a>
<form action="actionName">
<div id="divId" style="display:none;">
UsreName:<input type="text" name="userName"/>
</div>
</form>

function openPopUp()
{
  $('#divId').css('display','block');
$('#divId').dialog();
}

FYI - if you are importing a List into a JSP, chances are pretty good that you are violating MVC principles. Take a few hours now to read up on the MVC approach to web app development (including use of taglibs) - do some more googling on the subject, it's fascinating and will definitely help you write better apps.

If you are doing anything more complicated than a single JSP displaying some database results, please consider using a framework like Spring, Grails, etc... It will absolutely take you a bit more effort to get going, but it will save you so much time and effort down the road that I really recommend it. Besides, it's cool stuff :-)

You can have a look at the EL (expression language) description here.

Both your code are correct, but I prefer the second one, as comparing a boolean to true or false is redundant.

For better readibility, you can also use the not operator:

<c:if test="${not theBooleanVariable}">It's false!</c:if>

You mean size() don't you?

#{MyBean.somelist.size()}

works for me (using JBoss Seam which has the Jboss EL extensions)

Simply difference between Forward(ServletRequest request, ServletResponse response) and sendRedirect(String url) is

forward():

1. The forward() method is executed in the server side.
2. The request is transfer to other resource within same server.
3. It does not depend on the client’s request protocol since the forward () method is provided by the servlet container.
4. The request is shared by the target resource.
5. Only one call is consumed in this method.
6. It can be used within server.
7. We cannot see forwarded message, it is transparent.
8. The forward() method is faster than sendRedirect() method.
9. It is declared in RequestDispatcher interface.

sendRedirect():

1. The sendRedirect() method is executed in the client side.
2. The request is transfer to other resource to different server.
3. The sendRedirect() method is provided under HTTP so it can be used only with HTTP clients.
4. New request is created for the destination resource.
5. Two request and response calls are consumed.
6. It can be used within and outside the server.
7. We can see redirected address, it is not transparent.
8. The sendRedirect() method is slower because when new request is created old request object is lost.
9. It is declared in HttpServletResponse.

You can use the RedirectView. Copied from the JavaDoc:

View that redirects to an absolute, context relative, or current request relative URL

Example:

@RequestMapping("/to-be-redirected")
public RedirectView localRedirect() {
    RedirectView redirectView = new RedirectView();
    redirectView.setUrl("http://www.yahoo.com");
    return redirectView;
}

You can also use a ResponseEntity, e.g.

@RequestMapping("/to-be-redirected")
public ResponseEntity<Object> redirectToExternalUrl() throws URISyntaxException {
    URI yahoo = new URI("http://www.yahoo.com");
    HttpHeaders httpHeaders = new HttpHeaders();
    httpHeaders.setLocation(yahoo);
    return new ResponseEntity<>(httpHeaders, HttpStatus.SEE_OTHER);
}

And of course, return redirect:http://www.yahoo.com as mentioned by others.

You need to use the fn:contains() or fn:containsIgnoreCase() function.

<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>

...

 <c:if test="${not fn:containsIgnoreCase(mylist, 'apple')}">
        <p>Doesn't contain 'apple'</p>
    </c:if>

or

<c:if test="${not fn:contains(mylist, 'Apple')}">
            <p>Contains 'Apple'</p>
        </c:if>

Note: This will work like mylist.toString().contains("apple") and if this is not what you are looking for better use a other approach.

Without component or external Library in Tomcat 6 o 7

Enabling Upload in the web.xml file:

http://joseluisbz.wordpress.com/2014/01/17/manually-installing-php-tomcat-and-httpd-lounge/#Enabling%20File%20Uploads.

<servlet>
    <servlet-name>jsp</servlet-name>
    <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
    <multipart-config>
      <max-file-size>3145728</max-file-size>
      <max-request-size>5242880</max-request-size>
    </multipart-config>
    <init-param>
        <param-name>fork</param-name>
        <param-value>false</param-value>
    </init-param>
    <init-param>
        <param-name>xpoweredBy</param-name>
        <param-value>false</param-value>
    </init-param>
    <load-on-startup>3</load-on-startup>
</servlet>

AS YOU CAN SEE:

    <multipart-config>
      <max-file-size>3145728</max-file-size>
      <max-request-size>5242880</max-request-size>
    </multipart-config>

Uploading Files using JSP. Files:

In the html file

<form method="post" enctype="multipart/form-data" name="Form" >

  <input type="file" name="fFoto" id="fFoto" value="" /></td>
  <input type="file" name="fResumen" id="fResumen" value=""/>

In the JSP File or Servlet

    InputStream isFoto = request.getPart("fFoto").getInputStream();
    InputStream isResu = request.getPart("fResumen").getInputStream();
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte buf[] = new byte[8192];
    int qt = 0;
    while ((qt = isResu.read(buf)) != -1) {
      baos.write(buf, 0, qt);
    }
    String sResumen = baos.toString();

Edit your code to servlet requirements, like max-file-size, max-request-size and other options that you can to set...

If you know that you'll want to see all Comments every time you retrieve a Topic then change your field mapping for comments to:

@OneToMany(fetch = FetchType.EAGER, mappedBy = "topic", cascade = CascadeType.ALL)
private Collection<Comment> comments = new LinkedHashSet<Comment>();

Collections are lazy-loaded by default, take a look at this if you want to know more.

Can you check value of i by putting logger or println(). and check with closing db conn at the end. Rest your code looks fine and it should work.

There really seems no way for fooling the <a href= .. into a POST method. However, given that you have access to CSS of a page, this can be substituted by using a form instead.

Unfortunately, the obvious way of just styling the button in CSS as an anchor tag, is not cross-browser compatible, since different browsers treat <button value= ... differently.

Incorrect:

<form action='actbusy.php' method='post'>
  <button type='submit' name='parameter' value='One'>Two</button>
</form>

The above example will be showing 'Two' and transmit 'parameter:One' in FireFox, while it will show 'One' and transmit also 'parameter:One' in IE8.

The way around is to use hidden input field(s) for delivering data and the button just for submitting it.

<form action='actbusy.php' method='post'>
   <input class=hidden name='parameter' value='blaah'>
   <button type='submit' name='delete' value='Delete'>Delete</button>
</form>

Note, that this method has a side effect that besides 'parameter:blaah' it will also deliver 'delete:Delete' as surplus parameters in POST.

You want to keep for a button the value attribute and button label between tags both the same ('Delete' on this case), since (as stated above) some browsers will display one and some display another as a button label.

http://oreilly.com/catalog/javacook/chapter/ch18.html

Search for :

"Problem

You want to process the data from an HTML form in a servlet. "

As I can see, you are comparing the message with the empty string using ==.

Its very hard to write the full code, but I can tell the flow of code - first, create db class & method inide that which will return the connection. second, create a servelet(ex-login.java) & import that db class onto that servlet. third, create instance of imported db class with the help of new operator & call the connection method of that db class. fourth, creaet prepared statement & execute statement & put this code in try catch block for exception handling.Use if-else condition in the try block to navigate your login page based on success or failure.

I hope, it will help you. If any problem, then please revert.

Nikhil Pahariya

You should've kept that DOM ready function

$(function() {
    $("#projectKey").change(function() {
        alert( $('option:selected', this).text() );
    });
});

The document isn't ready if you added the javascript before the elements in the DOM, you have to either use a DOM ready function or add the javascript after the elements, the usual place is right before the </body> tag

if you check only null or empty then you can use the with default option for this: <c:out default="var1 is empty or null." value="${var1}"/>

<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html dir="ltr" lang="en-US">
 <head>
 <meta charset="UTF-8" />
  <title>JSP with the current date</title>
  </head>
 <body>
 <%java.text.DateFormat df = new java.text.SimpleDateFormat("dd/MM/yyyy"); %>
<h1>Current Date: <%= df.format(new java.util.Date()) %> </h1>
</body>
</html>

Output: Current Date: 10/03/2010

JSP (JavaServer Pages)

JSP is a Java view technology running on the server machine which allows you to write template text in client side languages (like HTML, CSS, JavaScript, ect.). JSP supports taglibs, which are backed by pieces of Java code that let you control the page flow or output dynamically. A well-known taglib is JSTL. JSP also supports Expression Language, which can be used to access backend data (via attributes available in the page, request, session and application scopes), mostly in combination with taglibs.

When a JSP is requested for the first time or when the web app starts up, the servlet container will compile it into a class extending HttpServlet and use it during the web app's lifetime. You can find the generated source code in the server's work directory. In for example Tomcat, it's the /work directory. On a JSP request, the servlet container will execute the compiled JSP class and send the generated output (usually just HTML/CSS/JS) through the web server over a network to the client side, which in turn displays it in the web browser.

Servlets

Servlet is a Java application programming interface (API) running on the server machine, which intercepts requests made by the client and generates/sends a response. A well-known example is the HttpServlet which provides methods to hook on HTTP requests using the popular HTTP methods such as GET and POST. You can configure HttpServlets to listen to a certain HTTP URL pattern, which is configurable in web.xml, or more recently with Java EE 6, with @WebServlet annotation.

When a Servlet is first requested or during web app startup, the servlet container will create an instance of it and keep it in memory during the web app's lifetime. The same instance will be reused for every incoming request whose URL matches the servlet's URL pattern. You can access the request data by HttpServletRequest and handle the response by HttpServletResponse. Both objects are available as method arguments inside any of the overridden methods of HttpServlet, such as doGet() and doPost().

JSF (JavaServer Faces)

JSF is a component based MVC framework which is built on top of the Servlet API and provides components via taglibs which can be used in JSP or any other Java based view technology such as Facelets. Facelets is much more suited to JSF than JSP. It namely provides great templating capabilities such as composite components, while JSP basically only offers the <jsp:include> for templating in JSF, so that you're forced to create custom components with raw Java code (which is a bit opaque and a lot of tedious work) when you want to replace a repeated group of components with a single component. Since JSF 2.0, JSP has been deprecated as view technology in favor of Facelets.

Note: JSP itself is NOT deprecated, just the combination of JSF with JSP is deprecated.

Note: JSP has great templating abilities by means of Taglibs, especially the (Tag File) variant. JSP templating in combination with JSF is what is lacking.

As being a MVC (Model-View-Controller) framework, JSF provides the FacesServlet as the sole request-response Controller. It takes all the standard and tedious HTTP request/response work from your hands, such as gathering user input, validating/converting them, putting them in model objects, invoking actions and rendering the response. This way you end up with basically a JSP or Facelets (XHTML) page for View and a JavaBean class as Model. The JSF components are used to bind the view with the model (such as your ASP.NET web control does) and the FacesServlet uses the JSF component tree to do all the work.

Related questions

• What is the main-stream Java alternative to ASP.NET / PHP?
• Java EE web development, what skills do I need?
• How do servlets work? Instantiation, session variables and multithreading
• What is a Javabean and where are they used?
• How to avoid Java code in JSP files?
• What components are MVC in JSF MVC framework?
• What is the need of JSF, when UI can be achieved with JavaScript libraries such as jQuery and AngularJS

I think above examples are correct. but you dont' really need to set

request.setAttribute("selectedDept", selectedDept);

you can reuse that info from JSTL, just do something like this..

<!DOCTYPE html>
<html lang="en">
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<head>
    <script src="../js/jquery-1.8.1.min.js"></script>
</head>
<body>
    <c:set var="authors" value="aaa,bbb,ccc,ddd,eee,fff,ggg" scope="application" />
    <c:out value="Before : ${param.Author}"/>
    <form action="TestSelect.action">
        <label>Author
            <select id="Author" name="Author">
                <c:forEach items="${fn:split(authors, ',')}" var="author">
                    <option value="${author}" ${author == param.Author ? 'selected' : ''}>${author}</option>
                </c:forEach>
            </select>
        </label>
        <button type="submit" value="submit" name="Submit"></button>
        <Br>
        <c:out value="After :   ${param.Author}"/>
    </form>
</body>
</html>

You are doing mistake in "configuration_page.jsp" file. here in this file , function loadXMLDoc() 's line number 2 should be like this:

var config=document.getElementsByName('configselect').value;

because you have declared only the name attribute in your <select> tag. So you should get this element by name.

After correcting this, it will run without any JavaScript error

request.getContextPath()- returns root path of your application, while ../ - returns parent directory of a file.

You use request.getContextPath(), as it will always points to root of your application. If you were to move your jsp file from one directory to another, nothing needs to be changed. Now, consider the second approach. If you were to move your jsp files from one folder to another, you'd have to make changes at every location where you are referring your files.

Also, better approach of using request.getContextPath() will be to set 'request.getContextPath()' in a variable and use that variable for referring your path.

<c:set var="context" value="${pageContext.request.contextPath}" />
<script src="${context}/themes/js/jquery.js"></script>

PS- This is the one reason I can figure out. Don't know if there is any more significance to it.

1.<a href="index.jsp?p=products">Products</a> when user clicks on Products link,you can directly call products.jsp.

I mean u can maintain name of the JSP file same as parameter Value.

<%
 if(request.getParameter("p")!=null)
 { 
   String contextPath="includes/";
   String p = request.getParameter("p");
   p=p+".jsp";
   p=contextPath+p;

%>    

<%@include file="<%=p%>" %>

<% 
 }
%>

or

2.you can maintain external resource file with key,value pairs. like below

products : products.jsp

customer : customers.jsp

you can programatically retrieve the name of JSP file from properies file.

this way you can easily change the name of JSP file

Generally, you cannot send a POST request using sendRedirect() method. You can use RequestDispatcher to forward() requests with parameters within the same web application, same context.

RequestDispatcher dispatcher = servletContext().getRequestDispatcher("test.jsp");
dispatcher.forward(request, response);

The HTTP spec states that all redirects must be in the form of a GET (or HEAD). You can consider encrypting your query string parameters if security is an issue. Another way is you can POST to the target by having a hidden form with method POST and submitting it with javascript when the page is loaded.

This works for me:

<c:forEach var="i" begin="1970" end="2000">
    <option value="${2000-(i-1970)}">${2000-(i-1970)} 
     </option>
</c:forEach>

Use

request.setAttribute("attributeName");

and then

getServletContext().getRequestDispatcher("/file.jsp").forward();

Then it will be accessible in the JSP.

As a side note - in your jsp avoid using java code. Use JSTL.

<%
    String redirectURL = "http://whatever.com/myJSPFile.jsp";
    response.sendRedirect(redirectURL);
%>

You should definitely avoid using <jsp:...> tags. They're relics from the past and should always be avoided now.

Use the JSTL.

Now, wether you use the JSTL or any other tag library, accessing to a bean property needs your bean to have this property. A property is not a private instance variable. It's an information accessible via a public getter (and setter, if the property is writable). To access the questionPaperID property, you thus need to have a

public SomeType getQuestionPaperID() {
    //...
}

method in your bean.

Once you have that, you can display the value of this property using this code :

<c:out value="${Questions.questionPaperID}" />

or, to specifically target the session scoped attributes (in case of conflicts between scopes) :

<c:out value="${sessionScope.Questions.questionPaperID}" />

Finally, I encourage you to name scope attributes as Java variables : starting with a lowercase letter.

I think your issue may be in the url pattern. Changing

<servlet-mapping>
    <servlet-name>Register</servlet-name>
    <url-pattern>/Register</url-pattern>
</servlet-mapping>

and

<form action="/Register" method="post">

may fix your problem

use ${fn:length(companies) > 0} to check the size. This returns a boolean

You can also do something like that:

<error-page>
    <error-code>403</error-code>
    <location>/403.html</location>
</error-page>

<error-page>
    <location>/error.html</location>
</error-page>

For error code 403 it will return the page 403.html, and for any other error code it will return the page error.html.

By Java class, I am assuming you mean a Servlet class as setting session attribute in arbitrary Java class does not make sense.You can do something like this in your servlet's doGet/doPost methods

public void doGet(HttpServletRequest request, HttpServletResponse response) {

    HttpSession session = request.getSession();
    String username = (String)request.getAttribute("un");
    session.setAttribute("UserName", username);
}

The varStatus references to LoopTagStatus which has a getIndex() method.

So:

<c:forEach var="tableEntity" items='${requestScope.tables}' varStatus="outer">
   <c:forEach var="rowEntity" items='${tableEntity.rows}' varStatus="inner">            
        <c:out value="${(outer.index * fn:length(tableEntity.rows)) + inner.index}" />
    </c:forEach>
</c:forEach>

See also:

• Hidden features of JSP/Servlet

If you want to never expire a session use 0 or negative value -1.

<session-config>
    <session-timeout>0</session-timeout>
</session-config>

or mention 1440 it indicates 1440 minutes [24hours * 60 minutes]

<session-config>
  <session-timeout>1440</session-timeout><!-- 24hours -->
</session-config>

Session will be expire after 24hours.

I know that this is an old question, but as I was googling it was the first link in a results. So here is the jsp solution:

<form action="some.jsp">
  <select name="item">
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
  </select>
  <input type="submit" value="Submit">
</form>

in some.jsp

request.getParameter("item");

this line will return the selected option (from the example it is: 1, 2 or 3)

The comparison needs to be evaluated fully inside EL ${ ... }, not outside.

<c:if test="${values.type eq 'object'}">

As to the docs, those ${} things are not JSTL, but EL (Expression Language) which is a whole subject at its own. JSTL (as every other JSP taglib) is just utilizing it. You can find some more EL examples here.

<c:if test="#{bean.booleanValue}" />
<c:if test="#{bean.intValue gt 10}" />
<c:if test="#{bean.objectValue eq null}" />
<c:if test="#{bean.stringValue ne 'someValue'}" />
<c:if test="#{not empty bean.collectionValue}" />
<c:if test="#{not bean.booleanValue and bean.intValue ne 0}" />
<c:if test="#{bean.enumValue eq 'ONE' or bean.enumValue eq 'TWO'}" />

See also:

• Our EL wiki page

By the way, unrelated to the concrete problem, if I guess your intent right, you could also just call Object#getClass() and then Class#getSimpleName() instead of adding a custom getter.

