Hiding the address bar of a browser (popup)

What is the truth?

Microsoft's documentation describing the behaviour of their browser is correct.

Is there any solution to hide the addressbar?

No. If you could hide it, then you could use HTML/CSS to make something that looked like a common address bar. You could then put a different address in it. You could then trick people into thinking they were on a different site and entering their password for it.

It is impossible to conceal the user's location from them because it is essential for security that they know what their location is.

What is the string concatenation operator in Oracle?

I would suggest concat when dealing with 2 strings, and || when those strings are more than 2:

select concat(a,b)
  from dual

  select 'a'||'b'||'c'||'d'
        from dual

How to fix committing to the wrong Git branch?

For me, this was solved by reverting the commit I had pushed, then cherry-picking that commit to the other branch.

git checkout branch_that_had_the_commit_originally
git revert COMMIT-HASH
git checkout branch_that_was_supposed_to_have_the_commit
git cherry pick COMMIT-HASH

You can use git log to find the correct hash, and you can push these changes whenever you like!

Convert and format a Date in JSP

The example above showing the import with ...sun.com/jsp/jstl/format is incorrect (meaning it didn't work for me).

Instead try the below -this import statement is valid

<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %><%@ taglib uri="http://java.sun.com/jstl/core-rt" prefix="c-rt" %><%@ taglib uri="http://java.sun.com/jstl/fmt" prefix="fmt" %>
<html>
  <head>
    <title>Format Date</title>
  </head>

  <body>
    <c-rt:set var="now" value="<%=new java.util.Date()%>" />

    <table border="1" cellpadding="0" cellspacing="0"
    style="border-collapse: collapse" bordercolor="#111111"
    width="63%" id="AutoNumber2">
      <tr>
        <td width="100%" colspan="2" bgcolor="#0000FF">
          <p align="center">
            <b>
              <font color="#FFFFFF" size="4">Formatting: 
              <fmt:formatDate value="${now}" type="both"
              timeStyle="long" dateStyle="long" />
              </font>
            </b>
          </p>
        </td>
      </tr>

How to get duplicate items from a list using LINQ?

Here is one way to do it:

List<String> duplicates = lst.GroupBy(x => x)
                             .Where(g => g.Count() > 1)
                             .Select(g => g.Key)
                             .ToList();

The GroupBy groups the elements that are the same together, and the Where filters out those that only appear once, leaving you with only the duplicates.

Clear and reset form input fields

You can also do it by targeting the current input, with anything.target.reset() . This is the most easiest way!

handleSubmit(e){
 e.preventDefault();
 e.target.reset();
}

<form onSubmit={this.handleSubmit}>
  ...
</form>

How to read the post request parameters using JavaScript

If you're working with a Java / REST API, a workaround is easy. In the JSP page you can do the following:

    <%
    String action = request.getParameter("action");
    String postData = request.getParameter("dataInput");
    %>
    <script>
        var doAction = "<% out.print(action); %>";
        var postData = "<% out.print(postData); %>";
        window.alert(doAction + " " + postData);
    </script>

Showing which files have changed between two revisions

Also keep in mind that git has cheap and easy branching. If I think a merge could be problematic I create a branch for the merge. So if master has the changes I want to merge in and ba is my branch that needs the code from master I might do the following:

git checkout ba
git checkout -b ba-merge
git merge master
.... review new code and fix conflicts....
git commit
git checkout ba
git merge ba-merge
git branch -d ba-merge
git merge master

End result is that I got to try out the merge on a throw-away branch before screwing with my branch. If I get my self tangled up I can just delete the ba-merge branch and start over.

How to write "Html.BeginForm" in Razor

The following code works fine:

@using (Html.BeginForm("Upload", "Upload", FormMethod.Post, 
                                      new { enctype = "multipart/form-data" }))
{
    @Html.ValidationSummary(true)
    <fieldset>
        Select a file <input type="file" name="file" />
        <input type="submit" value="Upload" />
    </fieldset>
}

and generates as expected:

<form action="/Upload/Upload" enctype="multipart/form-data" method="post">    
    <fieldset>
        Select a file <input type="file" name="file" />
        <input type="submit" value="Upload" />
    </fieldset>
</form>

On the other hand if you are writing this code inside the context of other server side construct such as an if or foreach you should remove the @ before the using. For example:

@if (SomeCondition)
{
    using (Html.BeginForm("Upload", "Upload", FormMethod.Post, 
                                      new { enctype = "multipart/form-data" }))
    {
        @Html.ValidationSummary(true)
        <fieldset>
            Select a file <input type="file" name="file" />
            <input type="submit" value="Upload" />
        </fieldset>
    }
}

As far as your server side code is concerned, here's how to proceed:

[HttpPost]
public ActionResult Upload(HttpPostedFileBase file) 
{
    if (file != null && file.ContentLength > 0) 
    {
        var fileName = Path.GetFileName(file.FileName);
        var path = Path.Combine(Server.MapPath("~/content/pics"), fileName);
        file.SaveAs(path);
    }
    return RedirectToAction("Upload");
}

Insert line break inside placeholder attribute of a textarea?

I don't like hiding the placeholder when you focus the textarea. So I made a constructor function Placeholder that looks exactly like the built-in placeholder and works also in other browsers than Google Chrome. It's very convenient because you can use the Placeholder function as often as you want and it doesn't even need jQuery.

EDIT:

It now also handles special cases, like inserting the placeholder, correctly.

_x000D_

var textarea = document.getElementById("textarea");_x000D_
new Placeholder(textarea, "Line 1\nLine 2\nLine 3");_x000D_
_x000D_
function Placeholder(el, placeholder) {_x000D_
    if (el.value == "" || el.value == placeholder) {_x000D_
        el.style.color = "gray";_x000D_
        el.value = placeholder;_x000D_
        el._plc = true;_x000D_
        el.className += " unselectable";_x000D_
    }_x000D_
    function keyPress(e) {_x000D_
        window.setTimeout(function() {_x000D_
            var replaced = reverseStr(el.value).replace(reverseStr(placeholder), "");_x000D_
            _x000D_
            if (el.value == "") {_x000D_
                el.value = placeholder;_x000D_
                el.style.color = "gray";_x000D_
                cursorToStart(el);_x000D_
                el._plc = true;_x000D_
                el.className += " unselectable";_x000D_
            } else if (el._plc && el.value.endsWith(placeholder) && replaced !== "") {_x000D_
                el.value = reverseStr(replaced);_x000D_
                el.style.color = "black";_x000D_
                el._plc = false;_x000D_
                el.readOnly = false;_x000D_
                el.className = el.className.replace("unselectable", "");_x000D_
            } else if (el._plc && el.readOnly) {_x000D_
                var ch = String.fromCharCode(e.charCode);_x000D_
                if (e.keyCode == 13) ch = "\n";     // ENTER_x000D_
                else if (e.charCode == 0) return;   // non-character keys_x000D_
                _x000D_
                el.value = ch;_x000D_
                el.style.color = "black";_x000D_
                el._plc = false;_x000D_
                el.readOnly = false;_x000D_
                el.className = el.className.replace("unselectable", "");_x000D_
            }_x000D_
        }, 10);_x000D_
    }_x000D_
    el.addEventListener("keypress", keyPress, false);_x000D_
    el.addEventListener("paste", keyPress, false);_x000D_
    el.addEventListener("cut", keyPress, false);_x000D_
    el.addEventListener("mousedown", function() {_x000D_
        if (el._plc) el.readOnly = true;_x000D_
    }, false);_x000D_
    el.addEventListener("mouseup", function() {_x000D_
        el.readOnly = false;_x000D_
        if (el._plc) cursorToStart(el);_x000D_
    }, false);_x000D_
  _x000D_
    function cursorToStart(input) {_x000D_
        if (input.createTextRange) {_x000D_
            var part = input.createTextRange();_x000D_
            part.move("character", 0);_x000D_
            part.select();_x000D_
        } else if (input.setSelectionRange){_x000D_
            input.setSelectionRange(0, 0);_x000D_
        } input.focus();_x000D_
    }_x000D_
    function reverseStr(str) {_x000D_
        if (!str) return "";_x000D_
        return str.split("").reverse().join("");_x000D_
    }_x000D_
}

_x000D_

textarea {_x000D_
    border: 1px solid gray;_x000D_
    padding: 3px 6px;_x000D_
    font-family: Arial;_x000D_
    font-size: 13px;_x000D_
    transition: .2s;_x000D_
}_x000D_
textarea:hover, textarea:focus {_x000D_
    border-color: #2277cc;_x000D_
}_x000D_
textarea:focus {_x000D_
    box-shadow: inset 0 0 5px #85B7E9;_x000D_
}_x000D_
*.unselectable {_x000D_
    -webkit-user-select: none;_x000D_
    -webkit-touch-callout: none;_x000D_
    -khtml-user-select: none;_x000D_
    -moz-user-select: none;_x000D_
    -ms-user-select: none;_x000D_
    -o-user-select: none;_x000D_
}

_x000D_

<textarea id="textarea"></textarea>

_x000D_

Angular ng-click with call to a controller function not working

I'm going to guess you aren't getting errors or you would've mentioned them. If that's the case, try removing the href attribute value so the page doesn't navigate away before your code is executed. In Angular it's perfectly acceptable to leave href attributes blank.

<a href="" data-router="article" ng-click="changeListName('metro')">

Also I don't know what data-router is doing but if you still aren't getting the proper result, that could be why.

Daemon not running. Starting it now on port 5037

Reference link: http://www.programering.com/a/MTNyUDMwATA.html

Steps I followed 1) Execute the command adb nodaemon server in command prompt Output at command prompt will be: The following error occurred cannot bind 'tcp:5037' The original ADB server port binding failed

2) Enter the following command query which using port 5037 netstat -ano | findstr "5037" The following information will be prompted on command prompt: TCP 127.0.0.1:5037 0.0.0.0:0 LISTENING 9288

3) View the task manager, close all adb.exe

4) Restart eclipse or other IDE

The above steps worked for me.

What is the preferred Bash shebang?

/bin/sh is usually a link to the system's default shell, which is often bash but on, e.g., Debian systems is the lighter weight dash. Either way, the original Bourne shell is sh, so if your script uses some bash (2nd generation, "Bourne Again sh") specific features ([[ ]] tests, arrays, various sugary things, etc.), then you should be more specific and use the later. This way, on systems where bash is not installed, your script won't run. I understand there may be an exciting trilogy of films about this evolution...but that could be hearsay.

Also note that when evoked as sh, bash to some extent behaves as POSIX standard sh (see also the GNU docs about this).

LDAP root query syntax to search more than one specific OU

The answer is NO you can't. Why?

Because the LDAP standard describes a LDAP-SEARCH as kind of function with 4 parameters:

The node where the search should begin, which is a Distinguish Name (DN)
The attributes you want to be brought back
The depth of the search (base, one-level, subtree)
The filter

You are interested in the filter. You've got a summary here (it's provided by Microsoft for Active Directory, it's from a standard). The filter is composed, in a boolean way, by expression of the type Attribute Operator Value.

So the filter you give does not mean anything.

On the theoretical point of view there is ExtensibleMatch that allows buildind filters on the DN path, but it's not supported by Active Directory.

As far as I know, you have to use an attribute in AD to make the distinction for users in the two OUs.

It can be any existing discriminator attribute, or, for example the attribute called OU which is inherited from organizationalPerson class. you can set it (it's not automatic, and will not be maintained if you move the users) with "staff" for some users and "vendors" for others and them use the filter:

(&(objectCategory=person)(|(ou=staff)(ou=vendors)))

Add a user control to a wpf window

You need to add a reference inside the window tag. Something like:

xmlns:controls="clr-namespace:YourCustomNamespace.Controls;assembly=YourAssemblyName"

(When you add xmlns:controls=" intellisense should kick in to make this bit easier)

Then you can add the control with:

<controls:CustomControlClassName ..... />

Single Form Hide on Startup

static void Main()
{
    Application.EnableVisualStyles();
    Application.SetCompatibleTextRenderingDefault(false);
    MainUIForm mainUiForm = new MainUIForm();
    mainUiForm.Visible = false;
    Application.Run();
}

'No JUnit tests found' in Eclipse

Click 'Run'->choose your JUnit->in 'Test Runner' select the JUnit version you want to run with.

Get the week start date and week end date from week number

This is my solution


    SET DATEFIRST 1;    /* change to use a different datefirst  */
    DECLARE @date DATETIME
    SET @date = CAST('2/6/2019' as date)

    SELECT  DATEADD(dd,0 - (DATEPART(dw, @date) - 1) ,@date) [dateFrom], 
            DATEADD(dd,6 - (DATEPART(dw, @date) - 1) ,@date) [dateTo]

Encode/Decode URLs in C++

[Necromancer mode on]
Stumbled upon this question when was looking for fast, modern, platform independent and elegant solution. Didnt like any of above, cpp-netlib would be the winner but it has horrific memory vulnerability in "decoded" function. So I came up with boost's spirit qi/karma solution.

namespace bsq = boost::spirit::qi;
namespace bk = boost::spirit::karma;
bsq::int_parser<unsigned char, 16, 2, 2> hex_byte;
template <typename InputIterator>
struct unescaped_string
    : bsq::grammar<InputIterator, std::string(char const *)> {
  unescaped_string() : unescaped_string::base_type(unesc_str) {
    unesc_char.add("+", ' ');

    unesc_str = *(unesc_char | "%" >> hex_byte | bsq::char_);
  }

  bsq::rule<InputIterator, std::string(char const *)> unesc_str;
  bsq::symbols<char const, char const> unesc_char;
};

template <typename OutputIterator>
struct escaped_string : bk::grammar<OutputIterator, std::string(char const *)> {
  escaped_string() : escaped_string::base_type(esc_str) {

    esc_str = *(bk::char_("a-zA-Z0-9_.~-") | "%" << bk::right_align(2,0)[bk::hex]);
  }
  bk::rule<OutputIterator, std::string(char const *)> esc_str;
};

The usage of above as following:

std::string unescape(const std::string &input) {
  std::string retVal;
  retVal.reserve(input.size());
  typedef std::string::const_iterator iterator_type;

  char const *start = "";
  iterator_type beg = input.begin();
  iterator_type end = input.end();
  unescaped_string<iterator_type> p;

  if (!bsq::parse(beg, end, p(start), retVal))
    retVal = input;
  return retVal;
}

std::string escape(const std::string &input) {
  typedef std::back_insert_iterator<std::string> sink_type;
  std::string retVal;
  retVal.reserve(input.size() * 3);
  sink_type sink(retVal);
  char const *start = "";

  escaped_string<sink_type> g;
  if (!bk::generate(sink, g(start), input))
    retVal = input;
  return retVal;
}

[Necromancer mode off]

EDIT01: fixed the zero padding stuff - special thanks to Hartmut Kaiser
EDIT02: Live on CoLiRu

Calculating the angle between the line defined by two points

Had a need for similar functionality myself, so after much hair pulling I came up with the function below

/**
 * Fetches angle relative to screen centre point
 * where 3 O'Clock is 0 and 12 O'Clock is 270 degrees
 * 
 * @param screenPoint
 * @return angle in degress from 0-360.
 */
public double getAngle(Point screenPoint) {
    double dx = screenPoint.getX() - mCentreX;
    // Minus to correct for coord re-mapping
    double dy = -(screenPoint.getY() - mCentreY);

    double inRads = Math.atan2(dy, dx);

    // We need to map to coord system when 0 degree is at 3 O'clock, 270 at 12 O'clock
    if (inRads < 0)
        inRads = Math.abs(inRads);
    else
        inRads = 2 * Math.PI - inRads;

    return Math.toDegrees(inRads);
}

What is JNDI? What is its basic use? When is it used?

