I encountered this error when the JDK that I compiled the app under was different from the tomcat JVM. I verified that the Tomcat manager was running jvm 1.6.0 but the app was compiled under java 1.7.0.

After upgrading Java and changing JAVA_HOME in our startup script (/etc/init.d/tomcat) the error went away.

On ubuntu (version 18), some application support java 8 and do not support java 11. If this is the case , you can switch to java 8 by following instruction on below topic : https://askubuntu.com/questions/1133216/downgrading-java-11-to-java-8

If anyone else stuck on same point, following solved my problem.

In web.xml

 <listener>
            <listener-class>
                    org.springframework.web.context.request.RequestContextListener 
            </listener-class>
  </listener>

In Session component

@Component
@Scope(value = "session",  proxyMode = ScopedProxyMode.TARGET_CLASS)

In pom.xml

    <dependency>
        <groupId>cglib</groupId>
        <artifactId>cglib</artifactId>
        <version>3.1</version>
    </dependency>

.init/.fini isn't deprecated. It's still part of the the ELF standard and I'd dare say it will be forever. Code in .init/.fini is run by the loader/runtime-linker when code is loaded/unloaded. I.e. on each ELF load (for example a shared library) code in .init will be run. It's still possible to use that mechanism to achieve about the same thing as with __attribute__((constructor))/((destructor)). It's old-school but it has some benefits.

.ctors/.dtors mechanism for example require support by system-rtl/loader/linker-script. This is far from certain to be available on all systems, for example deeply embedded systems where code executes on bare metal. I.e. even if __attribute__((constructor))/((destructor)) is supported by GCC, it's not certain it will run as it's up to the linker to organize it and to the loader (or in some cases, boot-code) to run it. To use .init/.fini instead, the easiest way is to use linker flags: -init & -fini (i.e. from GCC command line, syntax would be -Wl -init my_init -fini my_fini).

On system supporting both methods, one possible benefit is that code in .init is run before .ctors and code in .fini after .dtors. If order is relevant that's at least one crude but easy way to distinguish between init/exit functions.

A major drawback is that you can't easily have more than one _init and one _fini function per each loadable module and would probably have to fragment code in more .so than motivated. Another is that when using the linker method described above, one replaces the original _init and _fini default functions (provided by crti.o). This is where all sorts of initialization usually occur (on Linux this is where global variable assignment is initialized). A way around that is described here

Notice in the link above that a cascading to the original _init() is not needed as it's still in place. The call in the inline assembly however is x86-mnemonic and calling a function from assembly would look completely different for many other architectures (like ARM for example). I.e. code is not transparent.

.init/.fini and .ctors/.detors mechanisms are similar, but not quite. Code in .init/.fini runs "as is". I.e. you can have several functions in .init/.fini, but it is AFAIK syntactically difficult to put them there fully transparently in pure C without breaking up code in many small .so files.

.ctors/.dtors are differently organized than .init/.fini. .ctors/.dtors sections are both just tables with pointers to functions, and the "caller" is a system-provided loop that calls each function indirectly. I.e. the loop-caller can be architecture specific, but as it's part of the system (if it exists at all i.e.) it doesn't matter.

The following snippet adds new function pointers to the .ctors function array, principally the same way as __attribute__((constructor)) does (method can coexist with __attribute__((constructor))).

#define SECTION( S ) __attribute__ ((section ( S )))
void test(void) {
   printf("Hello\n");
}
void (*funcptr)(void) SECTION(".ctors") =test;
void (*funcptr2)(void) SECTION(".ctors") =test;
void (*funcptr3)(void) SECTION(".dtors") =test;

One can also add the function pointers to a completely different self-invented section. A modified linker script and an additional function mimicking the loader .ctors/.dtors loop is needed in such case. But with it one can achieve better control over execution order, add in-argument and return code handling e.t.a. (In a C++ project for example, it would be useful if in need of something running before or after global constructors).

I'd prefer __attribute__((constructor))/((destructor)) where possible, it's a simple and elegant solution even it feels like cheating. For bare-metal coders like myself, this is just not always an option.

Some good reference in the book Linkers & loaders.

Just put the code ListView.Items.Clear(); on your method

You don't have to manipulate $PATH anymore!

From [email protected], npm ships with npx package which lets you run commands from a local node_modules/.bin or from a central cache.

Simply run:

$ npx [options] <command>[@version] [command-arg]...

By default, npx will check whether <command> exists in $PATH, or in the local project binaries, and execute that.

Calling npx <command> when <command> isn't already in your $PATH will automatically install a package with that name from the NPM registry for you, and invoke it. When it's done, the installed package won’t be anywhere in your globals, so you won’t have to worry about pollution in the long-term. You can prevent this behaviour by providing --no-install option.

For npm < 5.2.0, you can install npx package manually by running the following command:

$ npm install -g npx

If you really just want a random value from the available key range, use random.choice on the dictionary's values (converted to list form, if Python 3).

>>> from random import choice
>>> d = {1: 'a', 2: 'b', 3: 'c'}
>>>> choice(list(d.values()))

Disabling Lint warnings will easily get you into trouble later on. You're better off just specifying contentDescription for all of your ImageViews. If you don't need a description, then just use:

android:contentDescription="@null"

As mentioned in "Polling must die: triggering Jenkins builds from a git hook", you can notify Jenkins of a new commit:

With the latest Git plugin 1.1.14 (that I just release now), you can now do this more >easily by simply executing the following command:

curl http://yourserver/jenkins/git/notifyCommit?url=<URL of the Git repository>

This will scan all the jobs that’s configured to check out the specified URL, and if they are also configured with polling, it’ll immediately trigger the polling (and if that finds a change worth a build, a build will be triggered in turn.)

This allows a script to remain the same when jobs come and go in Jenkins.
Or if you have multiple repositories under a single repository host application (such as Gitosis), you can share a single post-receive hook script with all the repositories. Finally, this URL doesn’t require authentication even for secured Jenkins, because the server doesn’t directly use anything that the client is sending. It runs polling to verify that there is a change, before it actually starts a build.