<c:forEach items="${list}" var="value">
    <c:if test="${value['class'].simpleName eq 'Object'}">
        <!-- code here -->
    </c:if>
</c:forEeach>

See also:

• instanceof check in EL expression language

Scenario #1: You accidentially re-deployed from the command line while tomcat was already running.

Short Answer: Stop Tomcat, delete target folder, mvn package, then re-deploy

Scenario #2: request.getRequestDispatcher("MIS_SPELLED_FILE_NAME.jsp")

Short Answer: Check file name spelling, make sure case is correct.

Scenario #3: Class Not Found Exceptions (Answer put here because: Question# 17982240 ) (java.lang.ClassNotFoundException for servlet in tomcat with eclipse ) (was marked as duplicate and directed me here )

Short Answer #3.1: web.xml has wrong package path in servlet-class tag.

Short Answer #3.2: java file has wrong import statement.

Below is further details for Scenario #1:

1: Stop Tomcat

• Option 1: Via CTRL+C in terminal.
• Option 2: (terminal closed while tomcat still running)
• ------------ 2.1: press:Windows+R --> type:"services.msc"
• ------------ 2.2: Find "Apache Tomcat #.# Tomcat#" in Name column of list.
• ------------ 2.3: Right Click --> "stop"

2: Delete the "target" folder. (mvn clean will not help you here)

3: mvn package

4: YOUR_DEPLOYMENT_COMMAND_HERE

(Mine: java -jar target/dependency/webapp-runner.jar --port 5190 target/*.war )

Full Back Story:

Accidentially opened a new git-bash window and tried to deploy a .war file for my heroku project via:

java -jar target/dependency/webapp-runner.jar --port 5190 target/*.war

After a failure to deploy, I realized I had two git-bash windows open, and had not used CTLR+C to stop the previous deployment.

I was met with:

HTTP Status 404 – Not Found Type Status Report

Message /if-student-test.jsp

Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.

Apache Tomcat/8.5.31

Below is further details for Scenario #3:

SCENARIO 3.1: The servlet-class package path is wrong in your web.xml file.

It should MATCH the package statement at top of your java servlet class.

File: my_stuff/MyClass.java:

   package my_stuff;

File: PRJ_ROOT/src/main/webapp/WEB-INF/web.xml

   <servlet-class>
   my_stuff.MyClass
   </servlet-class>

SCENARIO 3.2:

You put the wrong "package" statement at top of your myClass.java file.

For example:

File is in: "/my_stuff" folder

You mistakenly write:

package com.my_stuff

This is tricky because:

1: The maven build (mvn package) will not report any errors here.

2: servlet-class line in web.xml can have CORRECT package path. E.g:

<servlet-class>
my_stuff.MyClass
</servlet-class>

Stack Used: Notepad++ + GitBash + Maven + Heroku Web App Runner + Tomcat9 + Windows10:

You can try this way also,

Html:

<form action="javascript:next()" method="post">
<input type="submit" value=Submit /></form>

Javascript:

      function next(){
        //Location where you want to forward your values
        window.location.href = "http://localhost:8563/And/try1.jsp?dymanicValue=" + values; 
        }

Just noting this here in case anyone else has a similar issue.
If you're directing a request directly to a JSP, using Apache Tomcat web.xml configuration, then ${requestScope.attr} doesn't seem to work, instead ${param.attr} contains the request attribute attr.

I also had an issue displaying charectors like "? U".I added the following to my web.xml.

<jsp-config>
    <jsp-property-group>
        <url-pattern>*.jsp</url-pattern>
        <page-encoding>UTF-8</page-encoding>
    </jsp-property-group>
</jsp-config>

This solved the issue in the pages except header. Tried many ways to solve this and nothing worked in my case. The issue with header was header jsp page is included from another jsp. So gave the encoding to the import and that solved my problem.

<c:import url="/Header1.jsp" charEncoding="UTF-8"/>

Thanks

@skaffman nailed it down. They live each in its own context. However, I wouldn't consider using scriptlets as the solution. You'd like to avoid them. If all you want is to concatenate strings in EL and you discovered that the + operator fails for strings in EL (which is correct), then just do:

<c:out value="abc${test}" />

Or if abc is to obtained from another scoped variable named ${resp}, then do:

<c:out value="${resp}${test}" />

Use EL (JSP Expression Language):

${param.accountID}

Either != or ne will work, but you need to get the accessor syntax and nested quotes sorted out.

<c:if test="${content.contentType.name ne 'MCE'}">
    <%-- snip --%>
</c:if>

Put your css/js files in folder src/main/webapp/resources. Don't put them in WEB-INF or src/main/resources.

Then add this line to spring-dispatcher-servlet.xml

<mvc:resources mapping="/resources/**" location="/resources/" />

Include css/js files in jsp pages

<link href="<c:url value="/resources/style.css" />" rel="stylesheet">

Don't forget to declare taglib in your jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

While you have a return value in checkform, it isn't being used anywhere - try using onclick="return checkform()" instead.

You may want to considering replacing this method with onsubmit="return checkform()" in the form tag instead, though both will work for clicking the button.

The pageContext is an implicit object available in JSPs. The EL documentation says

The context for the JSP page. Provides access to various objects including:
servletContext: ...
session: ...
request: ...
response: ...

Thus this expression will get the current HttpServletRequest object and get the context path for the current request and append /JSPAddress.jsp to it to create a link (that will work even if the context-path this resource is accessed at changes).

The primary purpose of this expression would be to keep your links 'relative' to the application context and insulate them from changes to the application path.

For example, if your JSP (named thisJSP.jsp) is accessed at http://myhost.com/myWebApp/thisJSP.jsp, thecontext path will be myWebApp. Thus, the link href generated will be /myWebApp/JSPAddress.jsp.

If someday, you decide to deploy the JSP on another server with the context-path of corpWebApp, the href generated for the link will automatically change to /corpWebApp/JSPAddress.jsp without any work on your part.

You may try this example:

<form>_x000D_
  <h1>Hello! I'm duke! What's you name?</h1>_x000D_
  <input type="text" name="user">_x000D_
  <br>_x000D_
  <br>_x000D_
  <input type="submit" value="submit">&nbsp;&nbsp;&nbsp;&nbsp;_x000D_
  <input type="reset">_x000D_
</form>_x000D_
<h1>Hello ${param.user}</h1> _x000D_
<!-- its Expression Language -->

another example with just scriplets, when iterating through an ArrayList that contains Maps.

<%   
java.util.List<java.util.Map<String,String>> employees=(java.util.List<java.util.Map<String, String>>)request.getAttribute("employees");    

for (java.util.Map employee: employees) {
%>
<tr>
<td><input value="<%=employee.get("fullName") %>"/></td>    
</tr>
...
<%}%>

I don't believe AJAX can handle file uploads but this can be achieved with libraries that leverage flash. Another advantage of the flash implementation is the ability to do multiple files at once (like gmail).

SWFUpload is a good start : http://www.swfupload.org/documentation

jQuery and some of the other libraries have plugins that leverage SWFUpload. On my last project we used SWFUpload and Java without a problem.

Also helpful and worth looking into is Apache's FileUpload : http://commons.apache.org/fileupload/index.html

Normally you cant update a page from a servlet. Client (browser) has to request an update. Eiter client loads a whole new page or it requests an update to a part of an existing page. This technique is called Ajax.

You can do something like this:

<%

out.print("<p>Hey!</p>");    
out.print("<p>How are you?</p>");

%>

Java script plays on browser where java code is server side thing so you can't simply do this.

What you can do is submit the calculated variable from javascript to server by form-submission, or using URL parameter or using AJAX calls and then you can make it available on server

HTML

<input type="hidden" id="hiddenField"/>

make sure this fields lays under <form>

Javascript

document.getElementById("hiddenField").value=yourCalculatedVariable;

on server you would get this as a part of request

Visit Here to get your required jar files of JSTL.

and to get any of your required jar files visit HERE

1. Make the database connection and retrieve the query result.
2. Traverse through the result and display the query results.

The example code below demonstrates this in detail.

<%@page import="java.sql.*, java.io.*,listresult"%> //import the required library

<%

String label = request.getParameter("label"); // retrieving a variable from a previous page

Connection dbc = null; //Make connection to the database
Class.forName("com.mysql.jdbc.Driver");
dbc = DriverManager.getConnection("jdbc:mysql://localhost:3306/works", "root", "root");
if (dbc != null) 
{
    System.out.println("Connection successful");
}

ResultSet rs = listresult.dbresult.func(dbc, label); //This function is in the end. The function is defined in another package- listresult

%>

<form name="demo form" method="post">

    <table>
        <tr>
            <td>
                Label Name:
            </td>

            <td>
                <input type="text" name="label" value="<%=rs.getString("labelname")%>">
            </td>

            <td>
                <select name="label">
                <option value="">SELECT</option>

                <% while (rs.next()) {%>

                    <option value="<%=rs.getString("lname")%>"><%=rs.getString("lname")%>
                    </option>

                <%}%>
                </select>
            </td>
        </tr>
    </table>

</form>

//The function:

public static ResultSet func(Connection dbc, String x)
{
    ResultSet rs = null;
    String sql;
    PreparedStatement pst;
    try
    {
        sql = "select lname from demo where label like '" + x + "'";
        pst = dbc.prepareStatement(sql);
        rs = pst.executeQuery();
    } 
    catch (Exception e) 
    {
        e.printStackTrace();
        String sqlMessage = e.getMessage();
    }
    return rs;
}

I have tried to make this example as detailed as possible. Do ask if you have any queries.

Simply difference between Forward(ServletRequest request, ServletResponse response) and sendRedirect(String url) is

forward():

1. The forward() method is executed in the server side.
2. The request is transfer to other resource within same server.
3. It does not depend on the client’s request protocol since the forward () method is provided by the servlet container.
4. The request is shared by the target resource.
5. Only one call is consumed in this method.
6. It can be used within server.
7. We cannot see forwarded message, it is transparent.
8. The forward() method is faster than sendRedirect() method.
9. It is declared in RequestDispatcher interface.

sendRedirect():

1. The sendRedirect() method is executed in the client side.
2. The request is transfer to other resource to different server.
3. The sendRedirect() method is provided under HTTP so it can be used only with HTTP clients.
4. New request is created for the destination resource.
5. Two request and response calls are consumed.
6. It can be used within and outside the server.
7. We can see redirected address, it is not transparent.
8. The sendRedirect() method is slower because when new request is created old request object is lost.
9. It is declared in HttpServletResponse.

You have to set the runtime for your web project to the Tomcat installation you are using; you can do it in the "Targeted runtimes" section of the project configuration.

In this way you will allow Eclipse to add Tomcat's Java EE Web Profile jars to the build path.

Remember that the HttpServlet class isn't in a JRE, but at least in an Enterprise Web Profile (e.g. a servlet container runtime /lib folder).

The expression between the <%= %> is evaluated before the c:if tag is evaluated. So, supposing that |request.isUserInRole| returns |true|, your example would be evaluated to this first:

<c:if test="true">
    <li>user</li>
</c:if>

and then the c:if tag would be executed.

There's no need to manually put class files on Tomcat. Just make sure your package declaration for Member is correctly defined as

package pageNumber;

since, that's the only application package you're importing in your JSP.

<%@ page import="pageNumber.*, java.util.*, java.io.*" %>

In js you can change zoom by

document.body.style.zoom="90%"

But it doesn't work in FF http://caniuse.com/#search=zoom

For ff you can try

-moz-transform: scale(0.9);

And check next topic How can I zoom an HTML element in Firefox and Opera?

There is no if-else, just if.

<c:if test="${user.age ge 40}">
 You are over the hill.
</c:if>

Optionally you can use choose-when:

<c:choose>
  <c:when test="${a boolean expr}">
    do something
  </c:when>
  <c:when test="${another boolean expr}">
    do something else
  </c:when>
  <c:otherwise>
    do this when nothing else is true
  </c:otherwise>
</c:choose>

    function gotofirst(){
        window.location = "firstServelet.java";
}
    function gotosecond(){
        window.location = "secondServelet.java";
}

<form action="FirstServlet" method="Post">
    Last Name: <input type="text" name="lastName" size="20">
    <br><br>
    <input type="submit" onclick="gotofirst()" value="FirstServlet">
    <input type="submit" onclick="gotosecond()" value="SecondServlet">
</form>

Older versions of JSP did not support the second syntax.

It works using ajax. The jsp then display in iframe returned by controller in response to request.

function openPage() {
  jQuery.ajax({
  type : 'POST',
  data : jQuery(this).serialize(),
  url : '<%=request.getContextPath()%>/post_action',
  success : function(data, textStatus) {
  jQuery('#iframeId').contents().find('body').append(data);
  },
  error : function(XMLHttpRequest, textStatus, errorThrown) {
  }
  });
}

Thank to Brian for the code. I was trying to connect to the sql server with {call spname(?,?)} and I got errors, but when I change my code to exec sp... it works very well.

I post my code in hope this helps others with problems like mine:

ResultSet rs = null;
PreparedStatement cs=null;
Connection conn=getJNDIConnection();

try {
    cs=conn.prepareStatement("exec sp_name ?,?,?,?,?,?,?");
    cs.setEscapeProcessing(true);
    cs.setQueryTimeout(90);

    cs.setString(1, "valueA");

    cs.setString(2, "valueB");

    cs.setString(3, "0418");

    //commented, because no need to register parameters out!, I got results from the resultset. 
    //cs.registerOutParameter(1, Types.VARCHAR);
    //cs.registerOutParameter(2, Types.VARCHAR);

    rs = cs.executeQuery();
    ArrayList<ObjectX> listaObjectX = new ArrayList<ObjectX>();
    while (rs.next()) {

        ObjectX to = new ObjectX();
        to.setFecha(rs.getString(1));
        to.setRefId(rs.getString(2));
        to.setRefNombre(rs.getString(3));
        to.setUrl(rs.getString(4));

        listaObjectX.add(to);

    }
    return listaObjectX;
     } catch (SQLException se) {
        System.out.println("Error al ejecutar SQL"+ se.getMessage());
        se.printStackTrace();
        throw new IllegalArgumentException("Error al ejecutar SQL: " + se.getMessage());

    } finally {

        try {

            rs.close();
            cs.close();
          con.close();

        } catch (SQLException ex) {
            ex.printStackTrace();
        }
    }

A Spring Boot with Thymeleaf solution could look like:

Lets say my context-path is /app/

In Thymeleaf you can get it via:

<script th:inline="javascript">
    /*<![CDATA[*/
        let contextPath    = /*[[@{/}]]*/
    /*]]>*/
</script>

all you need to do is right click on the jsp page in the browser, which might look like "localhost:8080/images.jpg, copy this and paste it where the image is getting generated

You can use link-rewriting to append a unique identifier to all your URLs when starting at a single page (e.g. index.html/jsp/whatever). The browser will use the same cookies for all your tabs so everything you put in cookies will not be unique.

You concrete problem is caused because you're mixing discouraged and old school scriptlets <% %> with its successor EL ${}. They do not share the same variable scope. The allFestivals is not available in scriptlet scope and the i is not available in EL scope.

You should install JSTL (<-- click the link for instructions) and declare it in top of JSP as follows:

<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>

and then iterate over the list as follows:

<c:forEach items="${allFestivals}" var="festival">
    <tr>      
        <td>${festival.festivalName}</td>
        <td>${festival.location}</td>
        <td>${festival.startDate}</td>
        <td>${festival.endDate}</td>
        <td>${festival.URL}</td>  
    </tr>
</c:forEach>

(beware of possible XSS attack holes, use <c:out> accordingly)

Don't forget to remove the <jsp:useBean> as it has no utter value here when you're using a servlet as model-and-view controller. It would only lead to confusion. See also our servlets wiki page. Further you would do yourself a favour to disable scriptlets by the following entry in web.xml so that you won't accidently use them:

<jsp-config>
    <jsp-property-group>
        <url-pattern>*.jsp</url-pattern>
        <scripting-invalid>true</scripting-invalid>
    </jsp-property-group>
</jsp-config>

According to: Java Revisited

1. Resources included by include directive are loaded during jsp translation time, while resources included by include action are loaded during request time.

2. Any change on included resources will not be visible in case of include directive until jsp file compiles again. While in case of include action, any change in included resource will be visible in the next request.

3. Include directive is static import, while include action is dynamic import.

4. Include directive uses file attribute to specify resources to be included while include action uses page attribute for the same purpose.

Suppose we want to pass three values(u1,u2,u3) from say 'show.jsp' to another page say 'display.jsp' Make three hidden text boxes and a button that is click automatically(using javascript). //Code to written in 'show.jsp'

<body>
<form action="display.jsp" method="post">
 <input type="hidden" name="u1" value="<%=u1%>"/>
 <input type="hidden" name="u2" value="<%=u2%>" />
 <input type="hidden" name="u3" value="<%=u3%>" />
 <button type="hidden" id="qq" value="Login" style="display: none;"></button>
</form>
  <script type="text/javascript">
     document.getElementById("qq").click();
  </script>
</body>

// Code to be written in 'display.jsp'

 <% String u1 = request.getParameter("u1").toString();
    String u2 = request.getParameter("u2").toString();
    String u3 = request.getParameter("u3").toString();
 %>

If you want to use these variables of servlets in javascript then simply write

<script type="text/javascript">
 var a=<%=u1%>;
</script>

Hope it helps :)

Look at the HttpServletResponse#sendRedirect(String location) method.

Use it as:

response.sendRedirect(request.getContextPath() + "/welcome.jsp")

Alternatively, look at HttpServletResponse#setHeader(String name, String value) method.