What is JNDI ?

The Java Naming and Directory Interface^TM (JNDI) is an application programming interface (API) that provides naming and directory functionality to applications written using the Java^TM programming language. It is defined to be independent of any specific directory service implementation. Thus a variety of directories(new, emerging, and already deployed) can be accessed in a common way.

What is its basic use?

Most of it is covered in the above answer but I would like to provide architecture here so that above will make more sense.

enter image description here

To use the JNDI, you must have the JNDI classes and one or more service providers. The Java 2 SDK, v1.3 includes three service providers for the following naming/directory services:

Lightweight Directory Access Protocol (LDAP)
Common Object Request Broker Architecture (CORBA) Common Object Services (COS) name service
Java Remote Method Invocation (RMI) Registry

So basically you create objects and register them on the directory services which you can later do lookup and execute operation on.

How to write logs in text file when using java.util.logging.Logger

Try this sample. It works for me.

public static void main(String[] args) {  

    Logger logger = Logger.getLogger("MyLog");  
    FileHandler fh;  

    try {  

        // This block configure the logger with handler and formatter  
        fh = new FileHandler("C:/temp/test/MyLogFile.log");  
        logger.addHandler(fh);
        SimpleFormatter formatter = new SimpleFormatter();  
        fh.setFormatter(formatter);  

        // the following statement is used to log any messages  
        logger.info("My first log");  

    } catch (SecurityException e) {  
        e.printStackTrace();  
    } catch (IOException e) {  
        e.printStackTrace();  
    }  

    logger.info("Hi How r u?");  

}

Produces the output at MyLogFile.log

Apr 2, 2013 9:57:08 AM testing.MyLogger main  
INFO: My first log  
Apr 2, 2013 9:57:08 AM testing.MyLogger main  
INFO: Hi How r u?

Edit:

To remove the console handler, use

logger.setUseParentHandlers(false);

since the ConsoleHandler is registered with the parent logger from which all the loggers derive.

How to update and delete a cookie?

http://www.quirksmode.org/js/cookies.html

update would just be resetting it using createCookie

function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 *1000));
        var expires = "; expires=" + date.toGMTString();
    } else {
        var expires = "";
    }
    document.cookie = name + "=" + value + expires + "; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') {
            c = c.substring(1,c.length);
        }
        if (c.indexOf(nameEQ) == 0) {
            return c.substring(nameEQ.length,c.length);
        }
    }
    return null;
}

function eraseCookie(name) {
    createCookie(name,"",-1);
}

Deep copy, shallow copy, clone

Deep copy: Clone this object and every reference to every other object it has
Shallow copy: Clone this object and keep its references
Object clone() throws CloneNotSupportedException: It is not specified whether this should return a deep or shallow copy, but at the very least: o.clone() != o

Select query to get data from SQL Server

That is by design.

http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.executenonquery(v=vs.110).aspx

For UPDATE, INSERT, and DELETE statements, the return value is the number of rows affected by the command. When a trigger exists on a table being inserted or updated, the return value includes the number of rows affected by both the insert or update operation and the number of rows affected by the trigger or triggers. For all other types of statements, the return value is -1. If a rollback occurs, the return value is also -1.

python pandas dataframe columns convert to dict key and value

If lakes is your DataFrame, you can do something like

area_dict = dict(zip(lakes.area, lakes.count))

AttributeError: 'module' object has no attribute 'urlretrieve'

Suppose you have following lines of code

MyUrl = "www.google.com" #Your url goes here
urllib.urlretrieve(MyUrl)

If you are receiving following error message

AttributeError: module 'urllib' has no attribute 'urlretrieve'

Then you should try following code to fix the issue:

import urllib.request
MyUrl = "www.google.com" #Your url goes here
urllib.request.urlretrieve(MyUrl)

Function to close the window in Tkinter

class App():
    def __init__(self):
        self.root = Tkinter.Tk()
        button = Tkinter.Button(self.root, text = 'root quit', command=self.quit)
        button.pack()
        self.root.mainloop()

    def quit(self):
        self.root.destroy()

app = App()

How do I extract the contents of an rpm?

In NixOS, there is rpmextract. It is a wrapper around rpm2cpio, exactly as @Alan Evangelista wanted. https://github.com/NixOS/nixpkgs/tree/master/pkgs/tools/archivers/rpmextract

Swap x and y axis without manually swapping values

In Numbers, click on the chart. Then in the BOTTOM LEFT corner there is the the option to either 'Plot Rows as Series'or 'Plot Columns as series'

Is there a way to make a DIV unselectable?

The following CSS code works almost modern browser:

.unselectable {
    -moz-user-select: -moz-none;
    -khtml-user-select: none;
    -webkit-user-select: none;
    -o-user-select: none;
    user-select: none;
}

For IE, you must use JS or insert attribute in html tag.

<div id="foo" unselectable="on" class="unselectable">...</div>

Java properties UTF-8 encoding in Eclipse

Properties props = new Properties();
URL resource = getClass().getClassLoader().getResource("data.properties");         
props.load(new InputStreamReader(resource.openStream(), "UTF8"));

this works well in java 1.6. How can i do this in 1.5, Since Properties class does not have a method to pars InputStreamReader.

node.js remove file

fs.unlinkSync() if you want to remove files synchronously and
fs.unlink() if you want to remove it asynchronously.

Here you can find a good article.

merge one local branch into another local branch

To merge one branch into another, such as merging "feature_x" branch into "master" branch:

git checkout master

git merge feature_x

This page is the first result for several search engines when looking for "git merge one branch into another". However, the original question is more specific and special case than the title would suggest.
It is also more complex than both the subject and the search expression. As such, this is a minimal but explanatory answer for the benefit of most visitors.

Convert DateTime in C# to yyyy-MM-dd format and Store it to MySql DateTime Field

Use DateTime.Now.ToString("yyyy-MM-dd h:mm tt");. See this.

jQuery - prevent default, then continue default

When you bind the .submit() event to the form, and you do the things you want to do before returning (true), these things happen prior to the actual submission.

For example:

$('form').submit(function(){
    alert('I do something before the actual submission');
    return true;
});

Simple example

Another example on jquery.com: http://api.jquery.com/submit/#entry-examples

How does C compute sin() and other math functions?

Concerning trigonometric function like sin(), cos(),tan() there has been no mention, after 5 years, of an important aspect of high quality trig functions: Range reduction.

An early step in any of these functions is to reduce the angle, in radians, to a range of a 2*p interval. But p is irrational so simple reductions like x = remainder(x, 2*M_PI) introduce error as M_PI, or machine pi, is an approximation of p. So, how to do x = remainder(x, 2*p)?

Early libraries used extended precision or crafted programming to give quality results but still over a limited range of double. When a large value was requested like sin(pow(2,30)), the results were meaningless or 0.0 and maybe with an error flag set to something like TLOSS total loss of precision or PLOSS partial loss of precision.

Good range reduction of large values to an interval like -p to p is a challenging problem that rivals the challenges of the basic trig function, like sin(), itself.

A good report is Argument reduction for huge arguments: Good to the last bit (1992). It covers the issue well: discusses the need and how things were on various platforms (SPARC, PC, HP, 30+ other) and provides a solution algorithm the gives quality results for all double from -DBL_MAX to DBL_MAX.

If the original arguments are in degrees, yet may be of a large value, use fmod() first for improved precision. A good fmod() will introduce no error and so provide excellent range reduction.

// sin(degrees2radians(x))
sin(degrees2radians(fmod(x, 360.0))); // -360.0 < fmod(x,360) < +360.0

Various trig identities and remquo() offer even more improvement. Sample: sind()

Appending output of a Batch file To log file

It's also possible to use java Foo | tee -a some.log. it just prints to stdout as well. Like:

user at Computer in ~
$ echo "hi" | tee -a foo.txt
hi

user at Computer in ~
$ echo "hello" | tee -a foo.txt
hello

user at Computer in ~
$ cat foo.txt
hi
hello

What does auto do in margin:0 auto?

From the CSS specification on Calculating widths and margins for Block-level, non-replaced elements in normal flow:

If both 'margin-left' and 'margin-right' are 'auto', their used values are equal. This horizontally centers the element with respect to the edges of the containing block.

Digital Certificate: How to import .cer file in to .truststore file using?

The way you import a .cer file into the trust store is the same way you'd import a .crt file from say an export from Firefox.

You do not have to put an alias and the password of the keystore, you can just type:

keytool -v -import -file somefile.crt  -alias somecrt -keystore my-cacerts

Preferably use the cacerts file that is already in your Java installation (jre\lib\security\cacerts) as it contains secure "popular" certificates.

Update regarding the differences of cer and crt (just to clarify) According to Apache with SSL - How to convert CER to CRT certificates? and user @Spawnrider

CER is a X.509 certificate in binary form, DER encoded.
CRT is a binary X.509 certificate, encapsulated in text (base-64) encoding.
It is not the same encoding.

What's the difference between git clone --mirror and git clone --bare

A clone copies the refs from the remote and stuffs them into a subdirectory named 'these are the refs that the remote has'.

A mirror copies the refs from the remote and puts them into its own top level - it replaces its own refs with those of the remote.

This means that when someone pulls from your mirror and stuffs the mirror's refs into thier subdirectory, they will get the same refs as were on the original. The result of fetching from an up-to-date mirror is the same as fetching directly from the initial repo.

Instagram API: How to get all user media?

I've solved this issue with the optional parameter count set to -1.

Copy all files with a certain extension from all subdirectories

find [SOURCEPATH] -type f -name '[PATTERN]' | 
    while read P; do cp --parents "$P" [DEST]; done

you may remove the --parents but there is a risk of collision if multiple files bear the same name.

How to reduce the image file size using PIL

If you hava a fact png (1MB for 400x400 etc.):

__import__("importlib").import_module("PIL.Image").open("out.png").save("out.png")

git diff between cloned and original remote repository

1) Add any remote repositories you want to compare:

git remote add foobar git://github.com/user/foobar.git

2) Update your local copy of a remote:

git fetch foobar

Fetch won't change your working copy.

3) Compare any branch from your local repository to any remote you've added:

git diff master foobar/master

request exceeds the configured maxQueryStringLength when using [Authorize]

i have this error using datatables.net

i fixed changing the default ajax Get to POST in te properties of the DataTable()

"ajax": {
        "url": "../ControllerName/MethodJson",
        "type": "POST"
    },

How to prevent Right Click option using jquery

Method 1:

<script type="text/javascript" language="javascript">
        $(document).ready(function(){

        $(document).bind("contextmenu",function(e){

            return false;

            });

    });

</script>

Method 2:

<script type="text/javascript" language="javascript">
        $(document).ready(function(){

        $(document).bind("contextmenu",function(e){

            e.preventDefault();

            });

    });

</script>

align 3 images in same row with equal spaces?

Option 1:
- Instead of putting the images inside div put each one of them inside a span.
- Float 1st and 2nd image to left.
- Give some left padding to the 2nd image.
- Float the right image to right.

Always remember to add overflow:hidden to the parent (if you have one) of all the images because using floats with images have some side effects.

Option 2 (Preferred):
- Put all the images inside a table with border="0".
- Make the width of the table 100%.

This will be the best way to make sure the 2nd image is alligned to the center always without worrying for the exact width of the table.

Something like below:

<table width="100%" border="0">
  <tr>    
  <td><img src="@Url.Content("~/images/image1.bmp")" alt="" align="left" /></td>
  <td><img src="@Url.Content("~/images/image2.bmp")" alt="" align="center" /></td>
  <td><img src="@Url.Content("~/images/image3.bmp")" alt="" align="right"/></td>
  </tr>
</table>

Get underlined text with Markdown

In Jupyter Notebooks you can use Markdown in the following way for underlined text. This is similar to HTML5: (<u> and </u>).

<u>Underlined Words Here</u>

Checking if a field contains a string

As of version 2.4, you can create a text index on the field(s) to search and use the $text operator for querying.

First, create the index:

db.users.createIndex( { "username": "text" } )

Then, to search:

db.users.find( { $text: { $search: "son" } } )

Benchmarks (~150K documents):

Regex (other answers) => 5.6-6.9 seconds
Text Search => .164-.201 seconds

Notes:

A collection can have only one text index. You can use a wildcard text index if you want to search any string field, like this: db.collection.createIndex( { "$**": "text" } ).
A text index can be large. It contains one index entry for each unique post-stemmed word in each indexed field for each document inserted.
A text index will take longer to build than a normal index.
A text index does not store phrases or information about the proximity of words in the documents. As a result, phrase queries will run much more effectively when the entire collection fits in RAM.

Bringing a subview to be in front of all other views

try this:

self.view.layer.zPosition = 1;

How to get rid of `deprecated conversion from string constant to ‘char*’` warnings in GCC?

Here is how to do it inline in a file, so you don't have to modify your Makefile.

// gets rid of annoying "deprecated conversion from string constant blah blah" warning
#pragma GCC diagnostic ignored "-Wwrite-strings"

You can then later...

#pragma GCC diagnostic pop

Error while waiting for device: Time out after 300seconds waiting for emulator to come online

I have faced the same issue you have mentioned and could solve it by just deleting the current avd and creating a new one.It's working perfectly well now.

JSP : JSTL's <c:out> tag

Older versions of JSP did not support the second syntax.

Live-stream video from one android phone to another over WiFi

I did work on something like this once, but sending a video and playing it in real time is a really complex thing. I suggest you work with PNG's only. In my implementation What i did was capture PNGs using the host camera and then sending them over the network to the client, Which will display the image as soon as received and request the next image from the host. Since you are on wifi that communication will be fast enough to get around 8-10 images per-second(approximation only, i worked on Bluetooth). So this will look like a continuous video but with much less effort. For communication you may use UDP sockets(Faster and less complex) or DLNA (Not sure how that works).

How to remove focus from input field in jQuery?

$(':text').attr("disabled", "disabled"); sets all textbox to disabled mode. You can do in another way like giving each textbox id. By doing this code weight will be more and performance issue will be there.

So better have $(':text').attr("disabled", "disabled"); approach.

Variable might not have been initialized error

You declared them but did not provide them with an intial value - thus, they're unintialized. Try something like:

public static Rand searchCount (int[] x)  
{ 
  int a = 0 ;  
  int b = 0 ;

and the warnings should go away.

How to create relationships in MySQL

Certain MySQL engines support foreign keys. For example, InnoDB can establish constraints based on foreign keys. If you try to delete an entry in one table that has dependents in another, the delete will fail.

If you are using a table type in MySQL, such as MyISAM, that doesn't support foreign keys, you don't link the tables anywhere except your diagrams and queries.