As mentioned here, make sure to use the right address for your Jenkins server:

since we're running Jenkins as standalone Webserver on port 8080 the URL should have been without the /jenkins, like this:

http://jenkins:8080/git/notifyCommit?url=git@gitserver:tools/common.git

To reinforce that last point, ptha adds in the comments:

It may be obvious, but I had issues with:

curl http://yourserver/jenkins/git/notifyCommit?url=<URL of the Git repository>. 

The url parameter should match exactly what you have in Repository URL of your Jenkins job.
When copying examples I left out the protocol, in our case ssh://, and it didn't work.

You can also use a simple post-receive hook like in "Push based builds using Jenkins and GIT"

#!/bin/bash
/usr/bin/curl --user USERNAME:PASS -s \

http://jenkinsci/job/PROJECTNAME/build?token=1qaz2wsx

Configure your Jenkins job to be able to “Trigger builds remotely” and use an authentication token (1qaz2wsx in this example).

However, this is a project-specific script, and the author mentions a way to generalize it.
The first solution is easier as it doesn't depend on authentication or a specific project.

I want to check in change set whether at least one java file is there the build should start.
Suppose the developers changed only XML files or property files, then the build should not start.

Basically, your build script can:

• put a 'build' notes (see git notes) on the first call
• on the subsequent calls, grab the list of commits between HEAD of your branch candidate for build and the commit referenced by the git notes 'build' (git show refs/notes/build): git diff --name-only SHA_build HEAD.
• your script can parse that list and decide if it needs to go on with the build.
• in any case, create/move your git notes 'build' to HEAD.

May 2016: cwhsu points out in the comments the following possible url:

you could just use curl --user USER:PWD http://JENKINS_SERVER/job/JOB_NAME/build?token=YOUR_TOKEN if you set trigger config in your item

June 2016, polaretto points out in the comments:

I wanted to add that with just a little of shell scripting you can avoid manual url configuration, especially if you have many repositories under a common directory.
For example I used these parameter expansions to get the repo name

repository=${PWD%/hooks}; 
repository=${repository##*/} 

and then use it like:

curl $JENKINS_URL/git/notifyCommit?url=$GIT_URL/$repository

Unfortunately this is intentional…

This is a well know issue (at least in safari mobile), which is intentional, as it prevents other problems. Benjamin Poulain replied to a webkit bug:

This is completely intentional. It took quite a bit of work on our part to achieve this effect. :)

The base problem is this: the visible area changes dynamically as you scroll. If we update the CSS viewport height accordingly, we need to update the layout during the scroll. Not only that looks like shit, but doing that at 60 FPS is practically impossible in most pages (60 FPS is the baseline framerate on iOS).

It is hard to show you the “looks like shit” part, but imagine as you scroll, the contents moves and what you want on screen is continuously shifting.

Dynamically updating the height was not working, we had a few choices: drop viewport units on iOS, match the document size like before iOS 8, use the small view size, use the large view size.

From the data we had, using the larger view size was the best compromise. Most website using viewport units were looking great most of the time.

Nicolas Hoizey has researched this quite a bit: https://nicolas-hoizey.com/2015/02/viewport-height-is-taller-than-the-visible-part-of-the-document-in-some-mobile-browsers.html

No fix planned

At this point, there is not much you can do except refrain from using viewport height on mobile devices. Chrome changed to this as well in 2016:

• https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/BK0oHURgmJ4
• https://developers.google.com/web/updates/2016/12/url-bar-resizing

char(36) would be a good choice. Also MySQL's UUID() function can be used which returns a 36-character text format (hex with hyphens) which can be used for retrievals of such IDs from the db.

The easiest thing to do is to run your program directly instead of through the IDE. Open a command prompt (Start->Run->Cmd.exe->Enter), cd to the folder where your project is, and run the program from there. That way, when the program exits, the prompt window sticks around and you can read all of the output.

Alternatively, you can also re-direct standard output to a file, but that's probably not what you are going for here.

If the class which has the main method is extending/implementing another class/interface then it will not find the main class. Change the signature and it should work.

I had the same problem tried almost every answer from this thread non of them worked. Then this worked for me.

The suggested technique above in Dave's answer is certainly a good design practice, and yes ultimately the required permission must be set in the AndroidManifest.xml file to access the external storage.

However, the Mono-esque way to add most (if not all, not sure) "manifest options" is through the attributes of the class implementing the activity (or service).

The Visual Studio Mono plugin automatically generates the manifest, so its best not to manually tamper with it (I'm sure there are cases where there is no other option).

For example:

[Activity(Label="MonoDroid App", MainLauncher=true, Permission="android.permission.WRITE_EXTERNAL_STORAGE")]
public class MonoActivity : Activity
{
  protected override void OnCreate(Bundle bindle)
  {
    base.OnCreate(bindle);
  }
}

Somehow I got it to work by using margin-right, and setting it to move from right to left. http://jsfiddle.net/gXdMc/

Don't know why for this case, margin-right 100% doesn't go off the screen. :D (tested on chrome 18)

EDIT: now left to right works too http://jsfiddle.net/6LhvL/

How about if you're copying each column in a sheet to different sheets? Example: row B of mysheet to row B of sheet1, row C of mysheet to row B of sheet 2...