The redirection is set by adding the location header:

response.setHeader("Location", request.getContextPath() + "/welcome.jsp");

Either use window.onload this way

<script>
    window.onload = function() {
        // ...
    }
</script>

or alternatively

<script>
    window.onload = functionName;
</script>

(yes, without the parentheses)

Or just put the script at the very bottom of page, right before </body>. At that point, all HTML DOM elements are ready to be accessed by document functions.

<body>
    ...

    <script>
        functionName();
    </script>
</body>

I got the same error by using response.getWriter() before a request.getRequestDispatcher(path).forward(request, response);. So start works fine when I replace it by response.getOutputStream()

EL interprets ${class.name} as described - the name becomes getName() on the assumption you are using explicit or implicit methods of generating getter/setters

You can override this behavior by explicitly identifying the name as a function: ${class.name()} This calls the function name() directly without modification.

If you want direct link:

https://github.com/spring-projects/spring-framework/blob/master/spring-webmvc/src/main/resources/META-INF/spring-form.tld

Or from repos:

JCenter : link

Maven Central : link

And if you need as Gradle dependency:

compile 'org.springframework:spring-webmvc:4.1.6.RELEASE

More information about spring-form: http://docs.spring.io/spring/docs/current/spring-framework-reference/html/spring-form.tld.html

There's a huge difference. As has been mentioned, <%@ include is a static include, <jsp:include is a dynamic include. Think of it as a difference between a macro and a function call (if you are familiar with those terms). Another way of putting it, a static include is exactly the same thing as copy-pasting the exact content of the included file (the "code") at the location of the <%@ include statement (which is exactly what the JSP compiler will do.

A dynamic include will make a request (using the request dispatcher) that will execute the indicated page and then include the output from the page in the output of the calling page, in place of the <jsp:include statement.

The big difference here is that with a dynamic include, the included page will execute in it's own pageContext. And since it's a request, you can send parameters to the page the same way you can send parameters along with any other request. A static include, on the other hand, is just a piece of code that will execute inside the context of the calling page. If you statically include the same file more than once, the code in that file will exist in multiple locations on the calling page so something like

<%
int i = 0;
%>

would generate a compiler error (since the same variable can't be declared more than once).

from the sourcecode at http://mozilla.github.com/pdf.js/build/pdf.js

/**
 * This is the main entry point for loading a PDF and interacting with it.
 * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
 * is used, which means it must follow the same origin rules that any XHR does
 * e.g. No cross domain requests without CORS.
 *
 * @param {string|TypedAray|object} source Can be an url to where a PDF is
 * located, a typed array (Uint8Array) already populated with data or
 * and parameter object with the following possible fields:
 *  - url   - The URL of the PDF.
 *  - data  - A typed array with PDF data.
 *  - httpHeaders - Basic authentication headers.
 *  - password - For decrypting password-protected PDFs.
 *
 * @return {Promise} A promise that is resolved with {PDFDocumentProxy} object.
 */

So a standard XMLHttpRequest(XHR) is used for retrieving the document. The Problem with this is that XMLHttpRequests do not support data: uris (eg. data:application/pdf;base64,JVBERi0xLjUK...).

But there is the possibility of passing a typed Javascript Array to the function. The only thing you need to do is to convert the base64 string to a Uint8Array. You can use this function found at https://gist.github.com/1032746

var BASE64_MARKER = ';base64,';

function convertDataURIToBinary(dataURI) {
  var base64Index = dataURI.indexOf(BASE64_MARKER) + BASE64_MARKER.length;
  var base64 = dataURI.substring(base64Index);
  var raw = window.atob(base64);
  var rawLength = raw.length;
  var array = new Uint8Array(new ArrayBuffer(rawLength));

  for(var i = 0; i < rawLength; i++) {
    array[i] = raw.charCodeAt(i);
  }
  return array;
}

tl;dr

var pdfAsDataUri = "data:application/pdf;base64,JVBERi0xLjUK..."; // shortened
var pdfAsArray = convertDataURIToBinary(pdfAsDataUri);
PDFJS.getDocument(pdfAsArray)

It's really simple, just download the latest toolkit from Codeplex and add the extracted AjaxControlToolkit.dll to your toolbox in Visual Studio by right clicking the toolbox and selecting 'choose items'. You will then have the controls in your Visual STudio toolbox and using them is just a matter of dragging and dropping them onto your form, of course don't forget to add a asp:ScriptManager to every page that uses controls from the toolkit, or optionally include it in your master page only and your content pages will inherit the script manager.

SELECT *
  FROM (SELECT   table_name, COUNT (*) cnt
            FROM all_tab_columns
           WHERE owner IN ('OWNER_A')
        GROUP BY table_name) x,
       (SELECT   table_name, COUNT (*) cnt
            FROM all_tab_columns
           WHERE owner IN ('OWNER_B')
        GROUP BY table_name) y
 WHERE x.table_name = y.table_name AND x.cnt <> y.cnt;

SELECT 
    a.nameA, /* TableA.nameA */
    d.nameD /* TableD.nameD */
FROM TableA a 
    INNER JOIN TableB b on b.aID = a.aID 
    INNER JOIN TableC c on c.cID = b.cID 
    INNER JOIN TableD d on d.dID = a.dID 
WHERE DATE(c.`date`) = CURDATE()

If you are not wanting to use images, and want it to look exactly like the Rounded Rect style, try this. Just place a UIView over the UIButton, with an identical frame and auto resize mask, set the alpha to 0.3, and set the background to a color. Then use the snippet below to clip the rounded edges off the colored overlay view. Also, uncheck the 'User Interaction Enabled' checkbox in IB on the UIView to allow touch events to cascade down to the UIButton underneath.

One side effect is that your text will also be colorized.

#import <QuartzCore/QuartzCore.h>

colorizeOverlayView.layer.cornerRadius = 10.0f;
colorizeOverlayView.layer.masksToBounds = YES;

Use the Application Verifier (AppVerifier) tool from Microsoft.

In my case I need to simulate memory no longer being available so I did the following in the tool:

1. Added my application
2. Unchecked Basic
3. Checked Low Resource Simulation
   • Changed TimeOut to 120000 - my application will run normally for 2 minutes before anything goes into effect.
   • Changed HeapAlloc to 100 - 100% chance of heap allocation error
   • Set Stacks to true - the stack will not be able to grow any larger
4. Save
5. Start my application

After 2 minutes my program could no longer allocate new memory and I was able to see how everything was handled.

In a nutshell, "fork" creates a copy of the project hosted on your own GitHub account.

"Clone" uses git software on your computer to download the source code and it's entire version history unto that computer

You could use the :first-child and :last-child pseudo-selectors:

tr td:first-child,
tr td:last-child {
    /* styles */
}

This should work in all major browsers, but IE7 has some problems when elements are added dynamically (and it won't work in IE6).

Yes you can. You can even test it:

var i = 0;_x000D_
var timer = setInterval(function() {_x000D_
  console.log(++i);_x000D_
  if (i === 5) clearInterval(timer);_x000D_
  console.log('post-interval'); //this will still run after clearing_x000D_
}, 200);

In this example, this timer clears when i reaches 5.

for(int i = 0; i < array.length; i++)
{
    System.out.println(array[i]);
}

or

for(String value : array)
{
    System.out.println(value);
}

The second version is a "for-each" loop and it works with arrays and Collections. Most loops can be done with the for-each loop because you probably don't care about the actual index. If you do care about the actual index us the first version.

Just for completeness you can do the while loop this way:

int index = 0;

while(index < myArray.length)
{
  final String value;

  value = myArray[index];
  System.out.println(value);
  index++;
}

But you should use a for loop instead of a while loop when you know the size (and even with a variable length array you know the size... it is just different each time).

These solutions Failed in my case with Relative Layout and If KeyBoard is Open android:scrollbars="none" & android:scrollbarStyle="insideOverlay" also not working.

toolbar is gone, my done button is gone.

This one is Working for me

myScrollView.setVerticalScrollBarEnabled(false);

There are absolutely very good reason to want the last key of an OrderedDict. I use an ordered dict to list my users when I edit them. I am using AJAX calls to update user permissions and to add new users. Since the AJAX fires when a permission is checked, I want my new user to stay in the same position in the displayed list (last) for convenience until I reload the page. Each time the script runs, it re-orders the user dictionary.

That's all good, why need the last entry? So that when I'm writing unit tests for my software, I would like to confirm that the user remains in the last position until the page is reloaded.

dict.keys()[-1]

Performs this function perfectly (Python 2.7).

Turn it around by doing:

<style type="text/css">
  #middlecol {
    border-right: 2px solid red;
    width: 45%;
  }

  #middlecol table {
    max-width: 400px;
    width: 100% !important;
  }
</style>

Also I would advise you to:

• Not use the center tag (it's deprecated)
• Don't use width, bgcolor attributes, set them by CSS (width and background-color)

(assuming that you can control the table that was rendered)

Amazon provides a policy generator tool:

https://awspolicygen.s3.amazonaws.com/policygen.html

After that, you can enter the policy requirements for the bucket on the AWS console:

https://console.aws.amazon.com/s3/home

I resolved this problem by navigating to C:\Python27\Scripts folder and then run file.py file instead of C:\Python27 folder

Here is what I did.

set ulimit -n 32000 in the file /etc/init.d/docker

and restart the docker service

docker run -ti node:latest /bin/bash

run this command to verify

user@4d04d06d5022:/# ulimit -a

should see this in the result

open files (-n) 32000

[user@ip ec2-user]# docker run -ti node /bin/bash
user@4d04d06d5022:/# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 58729
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 32000
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 58729
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

I use the following alternative to get default/optional params and "kind-of-overloaded" constructors with variable number of params:

private x?: number;
private y?: number;

constructor({x = 10, y}: {x?: number, y?: number}) {
 this.x = x;
 this.y = y;
}

I know it's not the prettiest code ever, but one gets used to it. No need for the additional Interface and it allows private members, which is not possible when using the Interface.

May be this will be usefull for u: ReGExp on-line editor

The best solution I found is to delete this file: workspace/.metadata/.plugins/org.eclipse.e4.workbench/workbench

Edit the application tag in manifest file.

 <application
    android:icon="@drawable/app_icon"
    android:label="@string/app_name"
    android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" >

Change the label attribute and give the latest name over there.

In First activity:

ArrayList<ContactBean> fileList = new ArrayList<ContactBean>();
Intent intent = new Intent(MainActivity.this, secondActivity.class);
intent.putExtra("FILES_TO_SEND", fileList);
startActivity(intent);

In receiver activity:

ArrayList<ContactBean> filelist =  (ArrayList<ContactBean>)getIntent().getSerializableExtra("FILES_TO_SEND");`

This works in Oracle:

insert into pager (PAG_ID,PAG_PARENT,PAG_NAME,PAG_ACTIVE)
          select 8000,0,'Multi 8000',1 from dual
union all select 8001,0,'Multi 8001',1 from dual

The thing to remember here is to use the from dual statement.

System.Windows.Forms.Control.MousePosition

Gets the position of the mouse cursor in screen coordinates. "The Position property is identical to the Control.MousePosition property."

If you have many cases and do not want to write a ton of strcmp() calls, you could do something like:

switch(my_hash_function(the_string)) {
    case HASH_B1: ...
    /* ...etc... */
}

You just have to make sure your hash function has no collisions inside the set of possible values for the string.

Flow

not inplace solution

let swap= (arr,i,j)=> arr.map((e,k)=> k-i ? (k-j ? e : arr[i]) : arr[j]);

let swap= (arr,i,j)=> arr.map((e,k)=> k-i ? (k-j ? e : arr[i]) : arr[j]);


// test index: 3<->5 (= 'f'<->'d')
let a= ["a","b","c","d","e","f","g"];
let b= swap(a,3,5);

console.log(a,"\n", b);
console.log('Example Flow:', swap(a,3,5).reverse().join('-') );

and inplace solution

let swap= (arr,i,j)=> {let t=arr[i]; arr[i]=arr[j]; arr[j]=t; return arr}


// test index: 3<->5 (= 'f'<->'d')
let a= ["a","b","c","d","e","f","g"];

console.log( swap(a,3,5) )
console.log('Example Flow:', swap(a,3,5).reverse().join('-') );

In this solutions we use "flow pattern" which means that swap function returns array as result - this allow to easily continue processing using dot . (like reverse and join in snippets)

Warning: untested code.

$dailyData = DB::table('page_views')
    ->select('created_at', DB::raw('count(*) as views'))
    ->groupBy('created_at')
    ->get();

You can use ''; to declaring NULL variable in Javascript

Yes you can run JavaFX application on iOS, android, desktop, RaspberryPI (no windows8 mobile yet).

Work in Action :

We did it! JavaFX8 multimedia project on iPad, Android, Windows and Mac!

JavaFX Everywhere

Ensemble8 Javafx8 Android Demo

My Sample JavaFX application Running on Raspberry Pi

My Sample Application Running on Android

JavaFX on iOS and Android

Dev Resources :

Android :

Building and deploying JavaFX Applications on Android

iOS :

NetBeans support for JavaFX for iOS is out!

Develop a JavaFX + iOS app with RoboVM + e(fx)clipse tools in 10 minutes

If you are going to develop serious applications here is some more info

Misc :

At present for JavaFX Oracle priority list is Desktop (Mac,windows,linux) and Embedded (Raspberry Pi, beagle Board etc) .For iOS/android oracle done most of the hardwork and opnesourced javafxports of these platforms as part of OpenJFX ,but there is no JVM from oracle for ios/android.Community is putting all together by filling missing piece(JVM) for ios/android,Community made good progress in running JavaFX on ios (RoboVM) / android(DalvikVM). If you want you can also contribute to the community by sponsoring (Become a RoboVM sponsor) or start developing apps and report issues.

Edit 06/23/2014 :

Johan Vos created a website for javafx ports JavaFX on Mobile and Tablets,check this for updated info ..

I’ve been using ng cli lately, and it was really tough to find a good way to structure my code.

The most efficient one I've seen so far comes from mrholek repository (https://github.com/mrholek/CoreUI-Angular).

This folder structure allows you to keep your root project clean and structure your components, it avoids redundant (sometimes useless) naming convention of the official Style Guide.

Also it’s, this structure is useful to group import when it’s needed and avoid having 30 lines of import for a single file.

src
|
|___ app
|
|   |___ components/shared
|   |   |___ header
|   |
|   |___ containers/layout
|   |   |___ layout1
|   |
|   |___ directives
|   |   |___ sidebar
|   |
|   |___ services
|   |   |___ *user.service.ts* 
|   | 
|   |___ guards
|   |   |___ *auth.guard.ts* 
|   |
|   |___ views
|   |   |___ about  
|   |
|   |___ *app.component.ts*
|   |
|   |___ *app.module.ts*
|   |
|   |___ *app.routing.ts*
|
|___ assets
|
|___ environments
|
|___ img
|   
|___ scss
|
|___ *index.html*
|
|___ *main.ts*

In Python 3, print is a function, you need to call it like print("hello world").

Try like this format and use "width" attribute to manage the image size, it is simple. JavaScript can be implemented in element too.

<button><img src=""></button>

You may interest in using php's inbuilt function realpath(). and passing a constant DIR

for example: $TargetDirectory = realpath(__DIR__."/../.."); //Will take you 2 folder's back

String realpath() :: Returns canonicalized absolute pathname ..

Just drop the option v.

-v is for verbose. If you don't use it then it won't display:

tar -zxf tmp.tar.gz -C ~/tmp1

I had a problem when connecting my android phone, I couldn't charge my phone because the power switch on and then off ... PowerTop let me find this setting and was useful to fix the issue ( auto value was causing issue):

echo 'on' | sudo tee /sys/bus/usb/devices/1-1/power/control

This is not a PowerShell-specific answer, but you could authenticate against the share using "NET USE" first:

net use \\server\share /user:<domain\username> <password>

And then do whatever you need to do in PowerShell...

Your keystore will be in your JAVA_HOME---> JRE -->lib---> security--> cacerts. You need to check where your JAVA_HOME is configured, possibly one of these places,

1. Computer--->Advanced --> Environment variables---> JAVA_HOME

2. Your server startup batch files.

In your import command -keystore cacerts (give full path to the above JRE here instead of just saying cacerts).

Only if you open a new window using window.open() will the new window be able to close using code as I have mentioned above. This works perfectly for me :) Note : Never use href to open the page in a new tab. Window.close() does not work with "href" . Use window.open() instead.

Array.join is what you need, but if you like, the friendly people at phpjs.org have created implode for you.

Then some slightly off topic ranting. As @jon_darkstar alreadt pointed out, jQuery is JavaScript and not vice versa. You don't need to know JavaScript to be able to understand how to use jQuery, but it certainly doesn't hurt and once you begin to appreciate reusability or start looking at the bigger picture you absolutely need to learn it.

I am a bit lazy, so I like simple things:

let users = await Users.find({}, null, {limit: 50});

I tried some of the other solutions listed here, but during unit testing the code would throw exceptions I wanted to ignore. I ended up creating the following recursive search method that will ignore certain exceptions like PathTooLongException and UnauthorizedAccessException.

    private IEnumerable<string> RecursiveFileSearch(string path, string pattern, ICollection<string> filePathCollector = null)
    {
        try
        {
            filePathCollector = filePathCollector ?? new LinkedList<string>();

            var matchingFilePaths = Directory.GetFiles(path, pattern);

            foreach(var matchingFile in matchingFilePaths)
            {
                filePathCollector.Add(matchingFile);
            }

            var subDirectories = Directory.EnumerateDirectories(path);

            foreach (var subDirectory in subDirectories)
            {
                RecursiveFileSearch(subDirectory, pattern, filePathCollector);
            }

            return filePathCollector;
        }
        catch (Exception error)
        {
            bool isIgnorableError = error is PathTooLongException ||
                error is UnauthorizedAccessException;

            if (isIgnorableError)
            {
                return Enumerable.Empty<string>();
            }

            throw error;
        }
    }

I think you can use

sys.exit(0)

You may check it here in the python 2.7 doc:

The optional argument arg can be an integer giving the exit status (defaulting to zero), or another type of object. If it is an integer, zero is considered “successful termination” and any nonzero value is considered “abnormal termination” by shells and the like.