For example, in a query you link two tables in a select statement with a join:

SELECT a, b from table1 LEFT JOIN table2 USING (common_field);

How to get a password from a shell script without echoing

First of all, if anyone is going to store any password in a file, I would make sure it's hashed. It's not the best security, but at least it will not be in plain text.

First, create the password and hash it:

echo "password123" | md5sum  | cut -d '-' -f 1 > /tmp/secret

Now, create your program to use the hash. In this case, this little program receives user input for a password without echoing, and then converts it to hash to be compared with the stored hash. If it matches the stored hash, then access is granted:

#!/bin/bash

PASSWORD_FILE="/tmp/secret"
MD5_HASH=$(cat /tmp/secret)
PASSWORD_WRONG=1


while [ $PASSWORD_WRONG -eq 1 ]
 do
    echo "Enter your password:"
    read -s ENTERED_PASSWORD
    if [ "$MD5_HASH" != "$(echo $ENTERED_PASSWORD | md5sum | cut -d '-' -f 1)" ]; then
        echo "Access Deniend: Incorrenct password!. Try again"
    else
        echo "Access Granted"
        PASSWORD_WRONG=0
    fi
done

Maven:Non-resolvable parent POM and 'parent.relativePath' points at wrong local POM

         ` Adding the following to pom.xml will resolve the issue.      <pluginRepositories>
        <pluginRepository>
            <id>central</id>
            <name>Central Repository</name>
            <url>https://repo.maven.apache.org/maven2</url>
            <layout>default</layout>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
            <releases>
                <updatePolicy>never</updatePolicy>
            </releases>
        </pluginRepository>
   </pluginRepositories>
    
   <repositories>
        <repository>
            <id>central</id>
            <name>Central Repository</name>
            <url>https://repo.maven.apache.org/maven2</url>
            <layout>default</layout>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
   </repositories>   `

Global variable Python classes

What you have is correct, though you will not call it global, it is a class attribute and can be accessed via class e.g Shape.lolwut or via an instance e.g. shape.lolwut but be careful while setting it as it will set an instance level attribute not class attribute

class Shape(object):
    lolwut = 1

shape = Shape()

print Shape.lolwut,  # 1
print shape.lolwut,  # 1

# setting shape.lolwut would not change class attribute lolwut 
# but will create it in the instance
shape.lolwut = 2

print Shape.lolwut,  # 1
print shape.lolwut,  # 2

# to change class attribute access it via class
Shape.lolwut = 3

print Shape.lolwut,  # 3
print shape.lolwut   # 2

output:

1 1 1 2 3 2

Somebody may expect output to be 1 1 2 2 3 3 but it would be incorrect

Run jQuery function onclick

You can bind the mouseenter and mouseleave events and jQuery will emulate those where they are not native.

$("div.system_box").on('mouseenter', function(){
    //enter
})
.on('mouseleave', function(){
    //leave
});

fiddle

note: do not use hover as that is deprecated

How do I resolve a path relative to an ASP.NET MVC 4 application root?

I find this code useful when I need a path outside of a controller, such as when I'm initializing components in Global.asax.cs:

HostingEnvironment.MapPath("~/Data/data.html")

Get URL of ASP.Net Page in code-behind

If you want only the scheme and authority part of the request (protocol, host and port) use

Request.Url.GetLeftPart(UriPartial.Authority)

Get integer value from string in swift

I wrote an extension for that purpose. It always returns an Int. If the string does not fit into an Int, 0 is returned.

extension String {
    func toTypeSafeInt() -> Int {
        if let safeInt = self.toInt() {
            return safeInt
        } else {
            return 0
        }
    }
}

How to sort a NSArray alphabetically?

This already has good answers for most purposes, but I'll add mine which is more specific.

In English, normally when we alphabetise, we ignore the word "the" at the beginning of a phrase. So "The United States" would be ordered under "U" and not "T".

This does that for you.

It would probably be best to put these in categories.

// Sort an array of NSStrings alphabetically, ignoring the word "the" at the beginning of a string.

-(NSArray*) sortArrayAlphabeticallyIgnoringThes:(NSArray*) unsortedArray {

    NSArray * sortedArray = [unsortedArray sortedArrayUsingComparator:^NSComparisonResult(NSString* a, NSString* b) {

        //find the strings that will actually be compared for alphabetical ordering
        NSString* firstStringToCompare = [self stringByRemovingPrecedingThe:a];
        NSString* secondStringToCompare = [self stringByRemovingPrecedingThe:b];

        return [firstStringToCompare compare:secondStringToCompare];
    }];
    return sortedArray;
}

// Remove "the"s, also removes preceding white spaces that are left as a result. Assumes no preceding whitespaces to start with. nb: Trailing white spaces will be deleted too.

-(NSString*) stringByRemovingPrecedingThe:(NSString*) originalString {
    NSString* result;
    if ([[originalString substringToIndex:3].lowercaseString isEqualToString:@"the"]) {
        result = [[originalString substringFromIndex:3] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
    }
    else {
        result = originalString;
    }
    return result;
}

Convert month name to month number in SQL Server

I recently had a similar experience (sql server 2012). I did not have the luxury of controlling the input, I just had a requirement to report on it. Luckily the dates were entered with leading 3 character alpha month abbreviations, so this made it simple & quick:

TRY_CONVERT(DATETIME,REPLACE(obs.DateValueText,SUBSTRING(obs.DateValueText,1,3),CHARINDEX(SUBSTRING(obs.DateValueText,1,3),'...JAN,FEB,MAR,APR,MAY,JUN,JUL,AUG,SEP,OCT,NOV,DEC')/4))

It worked for 12 hour:
Feb-14-2015 5:00:00 PM 2015-02-14 17:00:00.000
and 24 hour times:
Sep-27-2013 22:45 2013-09-27 22:45:00.000

(thanks ryanyuyu)

Uploading Files in ASP.net without using the FileUpload server control

The Request.Files collection contains any files uploaded with your form, regardless of whether they came from a FileUpload control or a manually written <input type="file">.

So you can just write a plain old file input tag in the middle of your WebForm, and then read the file uploaded from the Request.Files collection.

MySQL: @variable vs. variable. What's the difference?

MySQL has a concept of user-defined variables.

They are loosely typed variables that may be initialized somewhere in a session and keep their value until the session ends.

They are prepended with an @ sign, like this: @var

You can initialize this variable with a SET statement or inside a query:

SET @var = 1

SELECT @var2 := 2

When you develop a stored procedure in MySQL, you can pass the input parameters and declare the local variables:

DELIMITER //

CREATE PROCEDURE prc_test (var INT)
BEGIN
    DECLARE  var2 INT;
    SET var2 = 1;
    SELECT  var2;
END;
//

DELIMITER ;

These variables are not prepended with any prefixes.

The difference between a procedure variable and a session-specific user-defined variable is that a procedure variable is reinitialized to NULL each time the procedure is called, while the session-specific variable is not:

CREATE PROCEDURE prc_test ()
BEGIN
    DECLARE var2 INT DEFAULT 1;
    SET var2 = var2 + 1;
    SET @var2 = @var2 + 1;
    SELECT  var2, @var2;
END;

SET @var2 = 1;

CALL prc_test();

var2  @var2
---   ---
2     2


CALL prc_test();

var2  @var2
---   ---
2     3


CALL prc_test();

var2  @var2
---   ---
2     4

As you can see, var2 (procedure variable) is reinitialized each time the procedure is called, while @var2 (session-specific variable) is not.

(In addition to user-defined variables, MySQL also has some predefined "system variables", which may be "global variables" such as @@global.port or "session variables" such as @@session.sql_mode; these "session variables" are unrelated to session-specific user-defined variables.)

Conditional WHERE clause in SQL Server

Try this

SELECT 
    DateAppr,
    TimeAppr,
    TAT,
    LaserLTR,
    Permit,
    LtrPrinter,
    JobName,
    JobNumber,
    JobDesc,
    ActQty,
    (ActQty-LtrPrinted) AS L,
    (ActQty-QtyInserted) AS M,
    ((ActQty-LtrPrinted)-(ActQty-QtyInserted)) AS N
FROM 
    [test].[dbo].[MM]
WHERE 
    DateDropped = 0
    AND (
    (ISNULL(@JobsOnHold, 0) = 1 AND DateAppr >= 0) 
    OR 
    (ISNULL(@JobsOnHold, 0) != 1 AND DateAppr != 0)
    )

What is __gxx_personality_v0 for?

It's part of the exception handling. The gcc EH mechanism allows to mix various EH models, and a personality routine is invoked to determine if an exception match, what finalization to invoke, etc. This specific personality routine is for C++ exception handling (as opposed to, say, gcj/Java exception handling).

PHP - Check if the page run on Mobile or Desktop browser

I used Robert Lee`s answer and it works great! Just writing down the complete function i'm using:

function isMobileDevice(){
    $aMobileUA = array(
        '/iphone/i' => 'iPhone', 
        '/ipod/i' => 'iPod', 
        '/ipad/i' => 'iPad', 
        '/android/i' => 'Android', 
        '/blackberry/i' => 'BlackBerry', 
        '/webos/i' => 'Mobile'
    );

    //Return true if Mobile User Agent is detected
    foreach($aMobileUA as $sMobileKey => $sMobileOS){
        if(preg_match($sMobileKey, $_SERVER['HTTP_USER_AGENT'])){
            return true;
        }
    }
    //Otherwise return false..  
    return false;
}

How to generate a random alpha-numeric string

public static String RandomAlphanum(int length)
{
    String charstring = "abcdefghijklmnopqrstuvwxyz0123456789";
    String randalphanum = "";
    double randroll;
    String randchar;
    for (double i = 0; i < length; i++)
    {
        randroll = Math.random();
        randchar = "";
        for (int j = 1; j <= 35; j++)
        {
            if (randroll <= (1.0 / 36.0 * j))
            {
                randchar = Character.toString(charstring.charAt(j - 1));
                break;
            }
        }
        randalphanum += randchar;
    }
    return randalphanum;
}

I used a very primitive algorithm using Math.random(). To increase randomness, you can directly implement the util.Date class. Nevertheless, it works.

How do I correct the character encoding of a file?

With vim from command line:

vim -c "set encoding=utf8" -c "set fileencoding=utf8" -c "wq" filename

Listing contents of a bucket with boto3

In order to handle large key listings (i.e. when the directory list is greater than 1000 items), I used the following code to accumulate key values (i.e. filenames) with multiple listings (thanks to Amelio above for the first lines). Code is for python3:

    from boto3  import client
    bucket_name = "my_bucket"
    prefix      = "my_key/sub_key/lots_o_files"

    s3_conn   = client('s3')  # type: BaseClient  ## again assumes boto.cfg setup, assume AWS S3
    s3_result =  s3_conn.list_objects_v2(Bucket=bucket_name, Prefix=prefix, Delimiter = "/")

    if 'Contents' not in s3_result:
        #print(s3_result)
        return []

    file_list = []
    for key in s3_result['Contents']:
        file_list.append(key['Key'])
    print(f"List count = {len(file_list)}")

    while s3_result['IsTruncated']:
        continuation_key = s3_result['NextContinuationToken']
        s3_result = s3_conn.list_objects_v2(Bucket=bucket_name, Prefix=prefix, Delimiter="/", ContinuationToken=continuation_key)
        for key in s3_result['Contents']:
            file_list.append(key['Key'])
        print(f"List count = {len(file_list)}")
    return file_list

wget/curl large file from google drive

Nov 2020

If you prefer using bash script, this worked for me: (5Gb file, publicly available)

#!/bin/bash
if [ $# != 2 ]; then
echo "Usage: googledown.sh ID save_name"
exit 0
fi
confirm=$(wget --quiet --save-cookies /tmp/cookies.txt --keep-session-cookies --no-check-certificate 'https://docs.google.com/uc?export=download&id='$1 -O- | sed -rn 's/.*confirm=([0-9A-Za-z_]+).*/\1\n/p')
echo $confirm
wget --load-cookies /tmp/cookies.txt "https://docs.google.com/uc?export=download&confirm=$confirm&id=$1" -O $2 && rm -rf /tmp/cookies.txt

Getting "Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?" when installing lxml through pip

It is not strange for me that none of the solutions above came up, but I saw how the igd installation removed the new version and installed the old one, for the solution I downloaded this archive:https://pypi.org/project/igd/#files

and changed the recommended version of the new version: 'lxml==4.3.0' in setup.py It works!

Cannot convert lambda expression to type 'string' because it is not a delegate type

For people just stumbling upon this now, I resolved an error of this type that was thrown with all the references and using statements placed properly. There's evidently some confusion with substituting in a function that returns DataTable instead of calling it on a declared DataTable. For example:

This worked for me:

DataTable dt = SomeObject.ReturnsDataTable();

List<string> ls = dt.AsEnumerable().Select(dr => dr["name"].ToString()).ToList<string>();

But this didn't:

List<string> ls = SomeObject.ReturnsDataTable().AsEnumerable().Select(dr => dr["name"].ToString()).ToList<string>();

I'm still not 100% sure why, but if anyone is frustrated by an error of this type, give this a try.

Find the last time table was updated

SELECT so.name,so.modify_date

FROM sys.objects as so

INNER JOIN INFORMATION_SCHEMA.TABLES as ist

ON ist.TABLE_NAME=so.name where ist.TABLE_TYPE='BASE TABLE' AND 

TABLE_CATALOG='DbName' order by so.modify_date desc;

this is help to get table modify with table name

How to parse JSON string in Typescript

Type-safe `JSON.parse`

You can continue to use JSON.parse, as TS is a JS superset. There is still a problem left: JSON.parse returns any, which undermines type safety. Here are two options for stronger types:

1. User-defined type guards (playground)

Custom type guards are the simplest solution and often sufficient for external data validation:

// For example, you expect to parse a given value with `MyType` shape
type MyType = { name: string; description: string; }

// Validate this value with a custom type guard
function isMyType(o: any): o is MyType {
  return "name" in o && "description" in o
}

A JSON.parse wrapper can then take a type guard as input and return the parsed, typed value:

const safeJsonParse = <T>(guard: (o: any) => o is T) => (text: string): ParseResult<T> => {
  const parsed = JSON.parse(text)
  return guard(parsed) ? { parsed, hasError: false } : { hasError: true }
}

type ParseResult<T> =
  | { parsed: T; hasError: false; error?: undefined }
  | { parsed?: undefined; hasError: true; error?: unknown }

Usage example:

const json = '{ "name": "Foo", "description": "Bar" }';
const result = safeJsonParse(isMyType)(json) // result: ParseResult<MyType>
if (result.hasError) {
  console.log("error :/")  // further error handling here
} else {
  console.log(result.parsed.description) // result.parsed now has type `MyType`
}

safeJsonParse might be extended to fail fast or try/catch JSON.parse errors.