Since I was helped with my project by the answer above (I asked a duplicate question and was referred here), I am submitting an answer (my test code) for bracket notation when nesting within the var:

<html>_x000D_
<head>_x000D_
  <script type="text/javascript">_x000D_
    function displayFile(whatOption, whatColor) {_x000D_
      var Test01 = {_x000D_
        rectangle: {_x000D_
          red: "RectangleRedFile",_x000D_
          blue: "RectangleBlueFile"_x000D_
        },_x000D_
        square: {_x000D_
          red: "SquareRedFile",_x000D_
          blue: "SquareBlueFile"_x000D_
        }_x000D_
      };_x000D_
      var filename = Test01[whatOption][whatColor];_x000D_
      alert(filename);_x000D_
    }_x000D_
  </script>_x000D_
</head>_x000D_
<body>_x000D_
  <p onclick="displayFile('rectangle', 'red')">[ Rec Red ]</p>_x000D_
  <br/>_x000D_
  <p onclick="displayFile('square', 'blue')">[ Sq Blue ]</p>_x000D_
  <br/>_x000D_
  <p onclick="displayFile('square', 'red')">[ Sq Red ]</p>_x000D_
</body>_x000D_
</html>

The following steps work fine on macOS Sierra 10.12.4. Note that after brew installs Docker, the docker command (symbolic link) is not available at /usr/local/bin. Running the Docker app for the first time creates this symbolic link. See the detailed steps below.

1. Install Docker.

   brew cask install docker
   

2. Launch Docker.

   • Press ? + Space to bring up Spotlight Search and enter Docker to launch Docker.
   • In the Docker needs privileged access dialog box, click OK.
   • Enter password and click OK.

   When Docker is launched in this manner, a Docker whale icon appears in the status menu. As soon as the whale icon appears, the symbolic links for docker, docker-compose, docker-credential-osxkeychain and docker-machine are created in /usr/local/bin.

   $ ls -l /usr/local/bin/docker*
   lrwxr-xr-x  1 susam  domain Users  67 Apr 12 14:14 /usr/local/bin/docker -> /Users/susam/Library/Group Containers/group.com.docker/bin/docker
   lrwxr-xr-x  1 susam  domain Users  75 Apr 12 14:14 /usr/local/bin/docker-compose -> /Users/susam/Library/Group Containers/group.com.docker/bin/docker-compose
   lrwxr-xr-x  1 susam  domain Users  90 Apr 12 14:14 /usr/local/bin/docker-credential-osxkeychain -> /Users/susam/Library/Group Containers/group.com.docker/bin/docker-credential-osxkeychain
   lrwxr-xr-x  1 susam  domain Users  75 Apr 12 14:14 /usr/local/bin/docker-machine -> /Users/susam/Library/Group Containers/group.com.docker/bin/docker-machine
   

3. Click on the docker whale icon in the status menu and wait for it to show Docker is running.

   

4. Test that docker works fine.

   $ docker run hello-world
   Unable to find image 'hello-world:latest' locally
   latest: Pulling from library/hello-world
   78445dd45222: Pull complete
   Digest: sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7
   Status: Downloaded newer image for hello-world:latest
   
   Hello from Docker!
   This message shows that your installation appears to be working correctly.
   
   To generate this message, Docker took the following steps:
    1. The Docker client contacted the Docker daemon.
    2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    3. The Docker daemon created a new container from that image which runs the
       executable that produces the output you are currently reading.
    4. The Docker daemon streamed that output to the Docker client, which sent it
       to your terminal.
   
   To try something more ambitious, you can run an Ubuntu container with:
    $ docker run -it ubuntu bash
   
   Share images, automate workflows, and more with a free Docker ID:
    https://cloud.docker.com/
   
   For more examples and ideas, visit:
    https://docs.docker.com/engine/userguide/
   
   $ docker version
   Client:
    Version:      17.03.1-ce
    API version:  1.27
    Go version:   go1.7.5
    Git commit:   c6d412e
    Built:        Tue Mar 28 00:40:02 2017
    OS/Arch:      darwin/amd64
   
   Server:
    Version:      17.03.1-ce
    API version:  1.27 (minimum version 1.12)
    Go version:   go1.7.5
    Git commit:   c6d412e
    Built:        Fri Mar 24 00:00:50 2017
    OS/Arch:      linux/amd64
    Experimental: true
   

5. If you are going to use docker-machine to create virtual machines, install VirtualBox.

   brew cask install virtualbox
   

   Note that if VirtualBox is not installed, then docker-machine fails with the following error.

   $ docker-machine create manager
   Running pre-create checks...
   Error with pre-create check: "VBoxManage not found. Make sure VirtualBox is installed and VBoxManage is in the path"
   

another way

List<int> list=new List<int>();

IEnumerable<int> enumerable =Enumerable.Range(1, 300);  

foreach (var item in enumerable )  
{     
  list.add(item);  
}

Just wanted to add that if you want to add several parameters with the same key name for example: www.test.com/home?id=1&id=2

let params = new HttpParams();
params = params.append(key, value);

Use append, if you use set, it will overwrite the previous value with the same key name.

On Windows, start up Command Prompt (cmd.exe) or PowerShell (powershell.exe). To do this quickly, open a Run Command window by pressing Windows Key + R. In the Run Command window, type "cmd.exe" to launch Command Prompt; However, to start PowerShell instead, then type "powershell". If you are connecting your Android device to your computer using a USB cable, then you will need to check whether your device is communicating with adb by entering the command below:

# adb devices -l  

Next, pull (copy) the file from your Android device over to Windows. This can be accomplished by entering the following command:

# adb pull /sdcard/log.txt %HOME%\Desktop\log.txt  

Optionally, you may enter this command instead:

# adb pull /sdcard/log.txt C:\Users\admin\Desktop\log.txt 

UDPATE:

I've been working on an implementation to use both click and touchend events for the same function, and the function effectively blocks events if the type changes. My goal was to have a more responsive application interface - I wanted to reduce time for the event start to UI feedback loop.

For this implementation to work, the assumption is that you have all your related events added on 'click' and 'touchend'. This prevents one element from being deprived of event bubbling should both events be required to run, but are of different types.