Probably the quickest way to have primary numbers is the following:

import sympy
list(sympy.primerange(lower, upper+1))

In case you don't need to store them, just use the code above without conversion to the list. sympy.primerange is a generator, so it does not consume memory.

I came across this and it went away when I switched from https to http. The SSL certs we use in dev aren't verified by a 3rd party. They're just locally generated dev certs.

The same calls work just fine in Chrome Canary and Firefox. These browsers don't appear to be as strict about the SSL cert as Chrome is. The calls would fail in Chrome with the "CAUTION: Provisional headers..." message.

I think/hope that when we use a legit SSL cert in stage and prod, we won't see this behavior in Chrome anymore.

Theres these available options:-

DB2 has several strategies to cope with this problem.
You can use the "scrollable cursor" in feature.
In this case you can open a cursor and, instead of re-issuing a query you can FETCH forward and backward.
This works great if your application can hold state since it doesn't require DB2 to rerun the query every time.
You can use the ROW_NUMBER() OLAP function to number rows and then return the subset you want.
This is ANSI SQL 
You can use the ROWNUM pseudo columns which does the same as ROW_NUMBER() but is suitable if you have Oracle skills.
You can use LIMIT and OFFSET if you are more leaning to a mySQL or PostgreSQL dialect.  

Don't forget the !important declaration, for a better result

button:focus {outline:0 !important;}

A rule that has the !important property will always be applied no matter where that rule appears in the CSS document.

This answer extends on Jayson's excellent answer with some more opinionated guidance on the best approach for your use case:

• SDKMAN is the best solution for most users. It's easy to use, doesn't have any weird configuration, and makes managing multiple versions for lots of other Java ecosystem projects easy as well.
• Downloading Java versions via Homebrew and switching versions via jenv is a good option, but requires more work. For example, the Homebrew commands in this highly upvoted answer don't work anymore. jenv is slightly harder to setup, the plugins aren't well documented, and the README says the project is looking for a new maintainer. jenv is still a great project, solves the job, and the community should be thankful for the wonderful contribution. SDKMAN is just the better option cause it's so great.
• Jabba is written is a multi-platform solution that provides the same interface on Mac, Windows, and PC (it's written in Go and that's what allows it to be multiplatform). If you care about a multiplatform solution, this is a huge selling point. If you only care about running multiple versions on your Mac, then you don't need a multiplatform solution. SDKMAN's support for tens of popular SDKs is what you're missing out on if you go with Jabba.

Managing versions manually is probably the worst option. If you decide to manually switch versions, you can use this Bash code instead of Jayson's verbose code (code snippet from the homebrew-openjdk README:

jdk() {
        version=$1
        export JAVA_HOME=$(/usr/libexec/java_home -v"$version");
        java -version
 }

Jayson's answer provides the basic commands for SDKMAN and jenv. Here's more info on SDKMAN and more info on jenv if you'd like more background on these tools.

I have the same issue and my solution is change a little thing in Build Settings

SWIFT_COMPILATION_MODE = singlefile;
SWIFT_OPTIMIZATION_LEVEL = "-O";

Putting it in the "web.config" works fine. The problem was that I got the MIME type wrong. Instead of font/x-woff or font/x-font-woff it must be application/font-woff:

<system.webServer>
  ...
  <staticContent>
    <remove fileExtension=".woff" />
    <mimeMap fileExtension=".woff" mimeType="application/font-woff" />
  </staticContent>
</system.webServer>

See also this answer regarding the MIME type: https://stackoverflow.com/a/5142316/135441

Update 4/10/2013

Spec is now a recommendation and the MIME type is officially: application/font-woff

I was doing the course on Udacity for git hub and was having this same issue. Here is my final code that make is work correctly.

# Change command prompt
alias __git_ps1="git branch 2>/dev/null | grep '*' | sed 's/* \ .   (.*\)/(\1)/'"

if [ -f ~/.git-completion.bash ]; then
  source ~/.git-completion.bash
  export PS1='[\W]$(__git_ps1 "(%s)"): '
fi

source ~/.git-prompt.sh
export GIT_PS1_SHOWDIRTYSTATE=1
# '\u' adds the name of the current user to the prompt
# '\$(__git_ps1)' adds git-related stuff
# '\W' adds the name of the current directory
export PS1="$purple\u$green\$(__git_ps1)$blue \W $ $reset"

It works! https://i.stack.imgur.com/d0lvb.jpg

In windows 7, I Got it resolved after adding the environment variables in system level. If you do not have enough permission try to set the %JAVA_HOME% and the %M2_HOME% in System variables instead of User Variables.

if you want to find datadir in linux or windows you can do following command

mysql -uUSER -p -e 'SHOW VARIABLES WHERE Variable_Name = "datadir"'

if you are interested to find datadir you can use grep & awk command

mysql -uUSER -p -e 'SHOW VARIABLES WHERE Variable_Name = "datadir"' | grep 'datadir' | awk '{print $2}'

Option 1: Declare a struct with an int and string and return a struct variable.

struct foo {    
 int bar1;
 char bar2[MAX];
};

struct foo fun() {
 struct foo fooObj;
 ...
 return fooObj;
}

Option 2: You can pass one of the two via pointer and make changes to the actual parameter through the pointer and return the other as usual:

int fun(char **param) {
 int bar;
 ...
 strcpy(*param,"....");
 return bar;
}

or

 char* fun(int *param) {
 char *str = /* malloc suitably.*/
 ...
 strcpy(str,"....");
 *param = /* some value */
 return str;
}

Option 3: Similar to the option 2. You can pass both via pointer and return nothing from the function:

void fun(char **param1,int *param2) {
 strcpy(*param1,"....");
 *param2 = /* some calculated value */
}

If ad hoc updates to system catalog is "not supported", or if you get a "Msg 5808" then you will need to configure with override like this:

EXEC sp_configure 'show advanced options', 1
RECONFIGURE with override
GO
EXEC sp_configure 'ad hoc distributed queries', 1
RECONFIGURE with override
GO

If the code of the previous posts doesn't work, give this a try:

$("a.ui-dialog-titlebar-close")[0].click();

Converting Using OpenSSL

These commands allow you to convert certificates and keys to different formats to make them compatible with specific types of servers or software.

• Convert a DER file (.crt .cer .der) to PEM

  openssl x509 -inform der -in certificate.cer -out certificate.pem
  

• Convert a PEM file to DER

  openssl x509 -outform der -in certificate.pem -out certificate.der
  

• Convert a PKCS#12 file (.pfx .p12) containing a private key and certificates to PEM

  openssl pkcs12 -in keyStore.pfx -out keyStore.pem -nodes
  
  You can add -nocerts to only output the private key or add -nokeys to only output the certificates.
  

• Convert a PEM certificate file and a private key to PKCS#12 (.pfx .p12)

  openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile CACert.crt
  

• Convert PEM to CRT (.CRT file)

  openssl x509 -outform der -in certificate.pem -out certificate.crt
  

OpenSSL Convert PEM

• Convert PEM to DER

  openssl x509 -outform der -in certificate.pem -out certificate.der
  

• Convert PEM to P7B

  openssl crl2pkcs7 -nocrl -certfile certificate.cer -out certificate.p7b -certfile CACert.cer
  

• Convert PEM to PFX

  openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile CACert.crt
  

OpenSSL Convert DER

• Convert DER to PEM

  openssl x509 -inform der -in certificate.cer -out certificate.pem
  

OpenSSL Convert P7B

• Convert P7B to PEM

  openssl pkcs7 -print_certs -in certificate.p7b -out certificate.cer
  

• Convert P7B to PFX

  openssl pkcs7 -print_certs -in certificate.p7b -out certificate.cer
  
  openssl pkcs12 -export -in certificate.cer -inkey privateKey.key -out certificate.pfx -certfile CACert.cer
  

OpenSSL Convert PFX

• Convert PFX to PEM

  openssl pkcs12 -in certificate.pfx -out certificate.cer -nodes
  

Generate rsa keys by OpenSSL

• Using OpenSSL on the command line you’d first need to generate a public and private key, you should password protect this file using the -passout argument, there are many different forms that this argument can take so consult the OpenSSL documentation about that.

  openssl genrsa -out private.pem 1024
  

• This creates a key file called private.pem that uses 1024 bits. This file actually have both the private and public keys, so you should extract the public one from this file:

  openssl rsa -in private.pem -out public.pem -outform PEM -pubout
  
  or
  
  openssl rsa -in private.pem -pubout > public.pem
  
  or
  
  openssl rsa -in private.pem -pubout -out public.pem
  

  You’ll now have public.pem containing just your public key, you can freely share this with 3rd parties. You can test it all by just encrypting something yourself using your public key and then decrypting using your private key, first we need a bit of data to encrypt:

• Example file :

  echo 'too many secrets' > file.txt
  

• You now have some data in file.txt, lets encrypt it using OpenSSL and the public key:

  openssl rsautl -encrypt -inkey public.pem -pubin -in file.txt -out file.ssl
  

• This creates an encrypted version of file.txt calling it file.ssl, if you look at this file it’s just binary junk, nothing very useful to anyone. Now you can unencrypt it using the private key:

  openssl rsautl -decrypt -inkey private.pem -in file.ssl -out decrypted.txt
  

• You will now have an unencrypted file in decrypted.txt:

  cat decrypted.txt
  |output -> too many secrets
  

RSA TOOLS Options in OpenSSL

• NAME

  rsa - RSA key processing tool

• SYNOPSIS

  openssl rsa [-help] [-inform PEM|NET|DER] [-outform PEM|NET|DER] [-in filename] [-passin arg] [-out filename] [-passout arg] [-aes128] [-aes192] [-aes256] [-camellia128] [-camellia192] [-camellia256] [-des] [-des3] [-idea] [-text] [-noout] [-modulus] [-check] [-pubin] [-pubout] [-RSAPublicKey_in] [-RSAPublicKey_out] [-engine id]

• DESCRIPTION

  The rsa command processes RSA keys. They can be converted between various forms and their components printed out. Note this command uses the traditional SSLeay compatible format for private key encryption: newer applications should use the more secure PKCS#8 format using the pkcs8 utility.

• COMMAND OPTIONS

  -help
  

  Print out a usage message.

  -inform DER|NET|PEM
  

  This specifies the input format. The DER option uses an ASN1 DER encoded form compatible with the PKCS#1 RSAPrivateKey or SubjectPublicKeyInfo format. The PEM form is the default format: it consists of the DER format base64 encoded with additional header and footer lines. On input PKCS#8 format private keys are also accepted. The NET form is a format is described in the NOTES section.

  -outform DER|NET|PEM
  

  This specifies the output format, the options have the same meaning as the -inform option.

  -in filename
  

  This specifies the input filename to read a key from or standard input if this option is not specified. If the key is encrypted a pass phrase will be prompted for.

  -passin arg
  

  the input file password source. For more information about the format of arg see the PASS PHRASE ARGUMENTS section in openssl.

  -out filename
  

  This specifies the output filename to write a key to or standard output if this option is not specified. If any encryption options are set then a pass phrase will be prompted for. The output filename should not be the same as the input filename.

  -passout password
  

  the output file password source. For more information about the format of arg see the PASS PHRASE ARGUMENTS section in openssl.

  -aes128|-aes192|-aes256|-camellia128|-camellia192|-camellia256|-des|-des3|-idea
  

  These options encrypt the private key with the specified cipher before outputting it. A pass phrase is prompted for. If none of these options is specified the key is written in plain text. This means that using the rsa utility to read in an encrypted key with no encryption option can be used to remove the pass phrase from a key, or by setting the encryption options it can be use to add or change the pass phrase. These options can only be used with PEM format output files.

  -text
  

  prints out the various public or private key components in plain text in addition to the encoded version.

  -noout
  

  this option prevents output of the encoded version of the key.

  -modulus
  

  this option prints out the value of the modulus of the key.

  -check
  

  this option checks the consistency of an RSA private key.

  -pubin
  

  by default a private key is read from the input file: with this option a public key is read instead.

  -pubout
  

  by default a private key is output: with this option a public key will be output instead. This option is automatically set if the input is a public key.

  -RSAPublicKey_in, -RSAPublicKey_out
  

  like -pubin and -pubout except RSAPublicKey format is used instead.

  -engine id
  

  specifying an engine (by its unique id string) will cause rsa to attempt to obtain a functional reference to the specified engine, thus initialising it if needed. The engine will then be set as the default for all available algorithms.

• NOTES

  The PEM private key format uses the header and footer lines:

  -----BEGIN RSA PRIVATE KEY-----
  
  -----END RSA PRIVATE KEY-----
  

  The PEM public key format uses the header and footer lines:

  -----BEGIN PUBLIC KEY-----
  
  -----END PUBLIC KEY-----
  

  The PEM RSAPublicKey format uses the header and footer lines:

  -----BEGIN RSA PUBLIC KEY-----
  
  -----END RSA PUBLIC KEY-----
  

  The NET form is a format compatible with older Netscape servers and Microsoft IIS .key files, this uses unsalted RC4 for its encryption. It is not very secure and so should only be used when necessary.

  Some newer version of IIS have additional data in the exported .key files. To use these with the utility, view the file with a binary editor and look for the string "private-key", then trace back to the byte sequence 0x30, 0x82 (this is an ASN1 SEQUENCE). Copy all the data from this point onwards to another file and use that as the input to the rsa utility with the -inform NET option.

  EXAMPLES

  To remove the pass phrase on an RSA private key:

   openssl rsa -in key.pem -out keyout.pem
  

  To encrypt a private key using triple DES:

   openssl rsa -in key.pem -des3 -out keyout.pem
  

  To convert a private key from PEM to DER format:

    openssl rsa -in key.pem -outform DER -out keyout.der
  

  To print out the components of a private key to standard output:

    openssl rsa -in key.pem -text -noout
  

  To just output the public part of a private key:

    openssl rsa -in key.pem -pubout -out pubkey.pem
  

  Output the public part of a private key in RSAPublicKey format:

    openssl rsa -in key.pem -RSAPublicKey_out -out pubkey.pem
  

Some js files come from the web or library, they are not written by yourself. The code they get variable like this:

var queryString = document.location.search.substring(1);
var params = PDFViewerApplication.parseQueryString(queryString);
var file = 'file' in params ? params.file : DEFAULT_URL;

This method makes js files unchanged(keep independence), and pass variable correctly!

np.max is just an alias for np.amax. This function only works on a single input array and finds the value of maximum element in that entire array (returning a scalar). Alternatively, it takes an axis argument and will find the maximum value along an axis of the input array (returning a new array).

>>> a = np.array([[0, 1, 6],
                  [2, 4, 1]])
>>> np.max(a)
6
>>> np.max(a, axis=0) # max of each column
array([2, 4, 6])

The default behaviour of np.maximum is to take two arrays and compute their element-wise maximum. Here, 'compatible' means that one array can be broadcast to the other. For example:

>>> b = np.array([3, 6, 1])
>>> c = np.array([4, 2, 9])
>>> np.maximum(b, c)
array([4, 6, 9])

But np.maximum is also a universal function which means that it has other features and methods which come in useful when working with multidimensional arrays. For example you can compute the cumulative maximum over an array (or a particular axis of the array):

>>> d = np.array([2, 0, 3, -4, -2, 7, 9])
>>> np.maximum.accumulate(d)
array([2, 2, 3, 3, 3, 7, 9])

This is not possible with np.max.

You can make np.maximum imitate np.max to a certain extent when using np.maximum.reduce:

>>> np.maximum.reduce(d)
9
>>> np.max(d)
9

Basic testing suggests the two approaches are comparable in performance; and they should be, as np.max() actually calls np.maximum.reduce to do the computation.

Another way to find out if a column exists is to check for Nothing the value returned from the Columns collection indexer when passing the column name to it:

If dataRow.Table.Columns("ColumnName") IsNot Nothing Then
    MsgBox("YAY")
End If

This approach might be preferred over the one that uses the Contains("ColumnName") method when the following code will subsequently need to get that DataColumn for further usage. For example, you may want to know which type has a value stored in the column:

Dim column = DataRow.Table.Columns("ColumnName")
If column IsNot Nothing Then
    Dim type = column.DataType
End If

In this case this approach saves you a call to the Contains("ColumnName") at the same time making your code a bit cleaner.

In my opinion, it would be a cleaner and easier solution to just set a class on the body and set the font-family in css according to that class.
don't know if that's an option in your case though.

The String class provides valueOf methods for all primitive types and Object type so I assume they are convenience methods that can all be accessed through the one class.

NB Profiling results

Average intToString = 5368ms, Average stringValueOf = 5689ms (for 100,000,000 operations)

public class StringIntTest {


    public static long intToString () {
        long startTime = System.currentTimeMillis();
        for (int i = 0; i < 100000000; i++) {
            String j = Integer.toString(i);
        }
        long finishTime = System.currentTimeMillis();

        return finishTime - startTime;
    }

    public static long stringValueOf () {

        long startTime = System.currentTimeMillis();
        for (int i = 0; i < 100000000; i++) {
            String j = String.valueOf(i);
        }
        long finishTime = System.currentTimeMillis();

        return finishTime - startTime;
    }

    public static void main(String[] args) {
        long intToStringElapsed = 0;
        long stringValueOfElapsed = 0;
        for (int i = 0; i < 10; i++) {
            intToStringElapsed += intToString();
            stringValueOfElapsed+= stringValueOf();
        }
        System.out.println("Average intToString = "+ (intToStringElapsed /10));
        System.out.println("Average stringValueOf = " +(stringValueOfElapsed / 10));
    }
}

1. Right Click Xampp Icon
2. Go to TOOLS
3. Then Find Reinstall Services
4. If something pops out which is the windows firewall just allow access.