2. External libraries

Writing type guard functions manually becomes cumbersome, if you need to validate many different values. There are libraries to assist with this task - examples (no comprehensive list):

io-ts: rel. popular (3.2k stars currently), fp-ts peer dependency, functional programming style
zod: quite new (repo: 2020-03-07), strives to be more procedural/object-oriented than io-ts
typescript-is: TS transformer for compiler API, additional wrapper like ttypescript needed
typescript-json-schema/ajv: Create JSON schema from types and validate it with ajv

More infos

Send JSON data with jQuery

Because you haven't specified neither request content type, nor correct JSON request. Here's the correct way to send a JSON request:

var arr = { City: 'Moscow', Age: 25 };
$.ajax({
    url: 'Ajax.ashx',
    type: 'POST',
    data: JSON.stringify(arr),
    contentType: 'application/json; charset=utf-8',
    dataType: 'json',
    async: false,
    success: function(msg) {
        alert(msg);
    }
});

Things to notice:

Usage of the JSON.stringify method to convert a javascript object into a JSON string which is native and built-into modern browsers. If you want to support older browsers you might need to include json2.js
Specifying the request content type using the contentType property in order to indicate to the server the intent of sending a JSON request
The dataType: 'json' property is used for the response type you expect from the server. jQuery is intelligent enough to guess it from the server Content-Type response header. So if you have a web server which respects more or less the HTTP protocol and responds with Content-Type: application/json to your request jQuery will automatically parse the response into a javascript object into the success callback so that you don't need to specify the dataType property.

Things to be careful about:

What you call arr is not an array. It is a javascript object with properties (City and Age). Arrays are denoted with [] in javascript. For example [{ City: 'Moscow', Age: 25 }, { City: 'Paris', Age: 30 }] is an array of 2 objects.

Writing an Excel file in EPPlus

Have you looked at the samples provided with EPPlus?

This one shows you how to create a file http://epplus.codeplex.com/wikipage?title=ContentSheetExample

This one shows you how to use it to stream back a file http://epplus.codeplex.com/wikipage?title=WebapplicationExample

This is how we use the package to generate a file.

var newFile = new FileInfo(ExportFileName);
using (ExcelPackage xlPackage = new ExcelPackage(newFile))
{                       
    // do work here                            
    xlPackage.Save();
}

refresh leaflet map: map container is already initialized

Before initializing map check for is the map is already initiated or not

var container = L.DomUtil.get('map');

if(container != null){

container._leaflet_id = null;

}

It works for me

Python: create dictionary using dict() with integer keys?

Yes, but not with that version of the constructor. You can do this:

>>> dict([(1, 2), (3, 4)])
{1: 2, 3: 4}

There are several different ways to make a dict. As documented, "providing keyword arguments [...] only works for keys that are valid Python identifiers."

Python: How to check if keys exists and retrieve value from Dictionary in descending priority

You can use myDict.has_key(keyname) as well to validate if the key exists.

Edit based on the comments -

This would work only on versions lower than 3.1. has_key has been removed from Python 3.1. You should use the in operator if you are using Python 3.1

UTL_FILE.FOPEN() procedure not accepting path for directory?

You need to register the directory with Oracle. fopen takes the name of a directory object, not the path. For example:

(you may need to login as SYS to execute these)

CREATE DIRECTORY MY_DIR AS 'C:\';

GRANT READ ON DIRECTORY MY_DIR TO SCOTT;

Then, you can refer to it in the call to fopen:

execute sal_status('MY_DIR','vin1.txt');

How I can check if an object is null in ruby on rails 2?

it's nilin Ruby, not null. And it's enough to say if @objectname to test whether it's not nil. And no then. You can find more on if syntax here:

http://en.wikibooks.org/wiki/Ruby_Programming/Syntax/Control_Structures#if

Reorder bars in geom_bar ggplot2 by value

Your code works fine, except that the barplot is ordered from low to high. When you want to order the bars from high to low, you will have to add a -sign before value:

ggplot(corr.m, aes(x = reorder(miRNA, -value), y = value, fill = variable)) + 
  geom_bar(stat = "identity")

which gives:

enter image description here

Used data:

corr.m <- structure(list(miRNA = structure(c(5L, 2L, 3L, 6L, 1L, 4L), .Label = c("mmu-miR-139-5p", "mmu-miR-1983", "mmu-miR-301a-3p", "mmu-miR-5097", "mmu-miR-532-3p", "mmu-miR-96-5p"), class = "factor"),
                         variable = structure(c(1L, 1L, 1L, 1L, 1L, 1L), .Label = "pos", class = "factor"),
                         value = c(7L, 75L, 70L, 5L, 10L, 47L)),
                    class = "data.frame", row.names = c("1", "2", "3", "4", "5", "6"))

Java Wait and Notify: IllegalMonitorStateException

You're calling both wait and notifyAll without using a synchronized block. In both cases the calling thread must own the lock on the monitor you call the method on.

From the docs for notify (wait and notifyAll have similar documentation but refer to notify for the fullest description):

This method should only be called by a thread that is the owner of this object's monitor. A thread becomes the owner of the object's monitor in one of three ways:

By executing a synchronized instance method of that object.

By executing the body of a synchronized statement that synchronizes on the object.

For objects of type Class, by executing a synchronized static method of that class.

Only one thread at a time can own an object's monitor.

Only one thread will be able to actually exit wait at a time after notifyAll as they'll all have to acquire the same monitor again - but all will have been notified, so as soon as the first one then exits the synchronized block, the next will acquire the lock etc.

Angularjs action on click of button

The calculation occurs immediately since the calculation call is bound in the template, which displays its result when quantity changes.

Instead you could try the following approach. Change your markup to the following:

<div ng-controller="myAppController" style="text-align:center">
  <p style="font-size:28px;">Enter Quantity:
      <input type="text" ng-model="quantity"/>
  </p>
  <button ng-click="calculateQuantity()">Calculate</button>
  <h2>Total Cost: Rs.{{quantityResult}}</h2>
</div>

Next, update your controller:

myAppModule.controller('myAppController', function($scope,calculateService) {
  $scope.quantity=1;
  $scope.quantityResult = 0;

  $scope.calculateQuantity = function() {
    $scope.quantityResult = calculateService.calculate($scope.quantity, 10);
  };
});

Here's a JSBin example that demonstrates the above approach.

The problem with this approach is the calculated result remains visible with the old value till the button is clicked. To address this, you could hide the result whenever the quantity changes.

This would involve updating the template to add an ng-change on the input, and an ng-if on the result:

<input type="text" ng-change="hideQuantityResult()" ng-model="quantity"/>

and

<h2 ng-if="showQuantityResult">Total Cost: Rs.{{quantityResult}}</h2>

In the controller add:

$scope.showQuantityResult = false;

$scope.calculateQuantity = function() {
  $scope.quantityResult = calculateService.calculate($scope.quantity, 10);
  $scope.showQuantityResult = true;
};

$scope.hideQuantityResult = function() {
  $scope.showQuantityResult = false;
};

These updates can be seen in this JSBin demo.

MySQL "Group By" and "Order By"

Do a GROUP BY after the ORDER BY by wrapping your query with the GROUP BY like this:

SELECT t.* FROM (SELECT * FROM table ORDER BY time DESC) t GROUP BY t.from

Android/Eclipse: how can I add an image in the res/drawable folder?

Copy the image CTRL + C then in Eclipse select drawable folder, right click -> Paste

$("#form1").validate is not a function

I had the same issue, and yes I had my jquery included first followed by the jquery validate script. I had no idea what was wrong. Turns out I was using a validate url that had moved. I figured this out by doing the following:

Open firefox
Open firebug
Click the NET tab in firebug. This will show you all the resources that get loaded.
Load your page.
Check the loaded resources and see if both your jquery & jquery.validate.js loaded.

In my situation I had a 403 Forbidden error when trying to obtain (http://dev.jquery.com/view/trunk/plugins/validate/jquery.validate.js which is used in the example on http://rocketsquared.com/wiki/Plugins/Validation ).

Turns out the that link (http://dev.jquery.com/view/trunk/plugins/validate/jquery.validate.js) had moved to http://view.jquery.com/trunk/plugins/validate/jquery.validate.js (Firebug told me this when I loaded the file locally as opposed to on my web server).

NOTE: I tried using microsoft's CDN link also but it failed when I tried to load the javascript file in the browser with the correct url, there was some odd issue going on with the CDN site.

Find number of decimal places in decimal value regardless of culture

You can try:

int priceDecimalPlaces =
        price.ToString(System.Globalization.CultureInfo.InvariantCulture)
              .Split('.')[1].Length;

Python 3 Float Decimal Points/Precision

The simple way to do this is by using the round buit-in.

round(2.6463636263,2) would be displayed as 2.65.

How to include a font .ttf using CSS?

I know this is an old post but this solved my problem.

_x000D_

@font-face{_x000D_
  font-family: "Font Name";_x000D_
  src: url("../fonts/font-name.ttf") format("truetype");_x000D_
}

_x000D_

notice src:url("../fonts/font-name.ttf"); we use two periods to go back to the root directory and then into the fonts folder or wherever your file is located.

hope this helps someone down the line:) happy coding

scrollbars in JTextArea

You first have to define a JTextArea as per usual:

public final JTextArea mainConsole = new JTextArea("");

Then you put a JScrollPane over the TextArea

JScrollPane scrollPane = new JScrollPane(mainConsole);
scrollPane.setBounds(10,60,780,500);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);

The last line says that the vertical scrollbar will always be there. There is a similar command for horizontal. Otherwise, the scrollbar will only show up when it is needed (or never, if you use _SCROLLBAR_NEVER). I guess it's your call which way you want to use it.

You can also add wordwrap to the JTextArea if you want to:Guide Here

Good luck,
Norm M

P.S. Make sure you add the ScrollPane to the JPanel and not add the JTextArea.

Android - border for button

Please look here about creating a shape drawable http://developer.android.com/guide/topics/resources/drawable-resource.html#Shape

Once you have done this, in the XML for your button set android:background="@drawable/your_button_border"

Convert Json String to C# Object List

The variables/parameters within the class definition requires { get; set; } I was using like a variable declaration (stupid of me, because it was working for other scenarios) without

{ get; set; }

Because of which, whatever I send from the JavaScript, it was not being received in the Action method. It was always getting null or empty model.

Once the {get; set;} is added, it worked like charm.

I hope it helps someone who is coming from VB6 style of programming line.

Convert string to Date in java

String str_date="13-09-2011";
DateFormat formatter ; 
Date date ; 
formatter = new SimpleDateFormat("dd-MM-yyyy");
date = (Date)formatter.parse(str_date); 
System.out.println("Today is " +date.getTime());

Try this

Find first element in a sequence that matches a predicate

You could use a generator expression with a default value and then next it:

next((x for x in seq if predicate(x)), None)

Although for this one-liner you need to be using Python >= 2.6.

This rather popular article further discusses this issue: Cleanest Python find-in-list function?.

Pointer to class data member "::*"

A realworld example of a pointer-to-member could be a more narrow aliasing constructor for std::shared_ptr:

template <typename T>
template <typename U>
shared_ptr<T>::shared_ptr(const shared_ptr<U>, T U::*member);

What that constructor would be good for

assume you have a struct foo:

struct foo {
    int ival;
    float fval;
};

If you have given a shared_ptr to a foo, you could then retrieve shared_ptr's to its members ival or fval using that constructor:

auto foo_shared = std::make_shared<foo>();
auto ival_shared = std::shared_ptr<int>(foo_shared, &foo::ival);

This would be useful if want to pass the pointer foo_shared->ival to some function which expects a shared_ptr

https://en.cppreference.com/w/cpp/memory/shared_ptr/shared_ptr

Android: Get checked checkbox values

Insert ellipsis (...) into HTML tag if content too wide

I rewrote Alex's function to use to the MooTools library. I changed it a bit to word jump rather than add the ellipsis in the middle of a word.

Element.implement({
ellipsis: function() {
    if(this.getStyle("overflow") == "hidden") {
        var text = this.get('html');
        var multiline = this.hasClass('multiline');
        var t = this.clone()
            .setStyle('display', 'none')
            .setStyle('position', 'absolute')
            .setStyle('overflow', 'visible')
            .setStyle('width', multiline ? this.getSize().x : 'auto')
            .setStyle('height', multiline ? 'auto' : this.getSize().y)
            .inject(this, 'after');

        function height() { return t.measure(t.getSize).y > this.getSize().y; };
        function width() { return t.measure(t.getSize().x > this.getSize().x; };

        var func = multiline ? height.bind(this) : width.bind(this);

        while (text.length > 0 && func()) {
            text = text.substr(0, text.lastIndexOf(' '));
            t.set('html', text + "...");
        }

        this.set('html', t.get('html'));
        t.dispose();
    }
}
});

Is there a limit to the length of a GET request?

W3C unequivocally disclaimed this as a myth here

http://www.w3.org/2001/tag/doc/get7#myths

Fade In on Scroll Down, Fade Out on Scroll Up - based on element position in window

I tweaked your code a bit and made it more robust. In terms of progressive enhancement it's probaly better to have all the fade-in-out logic in JavaScript. In the example of myfunksyde any user without JavaScript sees nothing because of the opacity: 0;.

    $(window).on("load",function() {
    function fade() {
        var animation_height = $(window).innerHeight() * 0.25;
        var ratio = Math.round( (1 / animation_height) * 10000 ) / 10000;

        $('.fade').each(function() {

            var objectTop = $(this).offset().top;
            var windowBottom = $(window).scrollTop() + $(window).innerHeight();

            if ( objectTop < windowBottom ) {
                if ( objectTop < windowBottom - animation_height ) {
                    $(this).html( 'fully visible' );
                    $(this).css( {
                        transition: 'opacity 0.1s linear',
                        opacity: 1
                    } );

                } else {
                    $(this).html( 'fading in/out' );
                    $(this).css( {
                        transition: 'opacity 0.25s linear',
                        opacity: (windowBottom - objectTop) * ratio
                    } );
                }
            } else {
                $(this).html( 'not visible' );
                $(this).css( 'opacity', 0 );
            }
        });
    }
    $('.fade').css( 'opacity', 0 );
    fade();
    $(window).scroll(function() {fade();});
});

See it here: http://jsfiddle.net/78xjLnu1/16/

Cheers, Martin

Move textfield when keyboard appears swift

i am working with swift 4 and i am solved this issue without use any extra bottom constraint look my code is here.its really working on my case

1) Add Notification Observer in did load

override func viewDidLoad() {
        super.viewDidLoad()
        setupManager()
        // Do any additional setup after loading the view.
        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
    }

2) Remove Notification Observer like

deinit {
        NotificationCenter.default.removeObserver(self)
    }

3) Add keyboard show/ hide methods like

 @objc func keyboardWillShow(notification: NSNotification) {
            if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
                UIView.animate(withDuration: 0.1, animations: { () -> Void in
                    self.view.frame.origin.y -= keyboardSize.height
                    self.view.layoutIfNeeded()
                })
            }
        }

@objc func keyboardWillHide(notification: NSNotification) {
        if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
            UIView.animate(withDuration: 0.1, animations: { () -> Void in
                self.view.frame.origin.y += keyboardSize.height
                self.view.layoutIfNeeded()
            })
        }
    }

4) Add textfeild delegate and add touchesBegan methods .usefull for hide the keyboard when touch outside the textfeild on screen

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        view.endEditing(true)

    }

Combine Date and Time columns using python pandas

DATA:

<TICKER>,<PER>,<DATE>,<TIME>,<OPEN>,<HIGH>,<LOW>,<CLOSE>,<VOL> SPFB.RTS,1,20190103,100100,106580.0000000,107260.0000000,106570.0000000,107230.0000000,3726

CODE:

data.columns = ['ticker', 'per', 'date', 'time', 'open', 'high', 'low', 'close', 'vol']    
data.datetime = pd.to_datetime(data.date.astype(str) + ' ' + data.time.astype(str), format='%Y%m%d %H%M%S')

git command to move a folder inside another

 git mv common include

should work.