Here is an lightweight API based implementation that I have simplified for demonstration purposes. It demonstrates how to use the functionality on a collapse element.

var tv = {
    /**
     * @method eventValidator()
     * @desc responsible for validating event of the same type.
     * @param {Object} e - event object
     * @param {Object} element - element event cache
     * @param {Function} callback - callback to invoke for events of the same type origin
     * @param {Object} [context] - context to pass to callback function
     * @param {Array} [args] - arguments array to pass in with context. Requires context to be passed
     * @return {Object} - new event cache
     */
    eventValidator: function(e, element, callback, context, args){
        if(element && element.type && element.type !== e.type){
            e.stopPropagation();
            e.preventDefault();
            return tv.createEventCacheObj({}, true);
        } else {
            element = tv.createEventCacheObj(e);
            (typeof context === "object" ? callback.apply(context, args) : callback());
            return element;
        }
    },

    /**
     * @method createEventCacheObj()
     * @param {Object} event - event object
     * @param {String} [event.type] - event type
     * @param {Number} [event.timeStamp] - time of event in MS since load
     * @param {Boolean} [reset=false] - flag to reset the object
     * @returns {{type: *, time: string}}
     */
    createEventCacheObj: function (event, reset){
        if(typeof reset !== 'boolean') reset = false;
        return {
            type: !reset ? event.type : null,
            time: !reset ? (event.timeStamp).toFixed(2): null
        };
    }
};

// Here is where the magic happens
var eventCache = [];
var pos = 0;

var $collapses = document.getElementsByClassName('tv-collapse__heading');
    Array.prototype.forEach.call($collapses, function(ele){
        ele.addEventListener('click', toggleCollapse);
        ele.addEventListener('touchend', toggleCollapse);

        // Cache mechanism
        ele.setAttribute('data-event-cache', String(pos++));
    });

/**
 * @func toggleCollapse()
 * @param {Object} e - event object
 * @desc responsible for toggling the state of a collapse element
 */
function toggleCollapse(e){
    eventCache[pos] = tv.eventValidator(e, eventCache[pos], function(){
       // Any event which isn't blocked will run the callback and its content
       // the context and arguments of the anonymous function match the event function context and arguments (assuming they are passed using the last two parameters of tv.eventValidator)

    }, this, arguments);
}

Original Answer:

Here is a response which is a modification of Rafael Fragoso's answer - pure JS.

(function(){_x000D_
  _x000D_
  button = document.getElementById('sayHi');_x000D_
  _x000D_
  button.addEventListener('touchstart', ohHai);_x000D_
  button.addEventListener('click', ohHai);_x000D_
_x000D_
  function ohHai(event){_x000D_
    event.stopPropagation();_x000D_
    event.preventDefault();_x000D_
    console.log('ohHai is:', event.type);_x000D_
  };_x000D_
})();

<!DOCTYPE html>_x000D_
<html lang="en">_x000D_
<head>_x000D_
    <meta charset="UTF-8">_x000D_
    <title>SO - Answer</title>_x000D_
</head>_x000D_
<body>_x000D_
  <button id="sayHi">Anyone there?</button>_x000D_
</body>_x000D_
</html>

Run the snippet on the following and pay attention to the output:

• Phone
• Tablet
• Tablet (Desktop Mode - if applicable)
• Desktop
• Desktop (Touch Screen - if applicable)

The key is we are stopping successive events from firing. Mobile browsers do their best to emulate a click when a touch happens. I wish I could find the link to an article a saw a while back that explains all the events that occur after touchstart through click. (I was searching for the 300ms delay between double tap and click actually firing).

Touch and Mouse Devices

I ran a couple of tests using a Surface Pro and a windows 10 desktop with a touchscreen. What I found was that they both triggered events as you would suspect, touchstart for touches and click for trackpad, mouse, and stylist. The interesting thing was that a touch event which was near, but not on the button, would triggering a click event without a touch event. It seems that the built in functionality in Windows 10 looks for the closest nodes within a radius and if a node is found it will fire a mouse based event.

Multiple Events of the Same Type

If two events of the same type are on an element, stopping the event from bubbling up could prevent one of the events from firing. There are a couple of different ways to handle this using some sort of cache. My initial thoughts were to modify the event object, but we get a reference so I'm thinking a cache solution will have to suffice.

public ActionResult GetAjaxValue()
{
   return Content("string value");
}

I'm agree with Vicente Plata you should try using jQuery IMHO is the best javascript library. You can create a class in your CSS file and just do the following with jquery:

$('#fName').addClass('name_of_the_class'); 

and that's all, and of course you won't be worried about incompatibility of the browsers, that's jquery's team problem :D LOL

i wanted to ask if Android Devices uses the network time protocol (ntp) to synchronize the time.

For general time synchronization, devices with telephony capability, where the wireless provider provides NITZ information, will use NITZ. My understanding is that NTP is used in other circumstances: NITZ-free wireless providers, WiFi-only, etc.

Your cited blog post suggests another circumstance: on-demand time synchronization in support of GPS. That is certainly conceivable, though I do not know whether it is used or not.

setTimeout will help you to execute any JavaScript code based on the time you set.

Syntax

setTimeout(code, millisec, lang)

Usage,

setTimeout("function1()", 1000);

For more details, see http://www.w3schools.com/jsref/met_win_settimeout.asp

If you actually want a static property of your class, that isn't currently supported in Swift. The current advice is to get around that by using global constants:

let testStr = "test"
let testStrLen = countElements(testStr)

class MyClass {
    func myFunc() {
    }
}

If you want these to be instance properties instead, you can use a lazy stored property for the length -- it will only get evaluated the first time it is accessed, so you won't be computing it over and over.

class MyClass {
    let testStr: String = "test"
    lazy var testStrLen: Int = countElements(self.testStr)

    func myFunc() {
    }
}

Solution:

Add the below line in your application tag:

android:usesCleartextTraffic="true"

As shown below:

<application
    ....
    android:usesCleartextTraffic="true"
    ....>

UPDATE: If you have network security config such as: android:networkSecurityConfig="@xml/network_security_config"

No Need to set clear text traffic to true as shown above, instead use the below code:

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="true">
        ....
        ....
    </domain-config>

    <base-config cleartextTrafficPermitted="false"/>
</network-security-config>  

Set the cleartextTrafficPermitted to true

Hope it helps.