Then after a minute all should be good :) hope it helps :)

I love jQuery's method chaining. Simply do...

    var value = $("#text").val().replace('.',':');

    //Or if you want to return the value:
    return $("#text").val().replace('.',':');

In the case you need to do some asynchronous code (like sending a message to the server that the user is not focused on your page right now), the event beforeunload will not give time to the async code to run. In the case of async I found that the visibilitychange and mouseleave events are the best options. These events fire when the user change tab, or hiding the browser, or taking the courser out of the window scope.

document.addEventListener('mouseleave', e=>{_x000D_
     //do some async code_x000D_
})_x000D_
_x000D_
document.addEventListener('visibilitychange', e=>{_x000D_
     if (document.visibilityState === 'visible') {_x000D_
   //report that user is in focus_x000D_
    } else {_x000D_
     //report that user is out of focus_x000D_
    }  _x000D_
})

You can use var_dump or print_r functions on Blade themplate via Controller functions :

class myController{

   public function showView(){
     return view('myView',["myController"=>$this]);
   }
   public function myprint($obj){
     echo "<pre>";
     print_r($obj);
     echo "</pre>";
   }
}

And use your blade themplate :

$myController->myprint($users);

You can do as

 body{
        background:url('equote.png'),url('equote.png');
        background-size:400px 100px,50px 50px;
    }

Creating an IPA is done along the same way as creating an .xcarchive: Product -> Archive. After the Archive operation completes, go to the Organizer, select your archive, select Share and in the "Select the content and options for sharing:" pane set Contents to "iOS App Store Package (.ipa) and Identity to iPhone Distribution (which should match your ad hoc/app store provisioning profile for the project).

Chances are the "iOS App Store Package (.ipa)" option may be disabled. This happens when your build produces more than a single target: say, an app and a library. All of them end up in the build products folder and Xcode gets naïvely confused about how to package them both into an .ipa file, so it merely disables the option.

A way to solve this is as follows: go through build settings for each of the targets, except the application target, and set Skip Install flag to YES. Then do the Product -> Archive tango once again and go to the Organizer to select your new archive. Now, when clicking on the Share button, the .ipa option should be enabled.

I hope this helps.

Make a surrounding div-tag, and set for it display: grid in its style attribute.

<div style='display: grid; 
            text-align: center;
            background-color: antiquewhite'
>
  <table>
    <tr>
      <th>Month</th>
      <th>Savings</th>
    </tr>
    <tr>
      <td>January</td>
      <td>$100</td>
    </tr>
    <tr>
      <td>February</td>
      <td>$80</td>
    </tr>
  </table>
</div>

The text-align property is set only to show, that the text in the regular table cells are affected by it, even though it is set on the surrounding div. The same with the background-color but it is hard to say which element actually holds the background-color.

Use this

os.chdir('C:/Users\expoperialed\Desktop\Python')

I don't really like any of these answers regarding a "simple" solution :S

I would go for a simple ;), pure Java, one liner (entropy is based on random string length and the given character set):

public String randomString(int length, String characterSet) {
    return IntStream.range(0, length).map(i -> new SecureRandom().nextInt(characterSet.length())).mapToObj(randomInt -> characterSet.substring(randomInt, randomInt + 1)).collect(Collectors.joining());
}

@Test
public void buildFiveRandomStrings() {
    for (int q = 0; q < 5; q++) {
        System.out.println(randomString(10, "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")); // The character set can basically be anything
    }
}

Or (a bit more readable old way)

public String randomString(int length, String characterSet) {
    StringBuilder sb = new StringBuilder(); // Consider using StringBuffer if needed
    for (int i = 0; i < length; i++) {
        int randomInt = new SecureRandom().nextInt(characterSet.length());
        sb.append(characterSet.substring(randomInt, randomInt + 1));
    }
    return sb.toString();
}

@Test
public void buildFiveRandomStrings() {
    for (int q = 0; q < 5; q++) {
        System.out.println(randomString(10, "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")); // The character set can basically be anything
    }
}

But on the other hand you could also go with UUID which has a pretty good entropy:

UUID.randomUUID().toString().replace("-", "")

Was looking at how to trust a certificate while using jenkins cli, and found https://issues.jenkins-ci.org/browse/JENKINS-12629 which has some recipe for that.

This will give you the certificate:

openssl s_client -connect ${HOST}:${PORT} </dev/null

if you are interested only in the certificate part, cut it out by piping it to:

| sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p'

and redirect to a file:

> ${HOST}.cert

Then import it using keytool:

keytool -import -noprompt -trustcacerts -alias ${HOST} -file ${HOST}.cert \
    -keystore ${KEYSTOREFILE} -storepass ${KEYSTOREPASS}

In one go:

HOST=myhost.example.com
PORT=443
KEYSTOREFILE=dest_keystore
KEYSTOREPASS=changeme

# get the SSL certificate
openssl s_client -connect ${HOST}:${PORT} </dev/null \
    | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ${HOST}.cert

# create a keystore and import certificate
keytool -import -noprompt -trustcacerts \
    -alias ${HOST} -file ${HOST}.cert \
    -keystore ${KEYSTOREFILE} -storepass ${KEYSTOREPASS}

# verify we've got it.
keytool -list -v -keystore ${KEYSTOREFILE} -storepass ${KEYSTOREPASS} -alias ${HOST}

In the examples below the client is the browser and the server is the webserver hosting the website.

Before you can understand these technologies, you have to understand classic HTTP web traffic first.

Regular HTTP:

1. A client requests a webpage from a server.
2. The server calculates the response
3. The server sends the response to the client.

Ajax Polling:

1. A client requests a webpage from a server using regular HTTP (see HTTP above).
2. The client receives the requested webpage and executes the JavaScript on the page which requests a file from the server at regular intervals (e.g. 0.5 seconds).
3. The server calculates each response and sends it back, just like normal HTTP traffic.

Ajax Long-Polling:

1. A client requests a webpage from a server using regular HTTP (see HTTP above).
2. The client receives the requested webpage and executes the JavaScript on the page which requests a file from the server.
3. The server does not immediately respond with the requested information but waits until there's new information available.
4. When there's new information available, the server responds with the new information.
5. The client receives the new information and immediately sends another request to the server, re-starting the process.

HTML5 Server Sent Events (SSE) / EventSource:

1. A client requests a webpage from a server using regular HTTP (see HTTP above).
2. The client receives the requested webpage and executes the JavaScript on the page which opens a connection to the server.

3. The server sends an event to the client when there's new information available.

   • Real-time traffic from server to client, mostly that's what you'll need
   • You'll want to use a server that has an event loop
   • Connections with servers from other domains are only possible with correct CORS settings
   • If you want to read more, I found these very useful: (article), (article), (article), (tutorial).

HTML5 Websockets:

1. A client requests a webpage from a server using regular http (see HTTP above).
2. The client receives the requested webpage and executes the JavaScript on the page which opens a connection with the server.

3. The server and the client can now send each other messages when new data (on either side) is available.

   • Real-time traffic from the server to the client and from the client to the server
   • You'll want to use a server that has an event loop
   • With WebSockets it is possible to connect with a server from another domain.
   • It is also possible to use a third party hosted websocket server, for example Pusher or others. This way you'll only have to implement the client side, which is very easy!
   • If you want to read more, I found these very useful: (article), (article) (tutorial).

Comet:

Comet is a collection of techniques prior to HTML5 which use streaming and long-polling to achieve real time applications. Read more on wikipedia or this article.

Now, which one of them should I use for a realtime app (that I need to code). I have been hearing a lot about websockets (with socket.io [a node.js library]) but why not PHP ?

You can use PHP with WebSockets, check out Ratchet.

How about sed?

hour=`echo $hour|sed -e "s/^0*//g"`

IF vertical align won't work use padding. padding-top: 10px; it will shift the text to the bottom or padding-bottom: 10px; to shift the text in the text box to top

adjust the padding size till it suit the size you want. Thats the hack

You can also try http://kaffeine.herokuapp.com (made by me), it's made for preventing Heroku apps to go to sleep. It will ping your app every 10 minutes so your app won't go to sleep. It's completely free.

How are you running the program?

It's not the java file that is being ran but rather the .class file that is created by compiling the java code. You will either need to specify the absolute path like user1420750 says or a relative path to your System.getProperty("user.dir") directory. This should be the working directory or the directory you ran the java command from.

As of MySQL 5.6 the approach below works faster due to online DDL (note algorithm=inplace):

alter table tablename auto_increment=1, algorithm=inplace;

Look at the help page for load. What load returns is the names of the objects created, so you can look at the contents of isfar to see what objects were created. The fact that nothing else is showing up with ls() would indicate that maybe there was nothing stored in your file.

Also note that load will overwrite anything in your global environment that has the same name as something in the file being loaded when used with default behavior. If you mainly want to examine what is in the file, and possibly use something from that file along with other objects in your global environment then it may be better to use the attach function or create a new environment (new.env) and load the file into that environment using the envir argument to load.

set WRAP OFF
set PAGESIZE 0

Try using those settings.

You can easily define a getter for your array and clear it as follows:

  formGroup: FormGroup    
  constructor(private fb: FormBuilder) { }

  ngOnInit() {
    this.formGroup = this.fb.group({
      sliders: this.fb.array([])
    })
  }
  get sliderForms() {
    return this.formGroup.get('sliders') as FormArray
  }

  clearAll() {
    this.formGroup.reset()
    this.sliderForms.clear()
  }

XPath has a contains-token function, specifically designed for this situation:

//div[contains-token(@class, 'Test')]

It's only supported in the latest version of XPath (3.1) so you'll need an up-to-date implementation.

Run package declaration and body separately.

**//With the help of this code u not just sort the arrays in alphabetical order but also can take string from user or console or keyboard

import java.util.Scanner;
import java.util.Arrays;
public class ReadName
{
final static int ARRAY_ELEMENTS = 3;
public static void main(String[] args)
{
String[] theNames = new String[5];
Scanner keyboard = new Scanner(System.in);
System.out.println("Enter the names: ");
for (int i=0;i<theNames.length ;i++ )
{           
theNames[i] = keyboard.nextLine();
}
System.out.println("**********************");
Arrays.sort(theNames);
for (int i=0;i<theNames.length ;i++ )
{
System.out.println("Name are " + theNames[i]);
}
}
}**

Here is a function that will work for numeric or string indices. Pass the array as first parameter, then the index to the element that needs to be moved and finally set the direction to -1 to move the element up and to 1 to move it down. Example: Move(['first'=>'Peter','second'=>'Paul','third'=>'Kate'],'second',-1) will move Paul up and Peter down.

function Move($a,$element,$direction)
{

$temp = [];
$index = 0;

foreach($a as $key=>$value)
{
    $temp[$index++] = $key;
}

$index = array_search($element,$temp);

$newpos = $index+$direction;

if(isset($temp[$newpos]))
{
        $value2 = $temp[$newpos];
        $temp[$newpos]=$element;
        $temp[$index]=$value2;
}
else
{
    # move is not possible
    return $a; # returns the array unchanged
}   

$final = [];

foreach($temp as $next)
{
    $final[$next]=$a[$next];
}

return $final;

}

This is too simple

final CharSequence[] items = {"Take Photo", "Choose from Library", "Cancel"};

AlertDialog.Builder builder = new AlertDialog.Builder(MyProfile.this);

builder.setTitle("Add Photo!");
builder.setItems(items, new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int item) {
        if (items[item].equals("Take Photo")) {
            getCapturesProfilePicFromCamera();
        } else if (items[item].equals("Choose from Library")) {
            getProfilePicFromGallery();
        } else if (items[item].equals("Cancel")) {
            dialog.dismiss();
        }
    }
});
builder.show();

   Create PROCEDURE USP_S_NameAvilability
     (@Value VARCHAR(50)=null,
      @TableName VARCHAR(50)=null,
      @ColumnName VARCHAR(50)=null)
        AS
        BEGIN
        DECLARE @cmd AS NVARCHAR(max)
        SET @Value = ''''+@Value+ ''''
        SET @cmd = N'SELECT * FROM ' + @TableName + ' WHERE ' +  @ColumnName + ' = ' + @Value
        EXEC(@cmd)
      END

As i have tried one the answer, it is getting executed successfully but while running its not giving correct output, the above works well

You must use it.

The practice of using a semicolon to terminate statements is standard and in fact is a requirement in several other database platforms. SQL Server requires the semicolon only in particular cases—but in cases where a semicolon is not required, using one doesn’t cause problems. I strongly recommend that you adopt the practice of terminating all statements with a semicolon. Not only will doing this improve the readability of your code, but in some cases it can save you some grief. (When a semicolon is required and is not specified, the error message SQL Server produces is not always very clear.)

And most important:

The SQL Server documentation indicates that not terminating T-SQL statements with a semicolon is a deprecated feature. This means that the long-term goal is to enforce use of the semicolon in a future version of the product. That’s one more reason to get into the habit of terminating all of your statements, even where it’s currently not required.

Source: Microsoft SQL Server 2012 T-SQL Fundamentals by Itzik Ben-Gan.

An example of why you always must use ; are the following two queries (copied from this post):

BEGIN TRY
    BEGIN TRAN
    SELECT 1/0 AS CauseAnException
    COMMIT
END TRY
BEGIN CATCH
    SELECT ERROR_MESSAGE()
    THROW
END CATCH

BEGIN TRY
    BEGIN TRAN
    SELECT 1/0 AS CauseAnException;
    COMMIT
END TRY
BEGIN CATCH
    SELECT ERROR_MESSAGE();
    THROW
END CATCH

foo module in python would be the equivalent to a Foo class file in Java

or

foobar module in python would be the equivalent to a FooBar class file in Java

Download it from here and extract LatoOFL.rar then go to TTF and open this font-face-generator click at Choose File choose font which you want to use and click at generate then download it and then go html file open it and you see the code like this

@font-face {
        font-family: "Lato Black";
        src: url('698242188-Lato-Bla.eot');
        src: url('698242188-Lato-Bla.eot?#iefix') format('embedded-opentype'),
        url('698242188-Lato-Bla.svg#Lato Black') format('svg'),
        url('698242188-Lato-Bla.woff') format('woff'),
        url('698242188-Lato-Bla.ttf') format('truetype');
        font-weight: normal;
        font-style: normal;
}
body{
    font-family: "Lato Black";
    direction: ltr;
}

change the src code and give the url where your this font directory placed, now you can use it at your website...

If you don't want to download it use this

<link type='text/css' href='http://fonts.googleapis.com/css?family=Lato:400,700' />

You test k = M instead of k == M.
Maybe it is what you want to do, in this case, write if (match == 0 && (k = M))

I'd like to share one more way to load not only css but all the assets (js, css, images) and handle onload event for the bunch of files. It's async-assets-loader. See the example below:

<script src="https://unpkg.com/async-assets-loader"></script>
<script>
var jsfile = "https://code.jquery.com/jquery-3.4.1.min.js";
var cssfile = "https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css";
var imgfile = "https://logos.keycdn.com/keycdn-logo-black.png";
var assetsLoader = new asyncAssetsLoader();
assetsLoader.load([
      {uri: jsfile, type: "script"},
      {uri: cssfile, type: "style"},
      {uri: imgfile, type: "img"}
    ], function () {
      console.log("Assets are loaded");
      console.log("Img width: " + assetsLoader.getLoadedTags()[imgfile].width);
    });
</script> 

According to the async-assets-loader docs

If you just want to display it when you get a response add this to your loadpage()

function loadpage(page_request, containerid){
   if (page_request.readyState == 4 && page_request.status==200) { 
      var container = document.getElementById(containerid);
      container.innerHTML=page_request.responseText;
      container.style.visibility = 'visible';
      // or 
      container.style.display = 'block';
}

but this depend entirely on how you hid the div in the first place

Recommended: don't translate in the controller, translate in your view

I'd recommend to keep your controller free from translation logic and translate your strings directly inside your view like this:

<h1>{{ 'TITLE.HELLO_WORLD' | translate }}</h1>

Using the provided service

Angular Translate provides the $translate service which you can use in your Controllers.

An example usage of the $translate service can be:

.controller('TranslateMe', ['$scope', '$translate', function ($scope, $translate) {
    $translate('PAGE.TITLE')
        .then(function (translatedValue) {
            $scope.pageTitle = translatedValue;
        });
});

The translate service also has a method for directly translating strings without the need to handle a promise, using $translate.instant():

.controller('TranslateMe', ['$scope', '$translate', function ($scope, $translate) {
    $scope.pageTitle = $translate.instant('TITLE.DASHBOARD'); // Assuming TITLE.DASHBOARD is defined
});

The downside with using $translate.instant() could be that the language file isn't loaded yet if you are loading it async.

Using the provided filter

This is my preferred way since I don't have to handle promises this way. The output of the filter can be directly set to a scope variable.

.controller('TranslateMe', ['$scope', '$filter', function ($scope, $filter) {
    var $translate = $filter('translate');

    $scope.pageTitle = $translate('TITLE.DASHBOARD'); // Assuming TITLE.DASHBOARD is defined
});

Using the provided directive

Since @PascalPrecht is the creator of this awesome library, I'd recommend going with his advise (see his answer below) and use the provided directive which seems to handle translations very intelligent.

The directive takes care of asynchronous execution and is also clever enough to unwatch translation ids on the scope if the translation has no dynamic values.

Most browsers will let you put very large amounts of data in a URL and thus lots of things end up creating very large URLs so if you are talking about anything more than the domain part of a URL you will need to use a TEXT column since the VARCHAR/CHAR are limited.