From the git mv man page:

git mv [-f] [-n] [-k] <source> ... <destination directory>

In the second form, the last argument has to be an existing directory; the given sources will be moved into this directory.
The index is updated after successful completion, but the change must still be committed.

No "git add" should be done before the move.

Note: "git mv A B/", when B does not exist as a directory, should error out, but it didn't.

See commit c57f628 by Matthieu Moy (moy) for Git 1.9/2.0 (Q1 2014):

Git used to trim the trailing slash, and make the command equivalent to 'git mv file no-such-dir', which created the file no-such-dir (while the trailing slash explicitly stated that it could only be a directory).

This patch skips the trailing slash removal for the destination path.
The path with its trailing slash is passed to rename(2), which errors out with the appropriate message:

$ git mv file no-such-dir/
fatal: renaming 'file' failed: Not a directory

JavaScript: How to pass object by value?

I needed to copy an object by value (not reference) and I found this page helpful:

What is the most efficient way to deep clone an object in JavaScript?. In particular, cloning an object with the following code by John Resig:

//Shallow copy
var newObject = jQuery.extend({}, oldObject);
// Deep copy
var newObject = jQuery.extend(true, {}, oldObject);

how to align all my li on one line?

Using Display: table

HTML:

<ul class="my-row">
    <li>1</li>
    <li>2</li>
    <li>3</li>
</ul>

CSS:

ul.my-row {
  display: table;
  width: 100%;
  text-align: center;
}

ul.my-row > li {
  display: table-cell;
}

SCSS:

ul {
  &.my-row {
    display: table;
    width: 100%;
    text-align: center;

    > li {
      display: table-cell;
    }
  } 
}

Work great for me

Conditional replacement of values in a data.frame

Since you are conditionally indexing df$est, you also need to conditionally index the replacement vector df$a:

index <- df$b == 0
df$est[index] <- (df$a[index] - 5)/2.533

Of course, the variable index is just temporary, and I use it to make the code a bit more readible. You can write it in one step:

df$est[df$b == 0] <- (df$a[df$b == 0] - 5)/2.533

For even better readibility, you can use within:

df <- within(df, est[b==0] <- (a[b==0]-5)/2.533)

The results, regardless of which method you choose:

df
          a b      est
1  11.77000 2 0.000000
2  10.90000 3 0.000000
3  10.32000 2 0.000000
4  10.96000 0 2.352941
5   9.90600 0 1.936834
6  10.70000 0 2.250296
7  11.43000 1 0.000000
8  11.41000 2 0.000000
9  10.48512 4 0.000000
10 11.19000 0 2.443743

As others have pointed out, an alternative solution in your example is to use ifelse.

Quick easy way to migrate SQLite3 to MySQL?

I recently had to migrate from MySQL to JavaDB for a project that our team is working on. I found a Java library written by Apache called DdlUtils that made this pretty easy. It provides an API that lets you do the following:

Discover a database's schema and export it as an XML file.
Modify a DB based upon this schema.
Import records from one DB to another, assuming they have the same schema.

The tools that we ended up with weren't completely automated, but they worked pretty well. Even if your application is not in Java, it shouldn't be too difficult to whip up a few small tools to do a one-time migration. I think I was able to pull of our migration with less than 150 lines of code.

Found a swap file by the name

Accepted answer fails to mention how to delete the .swp file.

Hit "D" when the prompt comes up and it will remove it.

In my case, after I hit D it left the latest saved version intact and deleted the .swp which got created because I exited VIM incorrectly

Show/hide div if checkbox selected

You would need to always consider the state of all checkboxes!

You could increase or decrease a number on checking or unchecking, but imagine the site loads with three of them checked.

So you always need to check all of them:

<script type="text/javascript">
<!--
function showMe (it, box) {
  // consider all checkboxes with same name
  var checked = amountChecked(box.name);

  var vis = (checked >= 3) ? "block" : "none";
  document.getElementById(it).style.display = vis;
}

function amountChecked(name) {
  var all = document.getElementsByName(name);

  // count checked
  var result = 0;
  all.forEach(function(el) {
    if (el.checked) result++;
  });

  return result;
}
//-->
</script>

IFrame: This content cannot be displayed in a frame

The X-Frame-Options is defined in the Http Header and not in the <head> section of the page you want to use in the iframe.

Accepted values are: DENY, SAMEORIGIN and ALLOW-FROM "url"

How to set the context path of a web application in Tomcat 7.0

Simplest and flexible solution is below: Inside ${Tomcat_home}/config/server.xml

Change the autoDeploy="false" deployOnStartup="false" under Host element like below This is must.

<Host name="localhost"  appBase="webapps"
        unpackWARs="true" autoDeploy="false" deployOnStartup="false">

Add below line under Host element.

<Context path="" docBase="ServletInAction.war"  reloadable="true">
            <WatchedResource>WEB-INF/web.xml</WatchedResource>
        </Context>

With the above approach we can add as many applications under webapps with different context path names.

Line continue character in C#

@"string here
that is long you mean"

But be careful, because

@"string here
           and space before this text
     means the space is also a part of the string"

It also escapes things in the string

@"c:\\folder" // c:\\folder
@"c:\folder" // c:\folder
"c:\\folder" // c:\folder

Related

Java Scanner String input

When you read in the year month day hour minutes with something like nextInt() it leaves rest of the line in the parser/buffer (even if it is blank) so when you call nextLine() you are reading the rest of this first line.

I suggest you to use scan.next() instead of scan.nextLine().

Set default format of datetimepicker as dd-MM-yyyy

Ensure that control Format property is properly set to use a custom format:

DateTimePicker1.Format = DateTimePickerFormat.Custom

Then this is how you can set your desired format:

DateTimePicker1.CustomFormat = "dd-MM-yyyy"

Download files in laravel using Response::download

While using laravel 5 use this code as you don`t need headers.

return response()->download($pathToFile); .

If you are using Fileentry you can use below function for downloading.

// download file
public function download($fileId){  
    $entry = Fileentry::where('file_id', '=', $fileId)->firstOrFail();
    $pathToFile=storage_path()."/app/".$entry->filename;
    return response()->download($pathToFile);           
}

INSTALL_FAILED_DUPLICATE_PERMISSION... C2D_MESSAGE

For making the application & its multiple instance you can directly add this line then you can able to install the multiple application with same package name every time just modify the application id:

Example : application id : XXXX.123 (Old or existing one which is installed in phone)

Now make application id as : XXX.1234 and install the app.

Format:

<uses-permission android:name="${applicationId}.permission.C2D_MESSAGE"/>
<permission
    android:name="${applicationId}.permission.C2D_MESSAGE"
    android:protectionLevel="signature"/>

You don't have write permissions for the /Library/Ruby/Gems/2.3.0 directory. (mac user)

As @idleberg mentions, on Mac OS, it is best to install rbenv to avoid permissions errors when using manually installed ruby.

Installation

$ brew update
$ brew install rbenv

Add the following in .bashrc file:

eval "$(rbenv init -)"

Now, we can look at the list of ruby versions available for install

$ rbenv install -l

Install version 2.3.8 for example

$ rbenv install 2.3.8

Now we can use this ruby version globally

$ rbenv global 2.3.8

Finally run

$ rbenv rehash

$ which ruby
/Users/myuser/.rbenv/shims/ruby
$ ruby -v
ruby 2.3.7p456 (2018-03-28 revision 63024) [x86_64-darwin17]

Go for it

Now install bundler

$ gem install bundler

All done!

PHP AES encrypt / decrypt

$sDecrypted and $sEncrypted were undefined in your code. See a solution that works (but is not secure!):

STOP!

This example is insecure! Do not use it!

$Pass = "Passwort";
$Clear = "Klartext";        

$crypted = fnEncrypt($Clear, $Pass);
echo "Encrypred: ".$crypted."</br>";

$newClear = fnDecrypt($crypted, $Pass);
echo "Decrypred: ".$newClear."</br>";        

function fnEncrypt($sValue, $sSecretKey)
{
    return rtrim(
        base64_encode(
            mcrypt_encrypt(
                MCRYPT_RIJNDAEL_256,
                $sSecretKey, $sValue, 
                MCRYPT_MODE_ECB, 
                mcrypt_create_iv(
                    mcrypt_get_iv_size(
                        MCRYPT_RIJNDAEL_256, 
                        MCRYPT_MODE_ECB
                    ), 
                    MCRYPT_RAND)
                )
            ), "\0"
        );
}

function fnDecrypt($sValue, $sSecretKey)
{
    return rtrim(
        mcrypt_decrypt(
            MCRYPT_RIJNDAEL_256, 
            $sSecretKey, 
            base64_decode($sValue), 
            MCRYPT_MODE_ECB,
            mcrypt_create_iv(
                mcrypt_get_iv_size(
                    MCRYPT_RIJNDAEL_256,
                    MCRYPT_MODE_ECB
                ), 
                MCRYPT_RAND
            )
        ), "\0"
    );
}

But there are other problems in this code which make it insecure, in particular the use of ECB (which is not an encryption mode, only a building block on top of which encryption modes can be defined). See Fab Sa's answer for a quick fix of the worst problems and Scott's answer for how to do this right.

How to run a bash script from C++ program

Use the system function.

system("myfile.sh"); // myfile.sh should be chmod +x

HTML 5 input type="number" element for floating point numbers on Chrome

Try this

_x000D_

<input onkeypress='return event.charCode >= 48 && _x000D_
                          event.charCode <= 57 || _x000D_
                          event.charCode == 46'>

_x000D_

How can I conditionally require form inputs with AngularJS?

For Angular 2

<input [(ngModel)]='email' [required]='!phone' />
<input [(ngModel)]='phone' [required]='!email' />

js 'types' can only be used in a .ts file - Visual Studio Code using @ts-check

I'm using flow with vscode but had the same problem. I solved it with these steps:

Install the extension Flow Language Support
Disable the built-in TypeScript extension:
1. Go to Extensions tab
2. Search for @builtin TypeScript and JavaScript Language Features
3. Click on Disable

Displaying Image in Java

Running your code shows an image for me, after adjusting the path. Can you verify that your image path is correct, try absolute path for instance?

font-weight is not working properly?

Most browsers don't fully support the numerical values for font-weight. Here's a good article about the problem, and even tough it's a little old, it does seem to be correct.

If you need something bolder then you might want to try using a different font that's bolder than your existing one. Naturally, you could probably adjust the font size for a similar effect.

How to run function of parent window when child window closes?

This is an old post, but I thought I would add another method to do this:

var win = window.open("http://www.google.com");

var winClosed = setInterval(function () {

    if (win.closed) {
        clearInterval(winClosed);
        foo(); //Call your function here
    }

}, 250);

You don't have to modify the contents or use any event handlers from the child window.

JWT authentication for ASP.NET Web API

I've managed to achieve it with minimal effort (just as simple as with ASP.NET Core).

For that I use OWIN Startup.cs file and Microsoft.Owin.Security.Jwt library.

In order for the app to hit Startup.cs we need to amend Web.config:

<configuration>
  <appSettings>
    <add key="owin:AutomaticAppStartup" value="true" />
    ...

Here's how Startup.cs should look:

using MyApp.Helpers;
using Microsoft.IdentityModel.Tokens;
using Microsoft.Owin;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.Jwt;
using Owin;

[assembly: OwinStartup(typeof(MyApp.App_Start.Startup))]

namespace MyApp.App_Start
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            app.UseJwtBearerAuthentication(
                new JwtBearerAuthenticationOptions
                {
                    AuthenticationMode = AuthenticationMode.Active,
                    TokenValidationParameters = new TokenValidationParameters()
                    {
                        ValidAudience = ConfigHelper.GetAudience(),
                        ValidIssuer = ConfigHelper.GetIssuer(),
                        IssuerSigningKey = ConfigHelper.GetSymmetricSecurityKey(),
                        ValidateLifetime = true,
                        ValidateIssuerSigningKey = true
                    }
                });
        }
    }
}

Many of you guys use ASP.NET Core nowadays, so as you can see it doesn't differ a lot from what we have there.

It really got me perplexed first, I was trying to implement custom providers, etc. But I didn't expect it to be so simple. OWIN just rocks!

Just one thing to mention - after I enabled OWIN Startup NSWag library stopped working for me (e.g. some of you might want to auto-generate typescript HTTP proxies for Angular app).

The solution was also very simple - I replaced NSWag with Swashbuckle and didn't have any further issues.

Ok, now sharing ConfigHelper code:

public class ConfigHelper
{
    public static string GetIssuer()
    {
        string result = System.Configuration.ConfigurationManager.AppSettings["Issuer"];
        return result;
    }

    public static string GetAudience()
    {
        string result = System.Configuration.ConfigurationManager.AppSettings["Audience"];
        return result;
    }

    public static SigningCredentials GetSigningCredentials()
    {
        var result = new SigningCredentials(GetSymmetricSecurityKey(), SecurityAlgorithms.HmacSha256);
        return result;
    }

    public static string GetSecurityKey()
    {
        string result = System.Configuration.ConfigurationManager.AppSettings["SecurityKey"];
        return result;
    }

    public static byte[] GetSymmetricSecurityKeyAsBytes()
    {
        var issuerSigningKey = GetSecurityKey();
        byte[] data = Encoding.UTF8.GetBytes(issuerSigningKey);
        return data;
    }

    public static SymmetricSecurityKey GetSymmetricSecurityKey()
    {
        byte[] data = GetSymmetricSecurityKeyAsBytes();
        var result = new SymmetricSecurityKey(data);
        return result;
    }

    public static string GetCorsOrigins()
    {
        string result = System.Configuration.ConfigurationManager.AppSettings["CorsOrigins"];
        return result;
    }
}

Another important aspect - I sent JWT Token via Authorization header, so typescript code looks for me as follows:

(the code below is generated by NSWag)

@Injectable()
export class TeamsServiceProxy {
    private http: HttpClient;
    private baseUrl: string;
    protected jsonParseReviver: ((key: string, value: any) => any) | undefined = undefined;

    constructor(@Inject(HttpClient) http: HttpClient, @Optional() @Inject(API_BASE_URL) baseUrl?: string) {
        this.http = http;
        this.baseUrl = baseUrl ? baseUrl : "https://localhost:44384";
    }

    add(input: TeamDto | null): Observable<boolean> {
        let url_ = this.baseUrl + "/api/Teams/Add";
        url_ = url_.replace(/[?&]$/, "");

        const content_ = JSON.stringify(input);

        let options_ : any = {
            body: content_,
            observe: "response",
            responseType: "blob",
            headers: new HttpHeaders({
                "Content-Type": "application/json", 
                "Accept": "application/json",
                "Authorization": "Bearer " + localStorage.getItem('token')
            })
        };

See headers part - "Authorization": "Bearer " + localStorage.getItem('token')

JSON response parsing in Javascript to get key/value pair

var yourobj={
"c":{
    "a":[{"name":"cable - black","value":2},{"name":"case","value":2}]
    },
"o":{
    "v":[{"name":"over the ear headphones - white/purple","value":1}]
},
"l":{
    "e":[{"name":"lens cleaner","value":1}]
},
"h":{
    "d":[{"name":"hdmi cable","value":1},
         {"name":"hdtv essentials (hdtv cable setup)","value":1},
         {"name":"hd dvd \u0026 blue-ray disc lens cleaner","value":1}]
}}

first of all it's a good idea to get organized
top level reference must be a more convenient name other that a..v... etc
in o.v,o.i.e no need for the array [] because it is one json entry

my solution

var obj = [];
for(n1 in yourjson)
    for(n1_1 in yourjson[n])
        for(n1_2 in yourjson[n][n1_1])
            obj[n1_2[name]] = n1_2[value];

Approved code

for(n1 in yourobj){
    for(n1_1 in yourobj[n1]){
    for(n1_2 in yourobj[n1][n1_1]){
            for(n1_3 in yourobj[n1][n1_1][n1_2]){
      obj[yourobj[n1][n1_1][n1_2].name]=yourobj[n1][n1_1][n1_2].value;
            }
    }
 }
}
console.log(obj);

result

*You should use distinguish accessorizes when using [] method or dot notation

proove

using href links inside <option> tag

You cant use href tags within option tags. You will need javascript to do so.