Here is an example that reveals the logical problems that can occur when calling an overridable method in the super constructor.

class A {

    protected int minWeeklySalary;
    protected int maxWeeklySalary;

    protected static final int MIN = 1000;
    protected static final int MAX = 2000;

    public A() {
        setSalaryRange();
    }

    protected void setSalaryRange() {
        throw new RuntimeException("not implemented");
    }

    public void pr() {
        System.out.println("minWeeklySalary: " + minWeeklySalary);
        System.out.println("maxWeeklySalary: " + maxWeeklySalary);
    }
}

class B extends A {

    private int factor = 1;

    public B(int _factor) {
        this.factor = _factor;
    }

    @Override
    protected void setSalaryRange() {
        this.minWeeklySalary = MIN * this.factor;
        this.maxWeeklySalary = MAX * this.factor;
    }
}

public static void main(String[] args) {
    B b = new B(2);
    b.pr();
}

The result would actually be:

minWeeklySalary: 0

maxWeeklySalary: 0

This is because the constructor of class B first calls the constructor of class A, where the overridable method inside B gets executed. But inside the method we are using the instance variable factor which has not yet been initialized (because the constructor of A has not yet finished), thus factor is 0 and not 1 and definitely not 2 (the thing that the programmer might think it will be). Imagine how hard would be to track an error if the calculation logic was ten times more twisted.

I hope that would help someone.

try piping output of find (ie. the file path) into cpio

find . -type f -name '*.jpg' | cpio -p -d -v targetdir/

cpio checks timestamp on target files -- so its safe and fast.

remove -v for faster op, once you get used to it.

Surround your inline text with {{ }}.

Caveats:

1. You have to hit the spacebar after }}
2. You can't copy inline preformatted text and maintain it's look. If you do copy it you might not be able to add {{ }} to fix it. Just retype it or paste without formatting (Cmd ⌘+Shift+V on Mac) then add {{ }} and hit space.
3. If you add the {{ }} to existing text later, it can not be surrounded by other characters, e.g. if you want parenthesis around your preformatted text, you cannot fix (my text) by adding braces ({{my text}}). First add space around your text ( my text ) then add the {{ }}.

cout.fill('*');
cout << -12345 << endl; // print default value with no field width
cout << setw(10) << -12345 << endl; // print default with field width
cout << setw(10) << left << -12345 << endl; // print left justified
cout << setw(10) << right << -12345 << endl; // print right justified
cout << setw(10) << internal << -12345 << endl; // print internally justified

This produces the output:

-12345
****-12345
-12345****
****-12345
-****12345

You need to set the classpath to find your compiled class:

java -cp C:\Users\Matt\workspace\HelloWorld2\bin HelloWorld2

The fastest and easiest way is to use .as_matrix(). One short line:

df.iloc[:,[1,2,3]].as_matrix()

Gives:

array([[3, 2, 0.816497],
   [0, 'NaN', 'NaN'],
   [2, 51, 50.0]], dtype=object)

By using indices of the columns, you can use this code for any dataframe with different column names.

Here are the steps for your example:

import pandas as pd
columns = ['viz', 'a1_count', 'a1_mean', 'a1_std']
index = [0,1,2]
vals = {'viz': ['n','n','n'], 'a1_count': [3,0,2], 'a1_mean': [2,'NaN', 51], 'a1_std': [0.816497, 'NaN', 50.000000]}
df = pd.DataFrame(vals, columns=columns, index=index)

Gives:

   viz  a1_count a1_mean    a1_std
0   n         3       2  0.816497
1   n         0     NaN       NaN
2   n         2      51        50

Then:

x1 = df.iloc[:,[1,2,3]].as_matrix()

Gives:

array([[3, 2, 0.816497],
   [0, 'NaN', 'NaN'],
   [2, 51, 50.0]], dtype=object)

Where x1 is numpy.ndarray.

+-------------------+-----------------+------------------------------+
| Greedy quantifier | Lazy quantifier |        Description           |
+-------------------+-----------------+------------------------------+
| *                 | *?              | Star Quantifier: 0 or more   |
| +                 | +?              | Plus Quantifier: 1 or more   |
| ?                 | ??              | Optional Quantifier: 0 or 1  |
| {n}               | {n}?            | Quantifier: exactly n        |
| {n,}              | {n,}?           | Quantifier: n or more        |
| {n,m}             | {n,m}?          | Quantifier: between n and m  |
+-------------------+-----------------+------------------------------+

Add a ? to a quantifier to make it ungreedy i.e lazy.

Example:
test string : stackoverflow
greedy reg expression : s.*o output: stackoverflow
lazy reg expression : s.*?o output: stackoverflow

For me just adding the "LOCAL" Keyword did the trick, please see the attached image for easier solution.

My attached image contains both use cases:

(a) Where I was getting this error. (b) Where error was resolved by just adding "Local" keyword.

Try this:

<label id="lbltipAddedComment"></label>
<script type="text/javascript"> 
      document.getElementById('<%= lbltipAddedComment.ClientID %>').innerHTML = 'your tip has been submitted!';
</script>

Use

a = sorted(a, key=lambda x: x.modified, reverse=True)
#             ^^^^

On Python 2.x, the sorted function takes its arguments in this order:

sorted(iterable, cmp=None, key=None, reverse=False)

so without the key=, the function you pass in will be considered a cmp function which takes 2 arguments.