Applied the instructions from this answer and it worked Just to point out a more copy paste like answer ( because cygwin installation procedure is kind of anti-copy-paste wise implemented )
Click WinLogo button , type cmd.exe , right click it , choose "Start As Administrator". In cmd prompt:

 cd <directory_where_i_forgot_the setup-x86_64.exe> cygwin installer:
 set package_name=cygrunsrv cron
 setup-x86_64.exe -n -q -s http://cygwin.mirror.constant.com -P %package_name%

Ensure the installer does not throw any errors in the prompt ... If it has - you probably have some cygwin binaries running or you are not an Windows admin, or some freaky bug ...

Now in cmd promt:

 C:\cygwin64\bin\cygrunsrv.exe -I cron -p /usr/sbin/cron -a -D   

or whatever full file path you might have to the cygrunsrv.exe and start the cron as windows service in the cmd prompt

 net start cron

Now in bash terminal run crontab -e

set up you cron entry an example bellow:

        #sync my gdrive each 10th minute
    */10 * * * * /home/Yordan/sync_gdrive.sh

    # * * * * * command to be executed
    # - - - - -
    # | | | | |
    # | | | | +- - - - day of week (0 - 6) (Sunday=0)
    # | | | +- - - - - month (1 - 12)
    # | | +- - - - - - day of month (1 - 31)
    # | +- - - - - - - hour (0 - 23)
    # +--------------- minute

why not both to be sure?

if(opener.document){
  $("#testdiv",opener.document).doStuff();
}else{
  $("#testdiv",window.opener).doStuff();
}

if needed programmatic from a PDE or JDT code:

public static void setWorkspaceAutoBuild(boolean flag) throws CoreException 
{
IWorkspace workspace = ResourcesPlugin.getWorkspace();
final IWorkspaceDescription description = workspace.getDescription();
description.setAutoBuilding(flag);
workspace.setDescription(description);
}

1. Go to "Database" Menu option
2. Select the "Reverse Engineer" option.
3. A wizard will be open and it will generate the ER Diagram for you.

This is a solution. Later you can split by ":" and take the values of the array

 /**
 * Converts milliseconds to human readeable language separated by ":"
 * Example: 190980000 --> 2:05:3 --> 2days 5hours 3min
 */
function dhm(t){
    var cd = 24 * 60 * 60 * 1000,
        ch = 60 * 60 * 1000,
        d = Math.floor(t / cd),
        h = '0' + Math.floor( (t - d * cd) / ch),
        m = '0' + Math.round( (t - d * cd - h * ch) / 60000);
    return [d, h.substr(-2), m.substr(-2)].join(':');
}

//Example
var delay = 190980000;                   
var fullTime = dhm(delay);
console.log(fullTime);

That for changing directory of the XAMPP. So you have to change the Directory as well as ServerRoot "E:/xampp/apache"

DocumentRoot "E:/xampp/htdocs"


<Directory "E:/xampp/htdocs">


ScriptAlias /cgi-bin/ "E:/xampp/cgi-bin/"


<Directory "E:/xampp/cgi-bin">
    AllowOverride All
    Options None
    Require all granted
</Directory>

I also facing same problem for changing My laptop. thanks

I had the same problem. Check wether plt.isinteractive() is True. Setting it to 'False' helped for me.

plt.interactive(False)

document.getElementById('id1').bgColor = '#00FF00';

seems to work. I don't think .style.backgroundColor does.

I had a similar situation and solved it like this:

WebElement webElement = driver.findElement(By.xpath(""));
webElement.sendKeys(Keys.TAB);
webElement.sendKeys(Keys.ENTER);

While I would be tempted to blame my issues - I'm getting the same error with my query, which is much, much bigger and involves a lot of loops - on the network, I think this is not the case.

Unfortunately it's not that simple. Query runs for 3+ hours before getting that error and apparently it crashes at the same time if it's just a query in SSMS and a job on SQL Server (did not look into details of that yet, so not sure if it's the same error; definitely same spot, though).

So just in case someone comes here with similar problem, this thread: https://www.sqlservercentral.com/Forums/569962/The-semaphore-timeout-period-has-expired

suggest that it may equally well be a hardware issue or actual timeout.

My loops aren't even (they depend on sales level in given month) in terms of time required for each, so good month takes about 20 mins to calculate (query looks at 4 years).

That way it's entirely possible I need to optimise my query. I would even say it's likely, as some changes I did included new tables, which are heaps... So another round of indexing my data before tearing into VM config and hardware tests.

Being aware that this is old question: I'm on SQL Server 2012 SE, SSMS is 2018 Beta and VM the SQL Server runs on has exclusive use of 132GB of RAM (30% total), 8 cores, and 2TB of SSD SAN.

It's suggested that you do not use return false, as 3 things occur as a result:

1. event.preventDefault();
2. event.stopPropagation();
3. Stops callback execution and returns immediately when called.

So in this type of situation, you should really only use event.preventDefault();

Archive of article - jQuery Events: Stop (Mis)Using Return False

This is the one I use:

set statusline=
set statusline+=%7*\[%n]                                  "buffernr
set statusline+=%1*\ %<%F\                                "File+path
set statusline+=%2*\ %y\                                  "FileType
set statusline+=%3*\ %{''.(&fenc!=''?&fenc:&enc).''}      "Encoding
set statusline+=%3*\ %{(&bomb?\",BOM\":\"\")}\            "Encoding2
set statusline+=%4*\ %{&ff}\                              "FileFormat (dos/unix..) 
set statusline+=%5*\ %{&spelllang}\%{HighlightSearch()}\  "Spellanguage & Highlight on?
set statusline+=%8*\ %=\ row:%l/%L\ (%03p%%)\             "Rownumber/total (%)
set statusline+=%9*\ col:%03c\                            "Colnr
set statusline+=%0*\ \ %m%r%w\ %P\ \                      "Modified? Readonly? Top/bot.

Highlight on? function:

function! HighlightSearch()
  if &hls
    return 'H'
  else
    return ''
  endif
endfunction

Colors (adapted from ligh2011.vim):

hi User1 guifg=#ffdad8  guibg=#880c0e
hi User2 guifg=#000000  guibg=#F4905C
hi User3 guifg=#292b00  guibg=#f4f597
hi User4 guifg=#112605  guibg=#aefe7B
hi User5 guifg=#051d00  guibg=#7dcc7d
hi User7 guifg=#ffffff  guibg=#880c0e gui=bold
hi User8 guifg=#ffffff  guibg=#5b7fbb
hi User9 guifg=#ffffff  guibg=#810085
hi User0 guifg=#ffffff  guibg=#094afe

I would use the algorithm detailed in the bug report using System.getenv(String), and fallback to using the user.dir property if none of the environment variables indicated a valid existing directory. This should work cross-platform.

I think, under Windows, what you are really after is the user's notional "documents" directory.

In my case, I just needed to close my pop-up and redirect the user to his profile page when he clicks "ok" after reading some message I tried with a few hacks, including setTimeout + self.close(), but with IE, this was closing the whole tab...

Solution : I replaced my link with a simple submit button.
<button type="submit" onclick="window.location.href='profile.html';">buttonText</button>. Nothing more.

This may sound stupid, but I didn't think to such a simple solution, since my pop-up did not have any form.

I hope it will help some front-end noobs like me !

The problem is that you invoked Undefined Behaviour.

When you invoke UB anything can happen.

The assignments are ok; there is an implicit conversion in the first line

int x = 0xFFFFFFFF;
unsigned int y = 0xFFFFFFFF;

However, the call to printf, is not ok

printf("%d, %d, %u, %u", x, y, x, y);

It is UB to mismatch the % specifier and the type of the argument.
In your case you specify 2 ints and 2 unsigned ints in this order by provide 1 int, 1 unsigned int, 1 int, and 1 unsigned int.

Don't do UB!

Well there's certainly a better implementation of the enum solution (which is generally quite nice):

public enum Error {
  DATABASE(0, "A database error has occurred."),
  DUPLICATE_USER(1, "This user already exists.");

  private final int code;
  private final String description;

  private Error(int code, String description) {
    this.code = code;
    this.description = description;
  }

  public String getDescription() {
     return description;
  }

  public int getCode() {
     return code;
  }

  @Override
  public String toString() {
    return code + ": " + description;
  }
}

You may want to override toString() to just return the description instead - not sure. Anyway, the main point is that you don't need to override separately for each error code. Also note that I've explicitly specified the code instead of using the ordinal value - this makes it easier to change the order and add/remove errors later.

Don't forget that this isn't internationalised at all - but unless your web service client sends you a locale description, you can't easily internationalise it yourself anyway. At least they'll have the error code to use for i18n at the client side...

TRY THIS

As of jQuery version 1.7+, the on() method is the new replacement for the bind(), live() and delegate() methods.

SO ADD THIS,

$(document).on("click", "a.new_participant_form" , function() {
      console.log('clicked');
});

Or for more information CHECK HERE

I was able to screen using the device's name anyway so that wasn't the issue. I was actually just trying to find the port number, i.e. 5331, 5332 etc. I managed to find this by a trial and error process using an app called TCP2Serial from the app store on Mac OS X. It isn't free but that's fine as long as I know it works!

Worth the 99c :) http://itunes.apple.com/us/app/tcp2serial/id506186902?mt=12

The wb indicates that the file is opened for writing in binary mode.

When writing in binary mode, Python makes no changes to data as it is written to the file. In text mode (when the b is excluded as in just w or when you specify text mode with wt), however, Python will encode the text based on the default text encoding. Additionally, Python will convert line endings (\n) to whatever the platform-specific line ending is, which would corrupt a binary file like an exe or png file.

Text mode should therefore be used when writing text files (whether using plain text or a text-based format like CSV), while binary mode must be used when writing non-text files like images.

References:

https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files https://docs.python.org/3/library/functions.html#open

Can i suggest http://www.jqueryscript.net/form/Twitter-Like-Mentions-Auto-Suggesting-Plugin-with-jQuery-Bootstrap-Suggest.html, works more like the twitter post suggestion where it gives you a list of users or topics based on @ or # tags,

view demo here: http://www.jqueryscript.net/demo/Twitter-Like-Mentions-Auto-Suggesting-Plugin-with-jQuery-Bootstrap-Suggest/

in this one you can easily change the @ and # to anything you want

Why don't you just use a singleton?

import android.content.Context;


public class ClassicSingleton {
    private Context c=null;
    private static ClassicSingleton instance = null;
    protected ClassicSingleton()
    {
       // Exists only to defeat instantiation.
    }
    public void setContext(Context ctx)
    {
    c=ctx;
    }
    public Context getContext()
    {
       return c;
    }
    public static ClassicSingleton getInstance()
    {
        if(instance == null) {
            instance = new ClassicSingleton();
        }
        return instance;
    }
}

Then in the activity class:

 private ClassicSingleton cs = ClassicSingleton.getInstance();

And in the non activity class:

ClassicSingleton cs= ClassicSingleton.getInstance();
        Context c=cs.getContext();
        ImageView imageView = (ImageView) ((Activity)c).findViewById(R.id.imageView1);

Import: import java.util.Scanner;

Define your variables: String name; int age;

Define your scanner: Scanner scan = new Scanner(System.in);

If you want to type:

• Text: name = scan.nextLine();
• Integer: age = scan.nextInt();

Close scanner if no longer needed: scan.close();

I prefer to turn the tibble to data.frame. It shows everything and you're done

df %>% data.frame 

Here is a simple AFNetworking POST I'm using. To get up and running after reading the AFNetworking doc, wkiki, ref, etc, I learned a lot by following http://nsscreencast.com/episodes/6-afnetworking and understanding the associated code sample on github.

 // Add this to the class you're working with - (id)init {}
    _netInst = [MyApiClient sharedAFNetworkInstance];

  // build the dictionary that AFNetworkng converts to a json object on the next line
  //  params = {"user":{"email":emailAddress,"password":password}};
  NSDictionary *parameters =[NSDictionary dictionaryWithObjectsAndKeys:
                             userName, @"email", password, @"password", nil];
  NSDictionary *params =[NSDictionary dictionaryWithObjectsAndKeys:
                         parameters, @"user", nil];

   [_netInst postPath: @"users/login.json" parameters:params
      success:^(AFHTTPRequestOperation *operation, id jsonResponse) {
        NSLog (@"SUCCESS");

        // jsonResponse = {"user":{"accessId":1234,"securityKey":"abc123"}};
        _accessId = [jsonResponse valueForKeyPath:@"user.accessid"];
        _securityKey = [jsonResponse valueForKeyPath:@"user.securitykey"];

        return SUCCESS;
      }
      failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"FAILED");

        // handle failure

        return error;
      }
   ];  

Some useful are:

Free:

• Gijgo Grid
• Backgrid.js
• Flexigrid
• jqGridView
• Ingrid
• SlickGrid
• DataTables
• Shield UI Lite Grid

Paid:

• Fancy Grid
• jQuery Grid
• jqxGrid
• Shield UI Grid

The best entries in my opinion are Flexigrid and jQuery Grid.

Note: You can first preview what your patch will do:

First the stats:

git apply --stat a_file.patch

Then a dry run to detect errors:

git apply --check a_file.patch

Finally, you can use git am to apply your patch as a commit. This also allows you to sign off an applied patch.
This can be useful for later reference.

git am --signoff < a_file.patch 

See an example in this article:

In your git log, you’ll find that the commit messages contain a “Signed-off-by” tag. This tag will be read by Github and others to provide useful info about how the commit ended up in the code.

A phpMyAdmin feature called UploadDir permits to upload your file via another mechanism, then importing it from the server's file system. See http://docs.phpmyadmin.net/en/latest/faq.html#i-cannot-upload-big-dump-files-memory-http-or-timeout-problems.

The suggestion from @Dawood is good if that works for you.

If you need more fine-tuning than that, one option is to use padding on the text elements, here's an example: http://jsfiddle.net/panchroma/FtBwe/

CSS

p, h2 {
    padding-left:10px;
}

$.each(top_brands, function() {
  var key = Object.keys(this)[0];
  var value = this[key];
  brand_options.append($("<option />").val(key).text(key + " "  + value));
});

Try using android:state_enabled rather than android:state_selected for the selector item attributes.

Properties expose fields. Fields should (almost always) be kept private to a class and accessed via get and set properties. Properties provide a level of abstraction allowing you to change the fields while not affecting the external way they are accessed by the things that use your class.

public class MyClass
{
    // this is a field.  It is private to your class and stores the actual data.
    private string _myField;

    // this is a property. When accessed it uses the underlying field,
    // but only exposes the contract, which will not be affected by the underlying field
    public string MyProperty
    {
        get
        {
            return _myField;
        }
        set
        {
            _myField = value;
        }
    }

    // This is an AutoProperty (C# 3.0 and higher) - which is a shorthand syntax
    // used to generate a private field for you
    public int AnotherProperty { get; set; } 
}

@Kent points out that Properties are not required to encapsulate fields, they could do a calculation on other fields, or serve other purposes.

@GSS points out that you can also do other logic, such as validation, when a property is accessed, another useful feature.

You can: this is what constructors are for. Also you make it clear that the object is never constructed in an unknown state (without configuration loaded).

You shouldn't: calling instance method in constructor is dangerous because the object is not yet fully initialized (this applies mainly to methods than can be overridden). Also complex processing in constructor is known to have a negative impact on testability.

I would also like to offer an alternative solution to this problem.

Assuming all your keys are numeric without any gaps, my preferred method is to count the array then minus 1 from that value (to account for the fact that array keys start at 0.

$array = array(0=>'dog', 1=>'cat');

$lastKey = count($array)-1;
$lastKeyValue = $array[$lastKey];

var_dump($lastKey);
print_r($lastKeyValue);

This would give you:

int(1) cat

Ad hoc query is type of computer definition. Which means this query is specially design to obtain any information when it is only needed. Predefined. refer this https://www.youtube.com/watch?v=0c8JEKmVXhU

The easiest way to do it, at least for me, is:

Conditional format-> Add new rule->Set your own formula:

=ISNA(MATCH(A2;$B:$B;0))

Where A2 is the first element in column A to be compared and B is the column where A's element will be searched.

Once you have set the formula and picked the format, apply this rule to all elements in the column.

Hope this helps

By default the field delimiter is non-blank to blank transition so tab should work just fine.

However, the columns are indexed base 1 and base 0 so you probably want

sort -k4nr file.txt

to sort file.txt by column 4 numerically in reverse order. (Though the data in the question has even 5 fields so the last field would be index 5.)

Pre-increment means that the variable is incremented BEFORE it's evaluated in the expression. Post-increment means that the variable is incremented AFTER it has been evaluated for use in the expression.

Therefore, look carefully and you'll see that all three assignments are arithmetically equivalent.

add “| pause” in command arguments box under debugging section at project properties.

I have created a function to make the task easier.

• For 7 days after dateString: dateCalculate(dateString,"yyyy-MM-dd",7);

• To get 7 days upto dateString: dateCalculate(dateString,"yyyy-MM-dd",-7);

public static String dateCalculate(String dateString, String dateFormat, int days) {
    Calendar cal = Calendar.getInstance();
    SimpleDateFormat s = new SimpleDateFormat(dateFormat);
    try {
        cal.setTime(s.parse(dateString));
    } catch (ParseException e) {
        e.printStackTrace();
    }
    cal.add(Calendar.DATE, days);
    return s.format(cal.getTime());
}

Here is the typescript version too:

JSONTryParse(input: any) {
    try {
        //check if the string exists
        if (input) {
            var o = JSON.parse(input);

            //validate the result too
            if (o && o.constructor === Object) {
                return o;
            }
        }
    }
    catch (e: any) {
    }

    return false;
};

Do note that using the VisualTreeHelper does only work on controls that derive from Visual or Visual3D. If you also need to inspect other elements (e.g. TextBlock, FlowDocument etc.), using VisualTreeHelper will throw an exception.