<select name="formal" onchange="javascript:handleSelect(this)">
<option value="home">Home</option>
<option value="contact">Contact</option>
</select>

<script type="text/javascript">
  function handleSelect(elm)
  {
     window.location = elm.value+".php";
  }
</script>

Android Location Providers - GPS or Network Provider?

There are some great answers mentioned here. Another approach you could take would be to use some free SDKs available online like Atooma, tranql and Neura, that can be integrated with your Android application (it takes less than 20 min to integrate). Along with giving you the accurate location of your user, it can also give you good insights about your user’s activities. Also, some of them consume less than 1% of your battery

Remove everything after a certain character

It works for me very nicely:

var x = '/Controller/Action?id=11112&value=4444';
var remove_after= x.indexOf('?');
var result =  x.substring(0, remove_after);
alert(result);

Converting URL to String and back again

Swift 3 version code:

let urlString = "file:///Users/Documents/Book/Note.txt"
let pathURL = URL(string: urlString)!
print("the url = " + pathURL.path)

How can I get Apache gzip compression to work?

Your .htaccess should run just fine; it depends on four different Apache modules (one per each <IfModule> directive). I guess one of the following:

your Apache server doesn't have either mod_filter, mod_deflate, mod_headers and/or mod_setenvif modules installed and running. If you can access the server config, please check /etc/apache2/httpd.conf (and the related Apache config files); otherwise, you can see which modules are loaded via phpinfo(), under the apache2handler section (see attached image); (EDIT) OR, you can open a terminal window and issue the command sudo apachectl -M that will list the loaded modules;
if you get an http 500 internal server error, your server may not be allowed to use .htaccess files;
you are trying to load a PHP file that sends its own headers (overwriting Apache'sheaders), thus "confusing" the browser.

In any case, you should double-check your server config and error logs to see what's going wrong. Just to be sure, try to use the fastest way suggested here in Apache docs:

AddOutputFilterByType DEFLATE text/html text/plain text/xml

and then try to load a large textfile (preferably, clean your cache first).

(EDIT) If the needed modules are there (in the Apache modules dir) but aren't loaded, just edit /etc/apache2/httpd.conf and add a LoadModule directive for each one of them.

If the needed modules aren't there (neither loaded, nor in the Apache modules directory), I fear that the only option is reinstalling Apache (a complete version).

phpinfo() apache2handler section

regular expression for finding 'href' value of a <a> link

Thanks everyone (specially @plalx)

I find it quite overkill enforce the validity of the href attribute with such a complex and cryptic pattern while a simple expression such as
<a\s+(?:[^>]*?\s+)?href="([^"]*)"
would suffice to capture all URLs. If you want to make sure they contain at least a query string, you could just use
<a\s+(?:[^>]*?\s+)?href="([^"]+\?[^"]+)"

My final regex string:

First use one of this:

st = @"((www\.|https?|ftp|gopher|telnet|file|notes|ms-help):((//)|(\\\\))+ \w\d:#@%/;$()~_?\+-=\\\.&]*)";
st = @"<a href[^>]*>(.*?)</a>";
st = @"((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))?)";
st = @"((?:(?:https?|ftp|gopher|telnet|file|notes|ms-help):(?://|\\\\)(?:www\.)?|www\.)[\w\d:#@%/;$()~_?\+,\-=\\.&]+)";
st = @"(?:(?:https?|ftp|gopher|telnet|file|notes|ms-help):(?://|\\\\)(?:www\.)?|www\.)";
st = @"(((https?|ftp|gopher|telnet|file|notes|ms-help):((//)|(\\\\))+)|(www\.)[\w\d:#@%/;$()~_?\+-=\\\.&]*)";
st = @"href=[""'](?<url>(http|https)://[^/]*?\.(com|org|net|gov))(/.*)?[""']";
st = @"(<a.*?>.*?</a>)";
st = @"(?:hrefs*=)(?:[s""']*)(?!#|mailto|location.|javascript|.*css|.*this.)(?.*?)(?:[s>""'])";
st = @"http://([\\w+?\\.\\w+])+([a-zA-Z0-9\\~\\!\\@\\#\\$\\%\\^\\&amp;\\*\\(\\)_\\-\\=\\+\\\\\\/\\?\\.\\:\\;\\'\\,]*)?";
st = @"http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?";
st = @"(http|https)://([a-zA-Z0-9\\~\\!\\@\\#\\$\\%\\^\\&amp;\\*\\(\\)_\\-\\=\\+\\\\\\/\\?\\.\\:\\;\\'\\,]*)?";
st = @"((http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&amp;:/~\+#]*[\w\-\@?^=%&amp;/~\+#])?)";
st = @"http://([\\w+?\\.\\w+])+([a-zA-Z0-9\\~\\!\\@\\#\\$\\%\\^\\&amp;\\*\\(\\)_\\-\\=\\+\\\\\\/\\?\\.\\:\\;\\'\\,]*)?";
st = @"http(s?)\:\/\/[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*(:(0-9)*)*(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+&amp;%\$#_]*)?$";
st = @"(?<Protocol>\w+):\/\/(?<Domain>[\w.]+\/?)\S*";

my choice is

@"(?<Protocol>\w+):\/\/(?<Domain>[\w.]+\/?)\S*"

Second Use this:

st = "(.*)?(.*)=(.*)";

Problem Solved. Thanks every one :)

No suitable records were found verify your bundle identifier is correct

Double check the Bundle OS Type code in your App's info.plist, for me, the only way around this error was to set it to APPL.

The weird thing is that the error was regarding to my frameworks bundle id, tho changing the above in my app solved it.

How do I declare an array of undefined or no initial size?

Here's a sample program that reads stdin into a memory buffer that grows as needed. It's simple enough that it should give some insight in how you might handle this kind of thing. One thing that's would probably be done differently in a real program is how must the array grows in each allocation - I kept it small here to help keep things simpler if you wanted to step through in a debugger. A real program would probably use a much larger allocation increment (often, the allocation size is doubled, but if you're going to do that you should probably 'cap' the increment at some reasonable size - it might not make sense to double the allocation when you get into the hundreds of megabytes).

Also, I used indexed access to the buffer here as an example, but in a real program I probably wouldn't do that.

#include <stdlib.h>
#include <stdio.h>


void fatal_error(void);

int main( int argc, char** argv)
{
    int buf_size = 0;
    int buf_used = 0;

    char* buf = NULL;
    char* tmp = NULL;    

    char c;
    int i = 0;

    while ((c = getchar()) != EOF) {
        if (buf_used == buf_size) {
             //need more space in the array

             buf_size += 20;
             tmp = realloc(buf, buf_size); // get a new larger array
             if (!tmp) fatal_error();

             buf = tmp;
        }

        buf[buf_used] = c; // pointer can be indexed like an array
        ++buf_used;
    }

    puts("\n\n*** Dump of stdin ***\n");

    for (i = 0; i < buf_used; ++i) {
        putchar(buf[i]);
    }

    free(buf);

    return 0;
}

void fatal_error(void)
{
    fputs("fatal error - out of memory\n", stderr);
    exit(1);
}

This example combined with examples in other answers should give you an idea of how this kind of thing is handled at a low level.

Regex to match 2 digits, optional decimal, two digits

A previous answer is mostly correct, but it will also match the empty string. The following would solve this.

^([0-9]?[0-9](\.[0-9][0-9]?)?)|([0-9]?[0-9]?(\.[0-9][0-9]?))$

navbar color in Twitter Bootstrap

You can customize your own version on the Bootstrap official website.

In Java, should I escape a single quotation mark (') in String (double quoted)?

It's best practice only to escape the quotes when you need to - if you can get away without escaping it, then do!

The only times you should need to escape are when trying to put " inside a string, or ' in a character:

String quotes = "He said \"Hello, World!\"";
char quote = '\'';

Squash the first two commits in Git?

Update July 2012 (git 1.7.12+)

You now can rebase all commits up to root, and select the second commit Y to be squashed with the first X.

git rebase -i --root master

pick sha1 X
squash sha1 Y
pick sha1 Z

git rebase [-i] --root $tip
This command can now be used to rewrite all the history leading from "$tip" down to the root commit.

See commit df5df20c1308f936ea542c86df1e9c6974168472 on GitHub from Chris Webb (arachsys).

Original answer (February 2009)

I believe you will find different recipes for that in the SO question "How do I combine the first two commits of a git repository?"

Charles Bailey provided there the most detailed answer, reminding us that a commit is a full tree (not just diffs from a previous states).
And here the old commit (the "initial commit") and the new commit (result of the squashing) will have no common ancestor.
That mean you can not "commit --amend" the initial commit into new one, and then rebase onto the new initial commit the history of the previous initial commit (lots of conflicts)

(That last sentence is no longer true with git rebase -i --root <aBranch>)

Rather (with A the original "initial commit", and B a subsequent commit needed to be squashed into the initial one):

Go back to the last commit that we want to form the initial commit (detach HEAD):
```
git checkout <sha1_for_B>
```
Reset the branch pointer to the initial commit, but leaving the index and working tree intact:
```
git reset --soft <sha1_for_A>
```
Amend the initial tree using the tree from 'B':
```
git commit --amend
```
Temporarily tag this new initial commit (or you could remember the new commit sha1 manually):
```
git tag tmp
```
Go back to the original branch (assume master for this example):
```
git checkout master
```
Replay all the commits after B onto the new initial commit:
```
git rebase --onto tmp <sha1_for_B>
```
Remove the temporary tag:
```
git tag -d tmp
```

That way, the "rebase --onto" does not introduce conflicts during the merge, since it rebases history made after the last commit (B) to be squashed into the initial one (which was A) to tmp (representing the squashed new initial commit): trivial fast-forward merges only.

That works for "A-B", but also "A-...-...-...-B" (any number of commits can be squashed into the initial one this way)

How to use lodash to find and return an object from Array?

Fetch id basing on name

 {
    "roles": [
     {
      "id": 1,
      "name": "admin",
     },
     {
      "id": 3,
      "name": "manager",
     }
    ]
    }



    fetchIdBasingOnRole() {
          const self = this;
          if (this.employee.roles) {
            var roleid = _.result(
              _.find(this.getRoles, function(obj) {
                return obj.name === self.employee.roles;
              }),
              "id"
            );
          }
          return roleid;
        },

How do I convert NSMutableArray to NSArray?

I like both of the 2 main solutions:

NSArray *array = [NSArray arrayWithArray:mutableArray];

NSArray *array = [mutableArray copy];

The primary difference I see in them is how they behave when mutableArray is nil:

NSMutableArray *mutableArray = nil;
NSArray *array = [NSArray arrayWithArray:mutableArray];
// array == @[] (empty array)

NSMutableArray *mutableArray = nil;
NSArray *array = [mutableArray copy];
// array == nil

Bootstrap 3: how to make head of dropdown link clickable in navbar

This topic is super old, but I needed a solution that worked on desktop AND mobile and none of these seemed to work for me. Unfortunately, this is the solution I came up with that involves checking the window width and comparing it to the mobile menu breakpoint:

$( 'a.dropdown-toggle' ).on( 'click', function( e ) {
    var $a = $( this ),
        $parent = $a.parent( 'li' ),
        mobile_bp = 767, // Default breakpoint, may need to change this.
        window_width = $( window ).width(),
        is_mobile = window_width <= mobile_bp;

    if ( is_mobile && ! $parent.hasClass( 'open' ) ) {
        e.preventDefault();
        return false;
    }

    location.href = $a.attr( 'href' );
    return true;
});

CS0234: Mvc does not exist in the System.Web namespace

None of previous answers worked for me.

I noticed that my project was referencing another project using the System.Web.Mvc reference from the .NET Framework.

I just deleted that assembly and added the "Microsoft.AspNet.Mvc" NuGet package and that fixed my problem.

How to get maximum value from the Collection (for example ArrayList)?

Integer class implements Comparable.So we can easily get the max or min value of the Integer list.

public int maxOfNumList() {
    List<Integer> numList = new ArrayList<>();
    numList.add(1);
    numList.add(10);
    return Collections.max(numList);
}

If a class does not implements Comparable and we have to find max and min value then we have to write our own Comparator.

List<MyObject> objList = new ArrayList<MyObject>();
objList.add(object1);
objList.add(object2);
objList.add(object3);
MyObject maxObject = Collections.max(objList, new Comparator<MyObject>() {
    @Override
    public int compare(MyObject o1, MyObject o2) {
        if (o1.getValue() == o2.getValue()) {
            return 0;
        } else if (o1.getValue() > o2.getValue()) {
            return -1;
        } else if (o1.getValue() < o2.getValue()) {
            return 1;
        }
        return 0;
    }
});

Shell command to sum integers, one per line?

For Ruby Lovers

ruby -e "puts ARGF.map(&:to_i).inject(&:+)" numbers.txt

'any' vs 'Object'

Contrary to .NET where all types derive from an "object", in TypeScript, all types derive from "any". I just wanted to add this comparison as I think it will be a common one made as more .NET developers give TypeScript a try.

Text blinking jQuery

I have written a simple jquery extension for text blink whilst specifying number of times it should blink the text, Hope it helps others.

//add Blink function to jquery 
jQuery.fn.extend({
    Blink: function (i) {
        var c = i; if (i===-1 || c-- > 0) $(this).fadeTo("slow", 0.1, function () { $(this).fadeTo("slow", 1, function () { $(this).Blink(c);  }); });
    }
});
//Use it like this
$(".mytext").Blink(2); //Where 2 denotes number of time it should blink.
//For continuous blink use -1 
$(".mytext").Blink(-1);

Comparing arrays in JUnit assertions, concise built-in way?

I know the question is for JUnit4, but if you happen to be stuck at JUnit3, you could create a short utility function like that:

private void assertArrayEquals(Object[] esperado, Object[] real) {
    assertEquals(Arrays.asList(esperado), Arrays.asList(real));     
}

In JUnit3, this is better than directly comparing the arrays, since it will detail exactly which elements are different.