I do it in Kotlin like this:

open class BaseAppCompatActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener {

protected lateinit var drawerLayout: DrawerLayout
protected lateinit var navigationView: NavigationView
@Inject
lateinit var loginService: LoginService

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    Log.d("BaseAppCompatActivity", "onCreate()")
    App.getComponent().inject(this)
    drawerLayout = findViewById(R.id.drawer_layout) as DrawerLayout

    val toolbar = findViewById(R.id.toolbar) as Toolbar
    setSupportActionBar(toolbar)

    navigationView = findViewById(R.id.nav_view) as NavigationView
    navigationView.setNavigationItemSelectedListener(this)

    val toggle = ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close)

    drawerLayout.addDrawerListener(toggle)
    toggle.syncState()
    toggle.isDrawerIndicatorEnabled = true

    val navigationViewHeaderView = navigationView.getHeaderView(0)
    navigationViewHeaderView.login_txt.text = SharedKey.username
}
private inline fun <reified T: Activity> launch():Boolean{
    if(this is T) return closeDrawer()
    val intent = Intent(applicationContext, T::class.java)
    startActivity(intent)
    finish()
    return true
}

private fun closeDrawer(): Boolean {
    drawerLayout.closeDrawer(GravityCompat.START)
    return true
}
override fun onNavigationItemSelected(item: MenuItem): Boolean {
    val id = item.itemId

    when (id) {
        R.id.action_tasks -> {
            return launch<TasksActivity>()
        }
        R.id.action_contacts -> {
            return launch<ContactActivity>()
        }
        R.id.action_logout -> {
            createExitDialog(loginService, this)
        }
    }
    return false
}
}

Activities for drawer must inherit this BaseAppCompatActivity, call super.onCreate after content is set (actually, can be moved to some init method) and have corresponding elements for ids in their layout

To initialize long you need to append "L" to the end.
It can be either uppercase or lowercase.

All the numeric values are by default int. Even when you do any operation of byte with any integer, byte is first promoted to int and then any operations are performed.

Try this

byte a = 1; // declare a byte
a = a*2; //  you will get error here

You get error because 2 is by default int.
Hence you are trying to multiply byte with int. Hence result gets typecasted to int which can't be assigned back to byte.

You can use

a.Except(b).Union(b.Except(a));

Or you can use

var difference = new HashSet(a);
difference.SymmetricExceptWith(b);

DB2 LIST TABLES FOR SCHEMA <schema_name>

Just to share my idea...

I created a custom class to inherit the Label class. I added a private variable assigned as a Tooltip class and a public property, TooltipText. Then, gave it a MouseEnter delegate method. This is an easy way to work with multiple Label controls and not have to worry about assigning your Tooltip control for each Label control.

    public partial class ucLabel : Label
    {
        private ToolTip _tt = new ToolTip();

        public string TooltipText { get; set; }

        public ucLabel() : base() {
            _tt.AutoPopDelay = 1500;
            _tt.InitialDelay = 400;
//            _tt.IsBalloon = true;
            _tt.UseAnimation = true;
            _tt.UseFading = true;
            _tt.Active = true;
            this.MouseEnter += new EventHandler(this.ucLabel_MouseEnter);
        }

        private void ucLabel_MouseEnter(object sender, EventArgs ea)
        {
            if (!string.IsNullOrEmpty(this.TooltipText))
            {
                _tt.SetToolTip(this, this.TooltipText);
                _tt.Show(this.TooltipText, this.Parent);
            }
        }
    }

In the form or user control's InitializeComponent method (the Designer code), reassign your Label control to the custom class:

this.lblMyLabel = new ucLabel();

Also, change the private variable reference in the Designer code:

private ucLabel lblMyLabel;

Call AddWithoutValidation instead of Add (see this MSDN link).

Alternatively, I'm guessing the API you are using really only requires this for POST or PUT requests (not ordinary GET requests). In that case, when you call HttpClient.PostAsync and pass in an HttpContent, set this on the Headers property of that HttpContent object.

I fount a very simple solution:

<dependency>
    <groupId>com.cedarsoftware</groupId>
    <artifactId>json-io</artifactId>
    <version>4.5.0</version>
</dependency>

Java code:

import com.cedarsoftware.util.io.JsonWriter;
//...
String jsonString = "json_string_plain_text";
System.out.println(JsonWriter.formatJson(jsonString));

setenv.sh is better, because you can easily port such configuration from one machine to another, or from one Tomcat version to another. catalina.sh changes from one version of Tomcat to another. But you can keep your setenv.sh unchanged with any version of Tomcat.

Another advantage is, that it is easier to track the history of your changes if you add it to your backup or versioning system. If you look how you setenv.sh changes along the history, you will see only your own changes. Whereas if you use catalina.sh, you will always see not only your changes, but also changes that came with each newer version of the Tomcat.

The SublimeText 3 Column-Select plugin should be all you need. Install that, then make sure you have something like the following in your 'Default (OSX).sublime-keymap' file:

    // Column mode
    { "keys": ["ctrl+alt+up"], "command": "column_select", "args": {"by": "lines", "forward": false}},
    { "keys": ["ctrl+alt+down"], "command": "column_select", "args": {"by": "lines", "forward": true}},
    { "keys": ["ctrl+alt+pageup"], "command": "column_select", "args": {"by": "pages", "forward": false}},
    { "keys": ["ctrl+alt+pagedown"], "command": "column_select", "args": {"by": "pages", "forward": true}},
    { "keys": ["ctrl+alt+home"], "command": "column_select", "args": {"by": "all", "forward": false}},
    { "keys": ["ctrl+alt+end"], "command": "column_select", "args": {"by": "all", "forward": true}}

What exactly about it did not work for you?

For my case, I follow the steps from Firebase and by mistake I pated it in a wrong file.

Then, I returned to the project from Project to Android. Once in the Android view I pasted the file /projectname/app/YOUR-FILE-HERE and now, you have to compile again.

By default session object is available on jsp page(implicit object). It will not available in normal POJO java class. You can get the reference of HttpSession object on Servelt by using HttpServletRequest

HttpSession s=request.getSession()
s.setAttribute("name","value");

You can get session on an ActionSupport based Action POJO class as follows

 ActionContext ctx= ActionContext.getContext();
   Map m=ctx.getSession();
   m.put("name", value);

look at: http://ohmjavaclasses.blogspot.com/2011/12/access-session-in-action-class-struts2.html

For a typical example of employees owning one or more phones, see this wikibook section.