Here's an alternative that falls back to the logical tree if necessary:

http://www.hardcodet.net/2009/06/finding-elements-in-wpf-tree-both-ways

use this

 function pnstest(){

                $data = array('post_id'=>'12345','title'=>'A Blog post', 'message' =>'test msg');

                $url = 'https://fcm.googleapis.com/fcm/send';

                $server_key = 'AIzaSyDVpDdS7EyNgMUpoZV6sI2p-cG';

                $target ='fO3JGJw4CXI:APA91bFKvHv8wzZ05w2JQSor6D8lFvEGE_jHZGDAKzFmKWc73LABnumtRosWuJx--I4SoyF1XQ4w01P77MKft33grAPhA8g-wuBPZTgmgttaC9U4S3uCHjdDn5c3YHAnBF3H';

                $fields = array();
                $fields['data'] = $data;
                if(is_array($target)){
                    $fields['registration_ids'] = $target;
                }else{
                    $fields['to'] = $target;
                }

                //header with content_type api key
                $headers = array(
                    'Content-Type:application/json',
                  'Authorization:key='.$server_key
                );

                $ch = curl_init();
                curl_setopt($ch, CURLOPT_URL, $url);
                curl_setopt($ch, CURLOPT_POST, true);
                curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
                curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
                curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
                curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
                $result = curl_exec($ch);
                if ($result === FALSE) {
                    die('FCM Send Error: ' . curl_error($ch));
                }
                curl_close($ch);
                return $result;

}

I'd say they are different concepts but not too different to say "chalk and cheese".

• A temp table is good for re-use or to perform multiple processing passes on a set of data.

• A CTE can be used either to recurse or to simply improved readability.
  And, like a view or inline table valued function can also be treated like a macro to be expanded in the main query

• A temp table is another table with some rules around scope

I have stored procs where I use both (and table variables too)

Ran in to this today.

I wrote some code that looked like this:

app.controller('ctrlr', function($scope, $http){
    $http.get('localhost:3000').success(function(data) {
        $scope.stuff = data;
    });
});

...but it should've looked like this:

app.controller('ctrlr', function($scope, $http){
    $http.get('http://localhost:3000').success(function(data) {
        $scope.stuff = data;
    });
});

The only difference was the lack of http:// in the second snippet of code.

Just wanted to put that out there in case there are others with a similar issue.

In this context components to me sound like isolated runtime portions of an engine that may execute concurrently with other components. If this is the motivation then you might want to look at the actor model and systems that make use of it.

You can follow this tutorial on how to use Google Maps for testing on localhost.

• Click this link and follow the process (create new project, API key > Browser key, register 'localhost' domain): https://console.developers.google.com//flows/enableapi?apiid=maps_backend&keyType=CLIENT_SIDE&reusekey=true
• Generate the key
• Deploy Google Maps widget as described here: http://www2.microstrategy.com/producthelp/10/GISHelp/Lang_1033/GIS_Integration.htm
• Add your Google Maps API key to googleConfig.xml (as desribed in the previous link) ENTER_YOUR_KEY_HERE
• Restart Web Server

Check these related SO threads:

• Google Maps v3 API key won't work for local testing
• How to use google maps simple api on localhost
• Google Maps v3 api for localhost not working

Hope this helps!

I know we have to use regex, but during an interview, I was asked to do WITHOUT USING REGEX.

@slightlytyler helped me in coming with the below approach.

const testStr = "I   LOVE    STACKOVERFLOW   LOL";_x000D_
_x000D_
const removeSpaces = str  => {_x000D_
  const chars = str.split('');_x000D_
  const nextChars = chars.reduce(_x000D_
    (acc, c) => {_x000D_
      if (c === ' ') {_x000D_
        const lastChar = acc[acc.length - 1];_x000D_
        if (lastChar === ' ') {_x000D_
          return acc;_x000D_
        }_x000D_
      }_x000D_
      return [...acc, c];_x000D_
    },_x000D_
    [],_x000D_
  );_x000D_
  const nextStr = nextChars.join('');_x000D_
  return nextStr_x000D_
};_x000D_
_x000D_
console.log(removeSpaces(testStr));

There's one more (at least) road to Rome:

static const char HELLO3[] = "Howdy";

(static — optional — is to prevent it from conflicting with other files). I'd prefer this one over const char*, because then you'll be able to use sizeof(HELLO3) and therefore you don't have to postpone till runtime what you can do at compile time.

The define has an advantage of compile-time concatenation, though (think HELLO ", World!") and you can sizeof(HELLO) as well.

But then you can also prefer const char* and use it across multiple files, which would save you a morsel of memory.

In short — it depends.

Since you need to match content without including it in the result (must match name=" but it's not part of the desired result) some form of zero-width matching or group capturing is required. This can be done easily with the following tools:

Perl

With Perl you could use the n option to loop line by line and print the content of a capturing group if it matches:

perl -ne 'print "$1\n" if /name="(.*?)"/' filename

GNU grep

If you have an improved version of grep, such as GNU grep, you may have the -P option available. This option will enable Perl-like regex, allowing you to use \K which is a shorthand lookbehind. It will reset the match position, so anything before it is zero-width.

grep -Po 'name="\K.*?(?=")' filename

The o option makes grep print only the matched text, instead of the whole line.

Vim - Text Editor

Another way is to use a text editor directly. With Vim, one of the various ways of accomplishing this would be to delete lines without name= and then extract the content from the resulting lines:

:v/.*name="\v([^"]+).*/d|%s//\1

Standard grep

If you don't have access to these tools, for some reason, something similar could be achieved with standard grep. However, without the look around it will require some cleanup later:

grep -o 'name="[^"]*"' filename

A note about saving results

In all of the commands above the results will be sent to stdout. It's important to remember that you can always save them by piping it to a file by appending:

> result

to the end of the command.

As the name suggests, Layout weight specifies what amount or percentage of space a particular field or widget should occupy the screen space.
If we specify weight in horizontal orientation, then we must specify layout_width = 0px.
Similarly, If we specify weight in vertical orientation, then we must specify layout_height = 0px.

The thing with your method is that you clutter your HTML with javascript. If you put your javascript in an external file you can access your HTML unobtrusive and this is much neater.

Lateron you can expand your code with addEventListener/attackEvent(IE) to prevent memory leaks.

This is without jQuery

<a href="123.com" id="elementid">link</a>

window.onload = function () {
  var el = document.getElementById('elementid');
  el.onclick = function (e) {
    var ev = e || window.event;
    // here u can use this or el as the HTML node
  }
}

You say you want to manipulate it with jQuery. So you can use jQuery. Than it is even better to do it like this:

// this is the window.onload startup of your JS as in my previous example. The difference is 
// that you can add multiple onload functions
$(function () {
  $('a#elementid').bind('click', function (e) {
    // "this" points to the <a> element
    // "e" points to the event object
  });
});

You can concatenate Strings using the + operator:

String a="hello ";
String b="world.";
System.out.println(a+b);

Output:

hello world.

That's it

You can use safe substring:

org.apache.commons.lang3.StringUtils.substring(str, 0, LENGTH);

When adding datepicker at runtime generated input textboxes you have to check if it already contains datepicker then first remove class hasDatepicker then apply datePicker to it.

function convertTxtToDate() {
        $('.dateTxt').each(function () {
            if ($(this).hasClass('hasDatepicker')) {
                $(this).removeClass('hasDatepicker');
            } 
             $(this).datepicker();
        });
    } 

Probably the simplest way to do this is ->

import os
os.chdir("X:\Enter location of .bat file")
os.startfile("ask.bat")

Something that may get missed: in my chaining project, it turns out a space separated list also needs a space separated semicolon at the end.

In other words, this doesn't work:

transform: translate(50%, 50%) rotate(90deg);

but this does:

transform: translate(50%, 50%) rotate(90deg) ; //has a space before ";"

execute command as follows :

docker run -t -d <image-name>

if you want to specify port then command as below:

docker run -t -d -p <port-no> <image-name>

verify the running container using following command:

docker ps

None of the answers solved exactly my problem (the solution file I was running was trying to find xcopy to copy a dll after generation).

What solved it for me was going into menu "Project -> Properties"

Then in the window that opens choosing on the left pane: "Configuration Properties -> VC++ Directories

On the right pane under "General" choosing "Executable Directories "

And then adding:

$(SystemRoot)\system32;$(SystemRoot);$(SystemRoot)\System32\Wbem;$(SystemRoot)\System32\WindowsPowerShell\v1.0\;$(ExecutablePath)

You have to use $_POST['date'] instead of $date if it's coming from a POST request ($_GET if it's a GET request).

You could use LINQ... it eliminates the need to check string length. Admittedly maybe not the most efficient, but it's fun.

string result = string.Join("", value.Take(maxLength)); // .NET 4 Join

or

string result = new string(value.Take(maxLength).ToArray());

yes a constructor can be private. A private Constructor prevents any other class from instantiating example of private constructor

public class CustomHttpClient {
private static HttpClient customHttpClient;

/** A private Constructor prevents any other class from instantiating. */
private CustomHttpClient() {
}}

This command count number of non-blank lines.
cat fileName | grep -v ^$ | wc -l
grep -v ^$ regular expression function is ignore blank lines.

I had same problem as yours, but my concern was list view. When i try to scroll list view fixed header also scroll little bit. Problem was list view height smaller than viewport (browser) height. You just need to reduce your viewport height lower than content tag (list view within content tag) height. Here is my meta tag;

<meta name="viewport" content="width=device-width,height=90%,  user-scalable = no"> 

Hope this will help.Thnks.

According to the flask.Request.args documents.

flask.Request.args
A MultiDict with the parsed contents of the query string. (The part in the URL after the question mark).

So the args.get() is method get() for MultiDict, whose prototype is as follows:

get(key, default=None, type=None)

Update:
In newer version of flask (v1.0.x and v1.1.x), flask.Request.args is an ImmutableMultiDict(an immutable MultiDict), so the prototype and specific method above is still valid.

I am opening user controls depending on what user controls the user have access to specified in a database. So I used this method to get the TypeName...

Dim strType As String = GetType(Namespace.ClassName).AssemblyQualifiedName.ToString
Dim obj As UserControl = Activator.CreateInstance(Type.GetType(strType))

So now one can use the value returned in strType to create an instance of that object.

Error is because you didn't updated that particular file, first update then only you can commit the file.

it means that the type used as T when the generic method is used must be a class - i.e. it cannot be a struct or built in number like int or double

// Valid:
var myStringList = DoThis<string>();
// Invalid - compile error
var myIntList = DoThis<int>();

You can. I'm using the following lines in a StackExchange Data Explorer query:

SELECT
(SELECT COUNT(*) FROM VotesOnPosts WHERE VoteTypeName = 'UpMod' AND UserId = @UserID AND PostTypeId = 2) AS TotalUpVotes,
(SELECT COUNT(*) FROM Answers WHERE UserId = @UserID) AS TotalAnswers

The Data Exchange uses Transact-SQL (the SQL Server proprietary extensions to SQL).

You can try it yourself by running a query like:

SELECT 'Hello world'

If you are not going to use the NumPy library, you can use the nested list. This is code to implement the dynamic nested list (2-dimensional lists).

Let r is the number of rows

let r=3

m=[]
for i in range(r):
    m.append([int(x) for x in raw_input().split()])

Any time you can append a row using

m.append([int(x) for x in raw_input().split()])

Above, you have to enter the matrix row-wise. To insert a column:

for i in m:
    i.append(x) # x is the value to be added in column

To print the matrix:

print m       # all in single row

for i in m:
    print i   # each row in a different line

That's because these things (I mean tooltip etc) are jQuery plug-ins. And yes, they assume some basic knowledge about jQuery. I would suggest you to look for at least a basic tutorial about jQuery.

You'll always have to define which elements should have a tooltip. And I don't understand why Bootstrap should provide the class, you define those classes or yourself. Maybe you were hoping that bootstrap did automatically some magic? This magic however, can cause a lot of problems as well (unwanted side effects).

This magic can be easily achieved to just write $(".myclass").tooltip(), this line of code does exact what you want. The only thing you have to do is attach the myclass class to those elements that need to apply the tooltip thingy. (Just make sure you run that line of code after your DOM has been loaded. See below.)

$(document).ready(function() {
    $(".myclass").tooltip();
});

EDIT: apparently you can't use the class tooltip (probably because it is somewhere internally used!).

I'm just wondering why bootstrap doesn't run the code you specified with some class I can include.

The thing you want produces almost the same code as you have to do now. The biggest reason however they did not do that, is because it causes a lot of trouble. One person wants to assign it to an element with an ID; others want to assign it to elements with a specified classname; and again others want to assign it to one specified element achieved through some selection process. Those 3 options cause extra complexity, while it is already provided by jQuery. I haven't seen many plugins do what you want (just because it is needless; it really doesn't save you code).

for me this worked

RewriteEngine on
RewriteCond %{HTTP:X-Forwarded-Proto} !https
RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R=301,L]

TL;DR) See this table: https://www.tensorflow.org/install/source#gpu

Generally:

Check the CUDA version:

cat /usr/local/cuda/version.txt

and cuDNN version:

grep CUDNN_MAJOR -A 2 /usr/local/cuda/include/cudnn.h

and install a combination as given below in the images or here.

The following images and the link provide an overview of the officially supported/tested combinations of CUDA and TensorFlow on Linux, macOS and Windows:

Minor configurations:

Since the given specifications below in some cases might be too broad, here is one specific configuration that works:

• tensorflow-gpu==1.12.0
• cuda==9.0
• cuDNN==7.1.4

The corresponding cudnn can be downloaded here.

Tested build configurations

Please refer to https://www.tensorflow.org/install/source#gpu for a up-to-date compatibility chart (for official TF wheels).

(figures updated May 20, 2020)

Linux GPU

Linux CPU

macOS GPU

macOS CPU

Windows GPU

Windows CPU

Updated as of Dec 5 2020: For the updated information please refer Link for Linux and Link for Windows.

I also banged my head around this problem for some time and wished to solve this in an elegant but quick way.

Here are my 20 cents:

• The answer using labels as mentioned here won't work if you are updating labels. But would work if you always add labels. More details here.

• The answer mentioned here is the most elegant way to do this quickly according to me but had the problem of handling deletes. I am adding on to this answer:

Solution

I am doing this in one of the Kubernetes Operator where only a single task is performed in one reconcilation loop.

• Compute the hash of the config map data. Say it comes as v2.
• Create ConfigMap cm-v2 having labels: version: v2 and product: prime if it does not exist and RETURN. If it exists GO BELOW.
• Find all the Deployments which have the label product: prime but do not have version: v2, If such deployments are found, DELETE them and RETURN. ELSE GO BELOW.
• Delete all ConfigMap which has the label product: prime but does not have version: v2 ELSE GO BELOW.
• Create Deployment deployment-v2 with labels product: prime and version: v2 and having config map attached as cm-v2 and RETURN, ELSE Do nothing.

That's it! It looks long, but this could be the fastest implementation and is in principle with treating infrastructure as Cattle (immutability).

Also, the above solution works when your Kubernetes Deployment has Recreate update strategy. Logic may require little tweaks for other scenarios.

For people looking for getting text that is both centered and justified, the following should work:

<div class="center-justified">...lots and lots of text...</div>

With the following CSS rule (adjust the width property as needed):

.center-justified {
  text-align: justify;
  margin: 0 auto;
  width: 30em;
}

Here's the live demo.

What's going on?

1. text-align: justify; makes sure the text fills the full width of the div it is enclosed in.
2. margin: 0 auto; is actually a shorthand for four rules:
   • The first value is used for the margin-top and margin-bottom rules. The whole thing therefore means margin-top: 0; margin-bottom: 0, i.e. no margins above or below the div.
   • The second value is used for the margin-left and margin-right rules. So this rule results in margin-left: auto; margin-right: auto. This is the clever bit: it tells the browser to take whatever space is available on the sides and distribute it evenly on left and right. The result is centered text.
     However, this would not work without
3. width: 30em;, which limits the width of the div. Only when the width is restricted is there some whitespace left over for margin: auto to distribute. Without this rule the div would take up all available horizontal space, and you'd lose the centering effect.

There is no subtyping relationship between arrays of primitive type, or between an array of a primitive type and array of a reference type. See JLS 4.10.3.

Therefore, the following is incorrect as a test to see if obj is an array of any kind:

// INCORRECT!
public boolean isArray(final Object obj) {
    return obj instanceof Object[];
}

Specifically, it doesn't work if obj is 1-D array of primitives. (It does work for primitive arrays with higher dimensions though, because all array types are subtypes of Object. But it is moot in this case.)

I use Google GWT so I am not allowed to use reflection :(

The best solution (to the isArray array part of the question) depends on what counts as "using reflection".

• In GWT, calling obj.getClass().isArray() does not count as using reflection¹, so that is the best solution.

• Otherwise, the best way of figuring out whether an object has an array type is to use a sequence of instanceof expressions.

  public boolean isArray(final Object obj) {
      return obj instanceof Object[] || obj instanceof boolean[] ||
         obj instanceof byte[] || obj instanceof short[] ||
         obj instanceof char[] || obj instanceof int[] ||
         obj instanceof long[] || obj instanceof float[] ||
         obj instanceof double[];
  }
  

• You could also try messing around with the name of the object's class as follows, but the call to obj.getClass() is bordering on reflection.

  public boolean isArray(final Object obj) {
      return obj.getClass().toString().charAt(0) == '[';
  }
  

^{1 - More precisely, the Class.isArray method is listed as supported by GWT in this page.}

Maybe you can just generate the sample of indices and then collect the items from your list.

randIndex = random.sample(range(len(mylist)), sample_size)
randIndex.sort()
rand = [mylist[i] for i in randIndex]

I used the advice from this article to get an assembly from the GAC.