Maven Jacoco Configuration - Exclude classes/packages from report not working

Here is the working sample in pom.xml file.

    <plugin>
        <groupId>org.jacoco</groupId>
        <artifactId>jacoco-maven-plugin</artifactId>
        <version>${jacoco.version}</version>


        <executions>
            <execution>
                <id>prepare-agent</id>
                <goals>
                    <goal>prepare-agent</goal>
                </goals>
            </execution>
            <execution>
                <id>post-unit-test</id>
                <phase>test</phase>
                <goals>
                    <goal>report</goal>
                </goals>

            </execution>

            <execution>
                <id>default-check</id>
                <goals>
                    <goal>check</goal>
                </goals>

            </execution>
        </executions>
        <configuration>
            <dataFile>target/jacoco.exec</dataFile>
            <!-- Sets the output directory for the code coverage report. -->
            <outputDirectory>target/jacoco-ut</outputDirectory>
            <rules>
                <rule implementation="org.jacoco.maven.RuleConfiguration">
                    <element>PACKAGE</element>
                    <limits>
                        <limit implementation="org.jacoco.report.check.Limit">
                            <counter>COMPLEXITY</counter>
                            <value>COVEREDRATIO</value>
                            <minimum>0.00</minimum>
                        </limit>
                    </limits>
                </rule>
            </rules>
            <excludes>
                <exclude>com/pfj/fleet/dao/model/**/*</exclude>
            </excludes>
            <systemPropertyVariables>

                <jacoco-agent.destfile>target/jacoco.exec</jacoco-agent.destfile>
            </systemPropertyVariables>
        </configuration>
    </plugin>

Confused about UPDLOCK, HOLDLOCK

UPDLOCK is used when you want to lock a row or rows during a select statement for a future update statement. The future update might be the very next statement in the transaction.

Other sessions can still see the data. They just cannot obtain locks that are incompatiable with the UPDLOCK and/or HOLDLOCK.

You use UPDLOCK when you wan to keep other sessions from changing the rows you have locked. It restricts their ability to update or delete locked rows.

You use HOLDLOCK when you want to keep other sessions from changing any of the data you are looking at. It restricts their ability to insert, update, or delete the rows you have locked. This allows you to run the query again and see the same results.

How to call a javaScript Function in jsp on page load without using <body onload="disableView()">

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>

SSL cert "err_cert_authority_invalid" on mobile chrome only

I hope i am not too late, this solution here worked for me, i am using COMODO SSL, the above solutions seem invalid over time, my website lifetanstic.co.ke

Instead of contacting Comodo Support and gain a CA bundle file You can do the following:

When You get your new SSL cert from Comodo (by mail) they have a zip file attached. You need to unzip the zip-file and open the following files in a text editor like notepad:

AddTrustExternalCARoot.crt
COMODORSAAddTrustCA.crt
COMODORSADomainValidationSecureServerCA.crt

Then copy the text of each ".crt" file and paste the texts above eachother in the "Certificate Authority Bundle (optional)" field.

After that just add the SSL cert as usual in the "Certificate" field and click at "Autofil by Certificate" button and hit "Install".

Inspired by this gist: https://gist.github.com/ipedrazas/6d6c31144636d586dcc3

How to copy text from a div to clipboard

Adding the link as an Answer to draw more attention to Aaron Lavers' comment below the first answer.

This works like a charm - http://clipboardjs.com. Just add the clipboard.js or min file. While initiating, use the class which has the html component to be clicked and just pass the id of the component with the content to be copied, to the click element.

Drawing Isometric game worlds

Update: Corrected map rendering algorithm, added more illustrations, changed formating.

Perhaps the advantage for the "zig-zag" technique for mapping the tiles to the screen can be said that the tile's x and y coordinates are on the vertical and horizontal axes.

"Drawing in a diamond" approach:

By drawing an isometric map using "drawing in a diamond", which I believe refers to just rendering the map by using a nested for-loop over the two-dimensional array, such as this example:

tile_map[][] = [[...],...]

for (cellY = 0; cellY < tile_map.size; cellY++):
    for (cellX = 0; cellX < tile_map[cellY].size cellX++):
        draw(
            tile_map[cellX][cellY],
            screenX = (cellX * tile_width  / 2) + (cellY * tile_width  / 2)
            screenY = (cellY * tile_height / 2) - (cellX * tile_height / 2)
        )

Advantage:

The advantage to the approach is that it is a simple nested for-loop with fairly straight forward logic that works consistently throughout all tiles.

Disadvantage:

One downside to that approach is that the x and y coordinates of the tiles on the map will increase in diagonal lines, which might make it more difficult to visually map the location on the screen to the map represented as an array:

However, there is going to be a pitfall to implementing the above example code -- the rendering order will cause tiles that are supposed to be behind certain tiles to be drawn on top of the tiles in front:

In order to amend this problem, the inner for-loop's order must be reversed -- starting from the highest value, and rendering toward the lower value:

tile_map[][] = [[...],...]

for (i = 0; i < tile_map.size; i++):
    for (j = tile_map[i].size; j >= 0; j--):  // Changed loop condition here.
        draw(
            tile_map[i][j],
            x = (j * tile_width / 2) + (i * tile_width / 2)
            y = (i * tile_height / 2) - (j * tile_height / 2)
        )

With the above fix, the rendering of the map should be corrected:

"Zig-zag" approach:

Advantage:

Perhaps the advantage of the "zig-zag" approach is that the rendered map may appear to be a little more vertically compact than the "diamond" approach:

Disadvantage:

From trying to implement the zig-zag technique, the disadvantage may be that it is a little bit harder to write the rendering code because it cannot be written as simple as a nested for-loop over each element in an array:

tile_map[][] = [[...],...]

for (i = 0; i < tile_map.size; i++):
    if i is odd:
        offset_x = tile_width / 2
    else:
        offset_x = 0

    for (j = 0; j < tile_map[i].size; j++):
        draw(
            tile_map[i][j],
            x = (j * tile_width) + offset_x,
            y = i * tile_height / 2
        )

Also, it may be a little bit difficult to try to figure out the coordinate of a tile due to the staggered nature of the rendering order:

Note: The illustrations included in this answer were created with a Java implementation of the tile rendering code presented, with the following int array as the map:

tileMap = new int[][] {
    {0, 1, 2, 3},
    {3, 2, 1, 0},
    {0, 0, 1, 1},
    {2, 2, 3, 3}
};

The tile images are:

tileImage[0] -> A box with a box inside.
tileImage[1] -> A black box.
tileImage[2] -> A white box.
tileImage[3] -> A box with a tall gray object in it.

A Note on Tile Widths and Heights

The variables tile_width and tile_height which are used in the above code examples refer to the width and height of the ground tile in the image representing the tile:

Using the dimensions of the image will work, as long as the image dimensions and the tile dimensions match. Otherwise, the tile map could be rendered with gaps between the tiles.

Cannot find pkg-config error

Try

which pkg-config
if it is empty then fire
1. brew install pkg-config
2. OR : ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

SQL update fields of one table from fields of another one

_{The question is old but I felt the best answer hadn't been given, yet.}

Is there an UPDATE syntax ... without specifying the column names?

General solution with dynamic SQL

You don't need to know any column names except for some unique column(s) to join on (id in the example). Works reliably for any possible corner case I can think of.

This is specific to PostgreSQL. I am building dynamic code based on the the information_schema, in particular the table information_schema.columns, which is defined in the SQL standard and most major RDBMS (except Oracle) have it. But a DO statement with PL/pgSQL code executing dynamic SQL is totally non-standard PostgreSQL syntax.

DO
$do$
BEGIN

EXECUTE (
SELECT
  'UPDATE b
   SET   (' || string_agg(        quote_ident(column_name), ',') || ')
       = (' || string_agg('a.' || quote_ident(column_name), ',') || ')
   FROM   a
   WHERE  b.id = 123
   AND    a.id = b.id'
FROM   information_schema.columns
WHERE  table_name   = 'a'       -- table name, case sensitive
AND    table_schema = 'public'  -- schema name, case sensitive
AND    column_name <> 'id'      -- all columns except id
);

END
$do$;

Assuming a matching column in b for every column in a, but not the other way round. b can have additional columns.

WHERE b.id = 123 is optional, to update a selected row.

SQL Fiddle.

Partial solutions with plain SQL

With list of shared columns

You still need to know the list of column names that both tables share. With a syntax shortcut for updating multiple columns - shorter than what other answers suggested so far in any case.

UPDATE b
SET   (  column1,   column2,   column3)
    = (a.column1, a.column2, a.column3)
FROM   a
WHERE  b.id = 123    -- optional, to update only selected row
AND    a.id = b.id;

SQL Fiddle.

This syntax was introduced with Postgres 8.2 in 2006, long before the question was asked. Details in the manual.

Bulk update of all columns

With list of columns in `B`

If all columns of A are defined NOT NULL (but not necessarily B),
and you know the column names of B (but not necessarily A).

UPDATE b
SET   (column1, column2, column3, column4)
    = (COALESCE(ab.column1, b.column1)
     , COALESCE(ab.column2, b.column2)
     , COALESCE(ab.column3, b.column3)
     , COALESCE(ab.column4, b.column4)
      )
FROM (
   SELECT *
   FROM   a
   NATURAL LEFT JOIN  b -- append missing columns
   WHERE  b.id IS NULL  -- only if anything actually changes
   AND    a.id = 123    -- optional, to update only selected row
   ) ab
WHERE b.id = ab.id;

The NATURAL LEFT JOIN joins a row from b where all columns of the same name hold same values. We don't need an update in this case (nothing changes) and can eliminate those rows early in the process (WHERE b.id IS NULL).
We still need to find a matching row, so b.id = ab.id in the outer query.

db<>fiddle here
Old sqlfiddle.

This is standard SQL except for the FROM clause.
It works no matter which of the columns are actually present in A, but the query cannot distinguish between actual NULL values and missing columns in A, so it is only reliable if all columns in A are defined NOT NULL.

There are multiple possible variations, depending on what you know about both tables.

Using C++ filestreams (fstream), how can you determine the size of a file?

Don't use tellg to determine the exact size of the file. The length determined by tellg will be larger than the number of characters can be read from the file.

From stackoverflow question tellg() function give wrong size of file? tellg does not report the size of the file, nor the offset from the beginning in bytes. It reports a token value which can later be used to seek to the same place, and nothing more. (It's not even guaranteed that you can convert the type to an integral type.). For Windows (and most non-Unix systems), in text mode, there is no direct and immediate mapping between what tellg returns and the number of bytes you must read to get to that position.

If it is important to know exactly how many bytes you can read, the only way of reliably doing so is by reading. You should be able to do this with something like:

#include <fstream>
#include <limits>

ifstream file;
file.open(name,std::ios::in|std::ios::binary);
file.ignore( std::numeric_limits<std::streamsize>::max() );
std::streamsize length = file.gcount();
file.clear();   //  Since ignore will have set eof.
file.seekg( 0, std::ios_base::beg );

Set Colorbar Range in matplotlib

Using vmin and vmax forces the range for the colors. Here's an example:

import matplotlib as m
import matplotlib.pyplot as plt
import numpy as np

cdict = {
  'red'  :  ( (0.0, 0.25, .25), (0.02, .59, .59), (1., 1., 1.)),
  'green':  ( (0.0, 0.0, 0.0), (0.02, .45, .45), (1., .97, .97)),
  'blue' :  ( (0.0, 1.0, 1.0), (0.02, .75, .75), (1., 0.45, 0.45))
}

cm = m.colors.LinearSegmentedColormap('my_colormap', cdict, 1024)

x = np.arange(0, 10, .1)
y = np.arange(0, 10, .1)
X, Y = np.meshgrid(x,y)

data = 2*( np.sin(X) + np.sin(3*Y) )

def do_plot(n, f, title):
    #plt.clf()
    plt.subplot(1, 3, n)
    plt.pcolor(X, Y, f(data), cmap=cm, vmin=-4, vmax=4)
    plt.title(title)
    plt.colorbar()

plt.figure()
do_plot(1, lambda x:x, "all")
do_plot(2, lambda x:np.clip(x, -4, 0), "<0")
do_plot(3, lambda x:np.clip(x, 0, 4), ">0")
plt.show()

How to use Bootstrap in an Angular project?

Add this to your package.json , “dependency”

"bootstrap": "^3.3.7",

In .angular-cli.json file, to your “Styles” add

"../node_modules/bootstrap/dist/css/bootstrap.css"

update your npm by using this command

npm update

Plugin execution not covered by lifecycle configuration (JBossas 7 EAR archetype)

Even though the question is too old, but I would like to share the solution that worked for me because I already checked everything when it comes to this error. It was a pain, I spent two days trying and at the end the solution was:

update the M2e plugin in eclipse

clean and build again

Maven won't run my Project : Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:exec

I solved this issue with right click on project -> Set as Main Project.

How do I programmatically click on an element in JavaScript?

Using jQuery you can do exactly the same thing, for example:

$("a").click();

Which will "click" all anchors on the page.

Insert 2 million rows into SQL Server quickly

I ran into this scenario recently (well over 7 million rows) and eneded up using sqlcmd via powershell (after parsing raw data into SQL insert statements) in segments of 5,000 at a time (SQL can't handle 7 million lines in one lump job or even 500,000 lines for that matter unless its broken down into smaller 5K pieces. You can then run each 5K script one after the other.) as I needed to leverage the new sequence command in SQL Server 2012 Enterprise. I couldn't find a programatic way to insert seven million rows of data quickly and efficiently with said sequence command.

Secondly, one of the things to look out for when inserting a million rows or more of data in one sitting is the CPU and memory consumption (mostly memory) during the insert process. SQL will eat up memory/CPU with a job of this magnitude without releasing said processes. Needless to say if you don't have enough processing power or memory on your server you can crash it pretty easily in a short time (which I found out the hard way). If you get to the point to where your memory consumption is over 70-75% just reboot the server and the processes will be released back to normal.

I had to run a bunch of trial and error tests to see what the limits for my server was (given the limited CPU/Memory resources to work with) before I could actually have a final execution plan. I would suggest you do the same in a test environment before rolling this out into production.

response.sendRedirect() from Servlet to JSP does not seem to work

You can use this:

response.sendRedirect(String.format("%s%s", request.getContextPath(), "/views/equipment/createEquipment.jsp"));

The last part is your path in your web-app

Adding extra zeros in front of a number using jQuery?

In simple terms we can written as follows,

for(var i=1;i<=31;i++)
    i=(i<10) ? '0'+i : i;

//Because most of the time we need this for day, month or amount matters.

scp from Linux to Windows

I know this is old but I was struggling with the same. I haven't found a way to change directories, but if you just want to work with the C drive, scp defaults to C. To scp from Ubuntu to Windows, I ended up having to use (notice the double back-slashes):

scp /local/file/path [email protected]:Users\\Anshul\\Desktop

Hope this helps someone.

How to create a custom navigation drawer in android

You can easily customize the android Navigation drawer once you know how its implemented. here is a nice tutorial where you can set it up.