For your specific example, if you want to do a one-to-one relationship, you should change the next code in ReleaseDateType model:

@Column(nullable = true) 
private Integer media_Id;

for:

@OneToOne(fetch = FetchType.LAZY)
@JoinColumn(name="CACHE_MEDIA_ID", nullable=true)
private CacheMedia cacheMedia ;

and in CacheMedia model you need to add:

@OneToOne(cascade=ALL, mappedBy="ReleaseDateType")
private ReleaseDateType releaseDateType;

then in your repository you should replace:

@Query("Select * from A a  left join B b on a.id=b.id")
public List<ReleaseDateType> FindAllWithDescriptionQuery();

by:

//In this case a query annotation is not need since spring constructs the query from the method name
public List<ReleaseDateType> findByCacheMedia_Id(Integer id); 

or by:

@Query("FROM ReleaseDateType AS rdt WHERE cm.rdt.cacheMedia.id = ?1")    //This is using a named query method
public List<ReleaseDateType> FindAllWithDescriptionQuery(Integer id);

Or if you prefer to do a @OneToMany and @ManyToOne relation, you should change the next code in ReleaseDateType model:

@Column(nullable = true) 
private Integer media_Id;

for:

@OneToMany(cascade=ALL, mappedBy="ReleaseDateType")
private List<CacheMedia> cacheMedias ;

and in CacheMedia model you need to add:

@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name="RELEASE_DATE_TYPE_ID", nullable=true)
private ReleaseDateType releaseDateType;

then in your repository you should replace:

@Query("Select * from A a  left join B b on a.id=b.id")
public List<ReleaseDateType> FindAllWithDescriptionQuery();

by:

//In this case a query annotation is not need since spring constructs the query from the method name
public List<ReleaseDateType> findByCacheMedias_Id(Integer id); 

or by:

@Query("FROM ReleaseDateType AS rdt LEFT JOIN rdt.cacheMedias AS cm WHERE cm.id = ?1")    //This is using a named query method
public List<ReleaseDateType> FindAllWithDescriptionQuery(Integer id);

If you build your libraries with gradle, you can attach sources to the jars you create and then eclipse will automatically use them. See the answer by @MichaelOryl How to build sources jar with gradle.

Copied here for your reference:

jar {
    from sourceSets.main.allSource
}

The solution shown is for use with the gradle java plugin. Mileage may vary if you're not using that plugin.

Moving Dylan's comment into a full-blown answer because TOO USEFUL:

docker run --rm -v /var/run/docker.sock:/var/run/docker.sock assaflavie/runlike YOUR-CONTAINER

What does it do? Runs https://github.com/lavie/runlike inside a container, gets you the complete docker run command, then removes the container for you.

On windows:

1. Remove folder from C:\Users\USER.m2
2. Close and open the project or force a change on file: pom.xml for saving :)

There are subtle differences as to how the fileName you are passing is interpreted. Basically, you have 2 different methods: ClassLoader.getResourceAsStream() and Class.getResourceAsStream(). These two methods will locate the resource differently.

In Class.getResourceAsStream(path), the path is interpreted as a path local to the package of the class you are calling it from. For example calling, String.class.getResourceAsStream("myfile.txt") will look for a file in your classpath at the following location: "java/lang/myfile.txt". If your path starts with a /, then it will be considered an absolute path, and will start searching from the root of the classpath. So calling String.class.getResourceAsStream("/myfile.txt") will look at the following location in your class path ./myfile.txt.

ClassLoader.getResourceAsStream(path) will consider all paths to be absolute paths. So calling String.class.getClassLoader().getResourceAsStream("myfile.txt") and String.class.getClassLoader().getResourceAsStream("/myfile.txt") will both look for a file in your classpath at the following location: ./myfile.txt.

Everytime I mention a location in this post, it could be a location in your filesystem itself, or inside the corresponding jar file, depending on the Class and/or ClassLoader you are loading the resource from.

In your case, you are loading the class from an Application Server, so your should use Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName) instead of this.getClass().getClassLoader().getResourceAsStream(fileName). this.getClass().getResourceAsStream() will also work.

Read this article for more detailed information about that particular problem.

Warning for users of Tomcat 7 and below

One of the answers to this question states that my explanation seems to be incorrect for Tomcat 7. I've tried to look around to see why that would be the case.

So I've looked at the source code of Tomcat's WebAppClassLoader for several versions of Tomcat. The implementation of findResource(String name) (which is utimately responsible for producing the URL to the requested resource) is virtually identical in Tomcat 6 and Tomcat 7, but is different in Tomcat 8.

In versions 6 and 7, the implementation does not attempt to normalize the resource name. This means that in these versions, classLoader.getResourceAsStream("/resource.txt") may not produce the same result as classLoader.getResourceAsStream("resource.txt") event though it should (since that what the Javadoc specifies). [source code]

In version 8 though, the resource name is normalized to guarantee that the absolute version of the resource name is the one that is used. Therefore, in Tomcat 8, the two calls described above should always return the same result. [source code]

As a result, you have to be extra careful when using ClassLoader.getResourceAsStream() or Class.getResourceAsStream() on Tomcat versions earlier than 8. And you must also keep in mind that class.getResourceAsStream("/resource.txt") actually calls classLoader.getResourceAsStream("resource.txt") (the leading / is stripped).

The set statement doesn't treat spaces the way you expect; your variable is really named Pathname[space] and is equal to [space]C:\Program Files.

Remove the spaces from both sides of the = sign, and put the value in double quotes:

set Pathname="C:\Program Files"

Also, if your command prompt is not open to C:\, then using cd alone can't change drives.

Use

cd /d %Pathname%

or

pushd %Pathname%

instead.

The python 2.5 documentation explains it well.