Get DLL Out of The GAC

DLLs once deployed in GAC (normally located at c:\windows\assembly) can’t be viewed or used as a normal DLL file. They can’t be directly referenced from VS project. Developers usually keep a copy of the original DLL file and refer to it in the project at development (design) time, which uses the assembly from GAC during run-time of the project.

During execution (run-time) if the assembly is found to be signed and deployed in GAC the CLR automatically picks up the assembly from the GAC instead of the DLL referenced during design time in VS. In case the developer has deleted the original DLL or don't have it for some reason, there is a way to get the DLL file from GAC. Follow the following steps to copy DLL from GAC

1. Run regsvr32 /u C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\shfusion.dll

   • shfusion.dll is an explorer extension DLL that gives a distinct look to the GAC folder. Unregistering this file will remove the assembly cache viewer and the GAC folder will be then visible as any normal folder in explorer.

2. Open “%windir%\assembly\GAC_MSIL”.

3. Browse to your DLL folder into the deep to find your DLL.

4. Copy the DLL somewhere on your hard disk and refer it from there in your project

5. Run "regsvr32 %windir%\Microsoft.NET\Framework\<.NET version directory> \shfusion.dll" to re-register the shfusion.dll file and regain the original distinct view of the GAC.

For a simple string with space delimitation, using Dict would be quite fast, please see the code as below

def getStringCount(mnstr:str, sbstr:str='')->int:
    """ Assumes two inputs string giving the string and 
        substring to look for number of occurances 
        Returns the number of occurances of a given string
    """
    x = dict()
    x[sbstr] = 0
    sbstr = sbstr.strip()
    for st in mnstr.split(' '):
        if st not in [sbstr]:
            continue
        try:
            x[st]+=1
        except KeyError:
            x[st] = 1
    return x[sbstr]

s = 'foo bar foo test one two three foo bar'
getStringCount(s,'foo')

The ListAvailable option doesn't work for me. Instead this does:

if (-not (Get-Module -Name "<moduleNameHere>")) {
    # module is not loaded
}

Or, to be more succinct:

if (!(Get-Module "<moduleNameHere>")) {
    # module is not loaded
}

You can use like below -

this.setState(() => ({  subChartType1: value   }), () => this.props.dispatch(setChartData(null)));

I realised that I hadn't run/built my framework with the Generic Device, which strangely lead to these issues. I just put the framework back in and it worked.

    
_x000D_
_x000D_
    /* add javascript*/_x000D_
    {_x000D_
    document.getElementById('abc 1').style.display='none';_x000D_
    }_x000D_
   /* after that add html*/_x000D_
   
_x000D_
    <html>_x000D_
    <head>_x000D_
    <title>...</title>_x000D_
    </head>_x000D_
    <body>_x000D_
    <table border = 2>_x000D_
    <tr id = "abc 1">_x000D_
    <td>abcd</td>_x000D_
    </tr>_x000D_
    <tr id ="abc 2">_x000D_
    <td>efgh</td>_x000D_
    </tr>_x000D_
    </table>_x000D_
    </body>_x000D_
    </html>_x000D_
_x000D_
    
_x000D_
_x000D_
_x000D_

You can use this:

var element = document.getElementById('txt');
var text = element.innerText || element.textContent;
element.innerHTML = text;

Depending on what you need, you can use either element.innerText or element.textContent. They differ in many ways. innerText tries to approximate what would happen if you would select what you see (rendered html) and copy it to the clipboard, while textContent sort of just strips the html tags and gives you what's left.

innerText also has compatability with old IE browsers (came from there).

answer for me was to fix a gridview control which contained a template field that had a dropdownlist which was loaded with a monstrous amount of selectable items- i replaced the DDL with a label field whose data is generated from a function. (i was originally going to allow gridview editing, but have switched to allowing edits on a separate panel displaying the DDL for that field for just that record). hope this might help someone.

I am looking for this kind of solution for my self as well. I found reference in terms aggregation.

So, according to that following is the proper solution.

{
"aggs" : {
    "langs" : {
        "terms" : { "field" : "language",  
                    "size" : 500 }
    }
}}

But if you ran into following error:

"error": {
        "root_cause": [
            {
                "type": "illegal_argument_exception",
                "reason": "Fielddata is disabled on text fields by default. Set fielddata=true on [fastest_method] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead."
            }
        ]}

In that case, you have to add "KEYWORD" in the request, like following:

   {
    "aggs" : {
        "langs" : {
            "terms" : { "field" : "language.keyword",  
                        "size" : 500 }
        }
    }}

The border styling is set on the td elements.

html:

<table class='table borderless'>

css:

.borderless td, .borderless th {
    border: none;
}

Update: Since Bootstrap 4.1 you can use .table-borderless to remove the border.

https://getbootstrap.com/docs/4.1/content/tables/#borderless-table

The DataSet object has a Tables array. If you know the table you want, it will have a Row array, each object of which has an ItemArray array. In your case the code would most likely be

int var1 = int.Parse(ds.Tables[0].Rows[0].ItemArray[4].ToString());

and so forth. This would give you the 4th item in the first row. You can also use Columns instead of ItemArray and specify the column name as a string instead of remembering it's index. That approach can be easier to keep up with if the table structure changes. So that would be

int var1 = int.Parse(ds.Tables[0].Rows[0]["MyColumnName"].ToString());

With perl and Linux::Distribution, the cleanest solution for an old problem :

#!/bin/sh

perl -e '
    use Linux::Distribution qw(distribution_name distribution_version);

    my $linux = Linux::Distribution->new;
    if(my $distro = $linux->distribution_name()) {
          my $version = $linux->distribution_version();
          print "you are running $distro";
          print " version $version" if $version;
          print "\n";
    } else {
          print "distribution unknown\n";
    }
'

Returning an empty collection is better in most cases.

The reason for that is convenience of implementation of the caller, consistent contract, and easier implementation.

If a method returns null to indicate empty result, the caller must implement a null checking adapter in addition to enumeration. This code is then duplicated in various callers, so why not to put this adapter inside the method so it could be reused.

A valid usage of null for IEnumerable might be an indication of absent result, or an operation failure, but in this case other techniques should be considered, such as throwing an exception.

using System;
using System.Collections.Generic;
using System.Linq;
using NUnit.Framework;

namespace StackOverflow.EmptyCollectionUsageTests.Tests
{
    /// <summary>
    /// Demonstrates different approaches for empty collection results.
    /// </summary>
    class Container
    {
        /// <summary>
        /// Elements list.
        /// Not initialized to an empty collection here for the purpose of demonstration of usage along with <see cref="Populate"/> method.
        /// </summary>
        private List<Element> elements;

        /// <summary>
        /// Gets elements if any
        /// </summary>
        /// <returns>Returns elements or empty collection.</returns>
        public IEnumerable<Element> GetElements()
        {
            return elements ?? Enumerable.Empty<Element>();
        }

        /// <summary>
        /// Initializes the container with some results, if any.
        /// </summary>
        public void Populate()
        {
            elements = new List<Element>();
        }

        /// <summary>
        /// Gets elements. Throws <see cref="InvalidOperationException"/> if not populated.
        /// </summary>
        /// <returns>Returns <see cref="IEnumerable{T}"/> of <see cref="Element"/>.</returns>
        public IEnumerable<Element> GetElementsStrict()
        {
            if (elements == null)
            {
                throw new InvalidOperationException("You must call Populate before calling this method.");
            }

            return elements;
        }

        /// <summary>
        /// Gets elements, empty collection or nothing.
        /// </summary>
        /// <returns>Returns <see cref="IEnumerable{T}"/> of <see cref="Element"/>, with zero or more elements, or null in some cases.</returns>
        public IEnumerable<Element> GetElementsInconvenientCareless()
        {
            return elements;
        }

        /// <summary>
        /// Gets elements or nothing.
        /// </summary>
        /// <returns>Returns <see cref="IEnumerable{T}"/> of <see cref="Element"/>, with elements, or null in case of empty collection.</returns>
        /// <remarks>We are lucky that elements is a List, otherwise enumeration would be needed.</remarks>
        public IEnumerable<Element> GetElementsInconvenientCarefull()
        {
            if (elements == null || elements.Count == 0)
            {
                return null;
            }
            return elements;
        }
    }

    class Element
    {
    }

    /// <summary>
    /// http://stackoverflow.com/questions/1969993/is-it-better-to-return-null-or-empty-collection/
    /// </summary>
    class EmptyCollectionTests
    {
        private Container container;

        [SetUp]
        public void SetUp()
        {
            container = new Container();
        }

        /// <summary>
        /// Forgiving contract - caller does not have to implement null check in addition to enumeration.
        /// </summary>
        [Test]
        public void UseGetElements()
        {
            Assert.AreEqual(0, container.GetElements().Count());
        }

        /// <summary>
        /// Forget to <see cref="Container.Populate"/> and use strict method.
        /// </summary>
        [Test]
        [ExpectedException(typeof(InvalidOperationException))]
        public void WrongUseOfStrictContract()
        {
            container.GetElementsStrict().Count();
        }

        /// <summary>
        /// Call <see cref="Container.Populate"/> and use strict method.
        /// </summary>
        [Test]
        public void CorrectUsaOfStrictContract()
        {
            container.Populate();
            Assert.AreEqual(0, container.GetElementsStrict().Count());
        }

        /// <summary>
        /// Inconvenient contract - needs a local variable.
        /// </summary>
        [Test]
        public void CarefulUseOfCarelessMethod()
        {
            var elements = container.GetElementsInconvenientCareless();
            Assert.AreEqual(0, elements == null ? 0 : elements.Count());
        }

        /// <summary>
        /// Inconvenient contract - duplicate call in order to use in context of an single expression.
        /// </summary>
        [Test]
        public void LameCarefulUseOfCarelessMethod()
        {
            Assert.AreEqual(0, container.GetElementsInconvenientCareless() == null ? 0 : container.GetElementsInconvenientCareless().Count());
        }

        [Test]
        public void LuckyCarelessUseOfCarelessMethod()
        {
            // INIT
            var praySomeoneCalledPopulateBefore = (Action)(()=>container.Populate());
            praySomeoneCalledPopulateBefore();

            // ACT //ASSERT
            Assert.AreEqual(0, container.GetElementsInconvenientCareless().Count());
        }

        /// <summary>
        /// Excercise <see cref="ArgumentNullException"/> because of null passed to <see cref="Enumerable.Count{TSource}(System.Collections.Generic.IEnumerable{TSource})"/>
        /// </summary>
        [Test]
        [ExpectedException(typeof(ArgumentNullException))]
        public void UnfortunateCarelessUseOfCarelessMethod()
        {
            Assert.AreEqual(0, container.GetElementsInconvenientCareless().Count());
        }

        /// <summary>
        /// Demonstrates the client code flow relying on returning null for empty collection.
        /// Exception is due to <see cref="Enumerable.First{TSource}(System.Collections.Generic.IEnumerable{TSource})"/> on an empty collection.
        /// </summary>
        [Test]
        [ExpectedException(typeof(InvalidOperationException))]
        public void UnfortunateEducatedUseOfCarelessMethod()
        {
            container.Populate();
            var elements = container.GetElementsInconvenientCareless();
            if (elements == null)
            {
                Assert.Inconclusive();
            }
            Assert.IsNotNull(elements.First());
        }

        /// <summary>
        /// Demonstrates the client code is bloated a bit, to compensate for implementation 'cleverness'.
        /// We can throw away the nullness result, because we don't know if the operation succeeded or not anyway.
        /// We are unfortunate to create a new instance of an empty collection.
        /// We might have already had one inside the implementation,
        /// but it have been discarded then in an effort to return null for empty collection.
        /// </summary>
        [Test]
        public void EducatedUseOfCarefullMethod()
        {
            Assert.AreEqual(0, (container.GetElementsInconvenientCarefull() ?? Enumerable.Empty<Element>()).Count());
        }
    }
}

@tom-studee you were right, it's possible to do it in the data modeler.

Double click your table, then go to the column section. Here double click on the column which will have the auto increment. In the general section there is a checkbox "autoincrement", just tick it.

After that you can also go to the "autoincrement" section to customize it.

When you save it and ask the data modeler to generate the SQL script, you will see the sequence and trigger which represent your autoincrement.

Use COPY table TO ... WITH BINARY which is according to the documentation is "somewhat faster than the text and CSV formats." Only do this if you have millions of rows to insert, and if you are comfortable with binary data.

Here is an example recipe in Python, using psycopg2 with binary input.

export const authHandler = (config) => {
  const authRegex = /^\/apiregex/;

  if (!authRegex.test(config.url)) {
    return store.fetchToken().then((token) => {
      Object.assign(config.headers.common, { Authorization: `Bearer ${token}` });
      return Promise.resolve(config);
    });
  }
  return Promise.resolve(config);
};

axios.interceptors.request.use(authHandler);

Ran into some gotchas when trying to implement something similar and based on these answers this is what I came up with. The problems I was experiencing were:

1. If using axios for the request to get a token in your store, you need to detect the path before adding the header. If you don't, it will try to add the header to that call as well and get into a circular path issue. The inverse of adding regex to detect the other calls would also work
2. If the store is returning a promise, you need to return the call to the store to resolve the promise in the authHandler function. Async/Await functionality would make this easier/more obvious
3. If the call for the auth token fails or is the call to get the token, you still want to resolve a promise with the config

I had the same issue and I found that this happened after I installed an update for my SQL 2012. What fixed it for me was going into programs and features and running a repair on it.

You could use former Instantiations product CodePro AnalytiX. This eclipse plugin provides you suchlike statistics in code metrics view. This is provided by Google free of charge.

In your invocation, the two functions are the same.

average can compute a weighted average though.

Doc links: mean and average

The solution depends on a few things.

Is the default value dependent on other information available at creation time? Can you wipe the database with minimal consequences?

If you answered the first question yes, then you want to use Jim's solution

If you answered the second question yes, then you want to use Daniel's solution

If you answered no to both questions, you're probably better off adding and running a new migration.

class AddDefaultMigration < ActiveRecord::Migration
  def self.up
     change_column :tasks, :status, :string, :default => default_value, :null => false
  end
end

:string can be replaced with any type that ActiveRecord::Migration recognizes.

CPU is cheap so the redefinition of Task in Jim's solution isn't going to cause many problems. Especially in a production environment. This migration is proper way of doing it as it is loaded it and called much less often.

There is a lot more to coalesce than just a replacement for ISNULL. I completely agree that the official "documentation" of coalesce is vague and unhelpful. This article helps a lot. http://www.mssqltips.com/sqlservertip/1521/the-many-uses-of-coalesce-in-sql-server/

I had the same error. It is solved by following steps

Go to IIS -> find your site -> right click on the site -> Manage Website -> Advanced Setting -> Check your physical path is correct or not.

If it is wrong, locate the correct path. This will solve issue.

This works (I feel so idiotic):

C:\Windows\System32\cmd.exe /C runas /savecred /user:OtherUser DebugTarget.Exe

The above command will ask for your password everytime, so for less frustration, you can use /savecred. You get asked only once. (but works only for Home Edition and Starter, I think)

I found your question looking for a solution to the same problem; and what other answers fail to point is a way to use a variable to change the name of the table for every execution of your procedure in a permanent form, not temporary.

So far what I do is concatenate the entire SQL code with the variables to use. Like this:

declare @table_name as varchar(30)
select @table_name = CONVERT(varchar(30), getdate(), 112)
set @table_name = 'DAILY_SNAPSHOT_' + @table_name

EXEC('
        SELECT var1, var2, var3
        INTO '+@table_name+'
        FROM my_view
        WHERE string = ''Strings must use double apostrophe''
    ');

I hope it helps, but it could be cumbersome if the code is too large, so if you've found a better way, please share!

Before the launch of Java SE 7 we were habitual of writing code with multiple catch statements associated with a try block. A very basic Example:

 try {
  // some instructions
} catch(ATypeException e) {
} catch(BTypeException e) {
} catch(CTypeException e) {
}

But now with the latest update on Java, instead of writing multiple catch statements we can handle multiple exceptions within a single catch clause. Here is an example showing how this feature can be achieved.

try {
// some instructions
} catch(ATypeException|BTypeException|CTypeException ex) {
   throw e;
}

So multiple Exceptions in a single catch clause not only simplifies the code but also reduce the redundancy of code. I found this article which explains this feature very well along with its implementation. Improved and Better Exception Handling from Java 7 This may help you too.

You obviously use mutex to lock a data in one thread getting accessed by another thread at the same time. Assume that you have just called lock() and in the process of accessing data. This means that you don’t expect any other thread (or another instance of the same thread-code) to access the same data locked by the same mutex. That is, if it is the same thread-code getting executed on a different thread instance, hits the lock, then the lock() should block the control flow there. This applies to a thread that uses a different thread-code, which is also accessing the same data and which is also locked by the same mutex. In this case, you are still in the process of accessing the data and you may take, say, another 15 secs to reach the mutex unlock (so that the other thread that is getting blocked in mutex lock would unblock and would allow the control to access the data). Do you at any cost allow yet another thread to just unlock the same mutex, and in turn, allow the thread that is already waiting (blocking) in the mutex lock to unblock and access the data? Hope you got what I am saying here? As per, agreed upon universal definition!,

• with “mutex” this can’t happen. No other thread can unlock the lock in your thread
• with “binary-semaphore” this can happen. Any other thread can unlock the lock in your thread

So, if you are very particular about using binary-semaphore instead of mutex, then you should be very careful in “scoping” the locks and unlocks. I mean that every control-flow that hits every lock should hit an unlock call, also there shouldn’t be any “first unlock”, rather it should be always “first lock”.

To ignore all subdirectories you can simply use:

**/

This works as of version 1.8.2 of git.

The code is correct so I'm guessing that you are using an older JDK. The javadoc for that method says it has been there since 1.6. At the command line type:

java -version

I'm guessing that you are not running 1.6