This will be the structure of your mainXML:

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- Framelayout to display Fragments -->
    <FrameLayout
        android:id="@+id/frame_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <!-- Listview to display slider menu -->
    <ListView
        android:id="@+id/list_slidermenu"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="right"
        android:choiceMode="singleChoice"
        android:divider="@color/list_divider"
        android:dividerHeight="1dp"        
        android:listSelector="@drawable/list_selector"
        android:background="@color/list_background"/>
</android.support.v4.widget.DrawerLayout>

You can customize this listview to your liking by adding the header. And radiobuttons.

Pandas index column title or name

The solution for multi-indexes is inside jezrael's cyclopedic answer, but it took me a while to find it so I am posting a new answer:

df.index.names gives the names of a multi-index (as a Frozenlist).

How do I edit $PATH (.bash_profile) on OSX?

Simplest answer is:

Step 1: Fire up Terminal.app

Step 2: Type nano .bash_profile – This command will open the .bash_profile document (or create it if it doesn’t already exist) in the easiest to use text editor in Terminal – Nano.

Step 3: Now you can make a simple change to the file. Paste these lines of code to change your Terminal prompt.

export PS1="___________________ | \w @ \h (\u) \n| => "

export PS2="| => "

Step 4: Now save your changes by typing ctrl +o Hit return to save. Then exit Nano by typing ctrl+x

Step 5: Now we need to *activate your changes. Type source .bash_profile and watch your prompt change.

That's it! Enjoy!

ActiveMQ connection refused

I encountered a similar problem when I was using the below to obtain connection factory ConnectionFactory factory = new
ActiveMQConnectionFactory("admin","admin","tcp://:61616");

Its resolved when I changed it to the below

ConnectionFactory factory = new ActiveMQConnectionFactory("tcp://:61616");

The below then showed that my Q size was increasing.. http://:8161/admin/queues.jsp

How to change row color in datagridview?

Works on Visual Studio 2010. (I tried it and it works!) It will paint your entire row.

Create a button for the datagridview.
Create a CellClick event and put the next line of code inside of it.

if (dataGridView3.Columns[e.ColumnIndex].Index.Equals(0)    
{
    dataGridView3.Rows[e.RowIndex].DefaultCellStyle.BackColor = Color.Beige;
}

jQuery: Get the cursor position of text in input without browser specific code?

You can't do this without some browser specific code, since they implement text select ranged slightly differently. However, there are plugins that abstract this away. For exactly what you're after, there's the jQuery Caret (jCaret) plugin.

For your code to get the position you could do something like this:

$("#myTextInput").bind("keydown keypress mousemove", function() {
  alert("Current position: " + $(this).caret().start);
});

You can test it here.

How do I use cascade delete with SQL Server?

Use something like

ALTER TABLE T2
ADD CONSTRAINT fk_employee
FOREIGN KEY (employeeID)
REFERENCES T1 (employeeID)
ON DELETE CASCADE;

Fill in the correct column names and you should be set. As mark_s correctly stated, if you have already a foreign key constraint in place, you maybe need to delete the old one first and then create the new one.

How to know Laravel version and where is it defined?

You can also check with composer:

composer show laravel/framework

Implementing Singleton with an Enum (in Java)

Since Singleton Pattern is about having a private constructor and calling some method to control the instantiations (like some getInstance), in Enums we already have an implicit private constructor.

I don't exactly know how the JVM or some container controls the instances of our Enums, but it seems it already use an implicit Singleton Pattern, the difference is we don't call a getInstance, we just call the Enum.

MySQL Foreign Key Error 1005 errno 150 primary key as foreign key

Give attention to CHARSET and COLLATE parameters when you create a table. In terms of FOREIGN KEY problems something like that:

CREATE TABLE yourTableName (
....
....
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

In my case i couldn´t create the table with FOREIGN KEY references. First i got the Error Code 1005 which pretty much says nothing. Then i added COLLATE and finally the error message complaining about CHARSET.

Error Code: 1253. COLLATION 'utf8_unicode_ci' is not valid for CHARACTER SET 'latin1'

After that correction my issue was solved.

Using DISTINCT along with GROUP BY in SQL Server

Use `DISTINCT` to remove duplicate `GROUPING SETS` from the `GROUP BY` clause

In a completely silly example using GROUPING SETS() in general (or the special grouping sets ROLLUP() or CUBE() in particular), you could use DISTINCT in order to remove the duplicate values produced by the grouping sets again:

SELECT DISTINCT actors
FROM (VALUES('a'), ('a'), ('b'), ('b')) t(actors)
GROUP BY CUBE(actors, actors)

With DISTINCT:

actors
------
NULL
a
b

Without DISTINCT:

actors
------
a
b
NULL
a
b
a
b

But why, apart from making an academic point, would you do that?

Use `DISTINCT` to find unique aggregate function values

In a less far-fetched example, you might be interested in the DISTINCT aggregated values, such as, how many different duplicate numbers of actors are there?

SELECT DISTINCT COUNT(*)
FROM (VALUES('a'), ('a'), ('b'), ('b')) t(actors)
GROUP BY actors

Answer:

count
-----
2

Use `DISTINCT` to remove duplicates with more than one `GROUP BY` column

Another case, of course, is this one:

SELECT DISTINCT actors, COUNT(*)
FROM (VALUES('a', 1), ('a', 1), ('b', 1), ('b', 2)) t(actors, id)
GROUP BY actors, id

With DISTINCT:

actors  count
-------------
a       2
b       1

Without DISTINCT:

actors  count
-------------
a       2
b       1
b       1

For more details, I've written some blog posts, e.g. about GROUPING SETS and how they influence the GROUP BY operation, or about the logical order of SQL operations (as opposed to the lexical order of operations).

Open an html page in default browser with VBA?

You need to call ShellExecute.

Adding a line break in MySQL INSERT INTO text

INSERT INTO myTable VALUES("First line\r\nSecond line\r\nThird line");

How to "wait" a Thread in Android

Don't use wait(), use either android.os.SystemClock.sleep(1000); or Thread.sleep(1000);.

The main difference between them is that Thread.sleep() can be interrupted early -- you'll be told, but it's still not the full second. The android.os call will not wake early.

Matplotlib-Animation "No MovieWriters Available"

Had the same problem under Linux. By default the animate.save method is using ffmpeg but it seems to be deprecated. https://askubuntu.com/questions/432542/is-ffmpeg-missing-from-the-official-repositories-in-14-04

Solution: Install some coder, like avconv or mencoder. Provide the alternative coder in the call:

ani.save('the_movie.mp4', writer = 'mencoder', fps=15)

I get Access Forbidden (Error 403) when setting up new alias

This question is old and although you managed to make it work but I feel it would be helpful if I make clear some of points you have raised here.

First about directory name having spaces. I have been playing with apache2 configuration files and I have discovered that, if the directory name has space then enclose it in double quotes and all problems disappear. For example...

    NameVirtualHost     local.webapp.org
    <VirtualHost local.webapp.org:80>
        ServerAdmin [email protected]
        DocumentRoot "E:/Project/my php webapp"
        ServerName local.webapp.org
    </VirtualHost>

Note the way DocumentRoot line is written.

Second is about Access forbidden from xampp. I found that default xampp configuration (..path to xampp/apache/httpd.conf) has a section that looks like the following.

    <Directory>
        AllowOverride none
        Require all denied
    </Directory>

Change it and make it look like below. Save the file restart apache from xampp and that solves the problem.

    <Directory>
       Options Indexes FollowSymLinks Includes ExecCGI
       AllowOverride none
       Require all granted
    </Directory>

Stick button to right side of div

change the CSS as follows:

div button {
position:absolute;
    right:10px;
    top:25px;
}

Parsing time string in Python

Here's a stdlib solution that supports a variable utc offset in the input time string:

>>> from email.utils import parsedate_tz, mktime_tz
>>> from datetime import datetime, timedelta
>>> timestamp = mktime_tz(parsedate_tz('Tue May 08 15:14:45 +0800 2012'))
>>> utc_time = datetime(1970, 1, 1) + timedelta(seconds=timestamp)
>>> utc_time
datetime.datetime(2012, 5, 8, 7, 14, 45)

pass parameter by link_to ruby on rails

You probably don't want to pass the car object as a parameter, try just passing car.id. What do you get when you inspect(params) after clicking "Add to cart"?

Forward X11 failed: Network error: Connection refused

Do not log in as a root user, try another one with sudo permissions.

How to force Laravel Project to use HTTPS for all routes?

You can set 'url' => 'https://youDomain.com' in config/app.php or you could use a middleware class Laravel 5 - redirect to HTTPS.

xcopy file, rename, suppress "Does xxx specify a file name..." message

xcopy src dest /I

REM This assumes dest is a folder and will create it, if it doesnt exists

Reset textbox value in javascript

To set value

 $('#searchField').val('your_value');

to retrieve value

$('#searchField').val();

SELECT last id, without INSERT

In MySQL, this does return the highest value from the id column:

SELECT MAX(id) FROM tablename;

However, this does not put that id into $n:

$n = mysql_query("SELECT max(id) FROM tablename");

To get the value, you need to do this:

$result = mysql_query("SELECT max(id) FROM tablename");

if (!$result) {
    die('Could not query:' . mysql_error());
}

$id = mysql_result($result, 0, 'id');

If you want to get the last insert ID from A, and insert it into B, you can do it with one command:

INSERT INTO B (col) SELECT MAX(id) FROM A;

What should a JSON service return on failure / error

Using HTTP status codes would be a RESTful way to do it, but that would suggest you make the rest of the interface RESTful using resource URIs and so on.

In truth, define the interface as you like (return an error object, for example, detailing the property with the error, and a chunk of HTML that explains it, etc), but once you've decided on something that works in a prototype, be ruthlessly consistent.

What is the difference between Cloud, Grid and Cluster?

Cluster differs from Cloud and Grid in that a cluster is a group of computers connected by a local area network (LAN), whereas cloud and grid are more wide scale and can be geographically distributed. Another way to put it is to say that a cluster is tightly coupled, whereas a Grid or a cloud is loosely coupled. Also, clusters are made up of machines with similar hardware, whereas clouds and grids are made up of machines with possibly very different hardware configurations.

To know more about cloud computing, I recommend reading this paper: «Above the Clouds: A Berkeley View of Cloud Computing», Michael Armbrust, Armando Fox, Rean Griffith, Anthony D. Joseph, Randy H. Katz, Andrew Konwinski, Gunho Lee, David A. Patterson, Ariel Rabkin, Ion Stoica and Matei Zaharia. The following is an abstract from the above paper:

Cloud Computing refers to both the applications delivered as services over the Internet and the hardware and systems software in the datacenters that provide those services. The services themselves have long been referred to as Software as a Service (SaaS). The datacenter hardware and software is what we call a Cloud. When a Cloud is made available in a pay-as-you-go manner to the general public, we call it a Public Cloud; the service being sold is Utility Computing. We use the term Private Cloud to refer to internal datacenters of a business or other organization, not made available to the general public. Thus, Cloud Computing is the sum of SaaS and Utility Computing, but does not include Private Clouds. People can be users or providers of SaaS, or users or providers of Utility Computing.

The difference between a cloud and a grid can be expressed as below:

Resource distribution: Cloud computing is a centralized model whereas grid computing is a decentralized model where the computation could occur over many administrative domains.
Ownership: A grid is a collection of computers which is owned by multiple parties in multiple locations and connected together so that users can share the combined power of resources. Whereas a cloud is a collection of computers usually owned by a single party.

Examples of Clouds: Amazon Web Services (AWS), Google App Engine.

Examples of Grids: FutureGrid.

Examples of cloud computing services: Dropbox, Gmail, Facebook, Youtube, RapidShare.

Run jar file in command prompt

Try this

java -jar <jar-file-name>.jar

How to make HTML Text unselectable

No one here posted an answer with all of the correct CSS variations, so here it is:

-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;

Programs & Examples On #Build events

Hiding the address bar of a browser (popup)

What is the string concatenation operator in Oracle?

How to fix committing to the wrong Git branch?

Convert and format a Date in JSP

How to get duplicate items from a list using LINQ?

Clear and reset form input fields

How to read the post request parameters using JavaScript

Showing which files have changed between two revisions

How to write "Html.BeginForm" in Razor

Insert line break inside placeholder attribute of a textarea?

Angular ng-click with call to a controller function not working

Daemon not running. Starting it now on port 5037

What is the preferred Bash shebang?

LDAP root query syntax to search more than one specific OU

Add a user control to a wpf window

Single Form Hide on Startup

'No JUnit tests found' in Eclipse

Get the week start date and week end date from week number

Encode/Decode URLs in C++

Calculating the angle between the line defined by two points

What is JNDI? What is its basic use? When is it used?

How to write logs in text file when using java.util.logging.Logger

How to update and delete a cookie?

Deep copy, shallow copy, clone

Select query to get data from SQL Server

python pandas dataframe columns convert to dict key and value

AttributeError: 'module' object has no attribute 'urlretrieve'

Function to close the window in Tkinter

How do I extract the contents of an rpm?

Swap x and y axis without manually swapping values

Is there a way to make a DIV unselectable?

Java properties UTF-8 encoding in Eclipse

node.js remove file

merge one local branch into another local branch

Convert DateTime in C# to yyyy-MM-dd format and Store it to MySql DateTime Field

jQuery - prevent default, then continue default

How does C compute sin() and other math functions?

Appending output of a Batch file To log file

What does auto do in margin:0 auto?

Digital Certificate: How to import .cer file in to .truststore file using?

What's the difference between git clone --mirror and git clone --bare

Instagram API: How to get all user media?

Copy all files with a certain extension from all subdirectories

How to reduce the image file size using PIL

git diff between cloned and original remote repository

request exceeds the configured maxQueryStringLength when using [Authorize]

How to prevent Right Click option using jquery

align 3 images in same row with equal spaces?

Get underlined text with Markdown

Checking if a field contains a string

Bringing a subview to be in front of all other views

How to get rid of `deprecated conversion from string constant to ‘char*’` warnings in GCC?

Error while waiting for device: Time out after 300seconds waiting for emulator to come online

JSP : JSTL's <c:out> tag

Live-stream video from one android phone to another over WiFi

How to remove focus from input field in jQuery?

Variable might not have been initialized error

How to create relationships in MySQL

How to get a password from a shell script without echoing

Maven:Non-resolvable parent POM and 'parent.relativePath' points at wrong local POM

Global variable Python classes

Run jQuery function onclick

How do I resolve a path relative to an ASP.NET MVC 4 application root?

Get URL of ASP.Net Page in code-behind

Get integer value from string in swift

How to sort a NSArray alphabetically?

Convert month name to month number in SQL Server

Uploading Files in ASP.net without using the FileUpload server control

MySQL: @variable vs. variable. What's the difference?

Conditional WHERE clause in SQL Server

What is __gxx_personality_v0 for?

PHP - Check if the page run on Mobile or Desktop browser

How to generate a random alpha-numeric string

How do I correct the character encoding of a file?

Listing contents of a bucket with boto3

wget/curl large file from google drive

Nov 2020

Getting "Could not find function xmlCheckVersion in library libxml2. Is libxml2 installed?" when installing lxml through pip

Cannot convert lambda expression to type 'string' because it is not a delegate type

Type-safe `JSON.parse`