Tuples and lists are compared lexicographically using comparison of corresponding elements. This means that to compare equal, each element must compare equal and the two sequences must be of the same type and have the same length.

If not equal, the sequences are ordered the same as their first differing elements. For example, cmp([1,2,x], [1,2,y]) returns the same as cmp(x,y). If the corresponding element does not exist, the shorter sequence is ordered first (for example, [1,2] < [1,2,3]).

Unfortunately that page seems to have disappeared in the documentation for more recent versions.

There's a new API introduced in API 19 (KitKat): ActivityManager.clearApplicationUserData().

I highly recommend using it in new applications:

import android.os.Build.*;
if (VERSION_CODES.KITKAT <= VERSION.SDK_INT) {
    ((ActivityManager)context.getSystemService(ACTIVITY_SERVICE))
            .clearApplicationUserData(); // note: it has a return value!
} else {
    // use old hacky way, which can be removed
    // once minSdkVersion goes above 19 in a few years.
}

If you don't want the hacky way you can also hide the button on the UI, so that functionality is just not available on old phones.

Knowledge of this method is mandatory for anyone using android:manageSpaceActivity.

Whenever I use this, I do so from a manageSpaceActivity which has android:process=":manager". There, I manually kill any other processes of my app. This allows me to let a UI stay running and let the user decide where to go next.

private static void killProcessesAround(Activity activity) throws NameNotFoundException {
    ActivityManager am = (ActivityManager)activity.getSystemService(Context.ACTIVITY_SERVICE);
    String myProcessPrefix = activity.getApplicationInfo().processName;
    String myProcessName = activity.getPackageManager().getActivityInfo(activity.getComponentName(), 0).processName;
    for (ActivityManager.RunningAppProcessInfo proc : am.getRunningAppProcesses()) {
        if (proc.processName.startsWith(myProcessPrefix) && !proc.processName.equals(myProcessName)) {
            android.os.Process.killProcess(proc.pid);
        }
    }
}

function getOriginalWidthOfImg(img_element) {
    var t = new Image();
    t.src = (img_element.getAttribute ? img_element.getAttribute("src") : false) || img_element.src;
    return t.width;
}

You don't need to remove style from the image or image dimensions attributes. Just create an element with javascript and get the created object width.

beware of the JavaScript specific definition of null. there are two definitions for "no value" in javascript. 1. Null: when a variable is null, it means it contains no data in it, but the variable is already defined in the code. like this:

var myEmptyValue = 1;
myEmptyValue = null;
if ( myEmptyValue === null ) { window.alert('it is null'); }
// alerts

in such case, the type of your variable is actually Object. test it.

window.alert(typeof myEmptyValue); // prints Object

2. Undefined: when a variable has not been defined before in the code, and as expected, it does not contain any value. like this:

   if ( myUndefinedValue === undefined ) { window.alert('it is undefined'); }
   // alerts
   

if such case, the type of your variable is 'undefined'.

notice that if you use the type-converting comparison operator (==), JavaScript will act equally for both of these empty-values. to distinguish between them, always use the type-strict comparison operator (===).

You can try this example out. A simple C# progaram to convert string to double

class Calculations{

protected double length;
protected double height;
protected double width;

public void get_data(){

this.length = Convert.ToDouble(Console.ReadLine());
this.width  = Convert.ToDouble(Console.ReadLine());
this.height = Convert.ToDouble(Console.ReadLine());

   }
}

Here is what I use.

Write-Host -NoNewLine 'Press any key to continue...';
$null = $Host.UI.RawUI.ReadKey('NoEcho,IncludeKeyDown');

An equivalent statement would be

select * from [TableName] limit 5

http://www.w3schools.com/sql/sql_top.asp

I would suggest reading this url http://docs.angularjs.org/api/ngResource/service/$resource

and revaluate how you are calling your delete method of your resources.

ideally you would want to be calling the delete of the resource item itself and by not passing the id of the resource into a catch all delete method

however $http.delete accepts a config object that contains both url and data properties you could either craft the query string there or pass an object/string into the data

maybe something along these lines

$http.delete('/roles/'+roleid, {data: input});

You can try one of this two methods.

string startupPath = System.IO.Directory.GetCurrentDirectory();

string startupPath = Environment.CurrentDirectory;

Tell me, which one seems to you better

So many wrong answers!

To specify the value that a form field should revert to upon resetting the form, use the following properties:

• Checkbox or radio button: defaultChecked
• Any other <input> control: defaultValue
• Option in a drop down list: defaultSelected

So, to specify the currently selected option as the default:

var country = document.getElementById("country");
country.options[country.selectedIndex].defaultSelected = true;

It may be a good idea to set the defaultSelected value for every option, in case one had previously been set:

var country = document.getElementById("country");
for (var i = 0; i < country.options.length; i++) {
    country.options[i].defaultSelected = i == country.selectedIndex;
}

Now, when the form is reset, the selected option will be the one you specified.

For anyone who doesn't like none of the solutions posted above like me then you can simply implement a timer yourself and stop the request execution by throwing a runtime exception. Something like below:

                  try 
                 {
                     timer.schedule(new TimerTask() {
                       @Override
                       public void run() {
                         timer.cancel();
                       }
                     }, /* specify time of the requst */ 1000);
                 }
                 catch(Exception e)
                 {
                   throw new RuntimeException("the request is taking longer than usual");
                 }

   

or preferably use the java guava timeLimiter here

This seems a very old question, but I am providing an answer, so that it might help others. You can specify the variables in the second screen in the form section, as shown below or in the RAW format by appending the variables as shown in the second image.

If your variable and variable values are valid, you should see a successful response in the response section.

An AngularJs directive for achieving this: To use it, add css class double-hscroll to your element. You will need jQuery and AngularJs for this.

import angular from 'angular';

var app = angular.module('plunker', []);
app.controller('MainCtrl', function($scope, $compile) {
  $scope.name = 'Dual wielded horizontal scroller';
});

app.directive('doubleHscroll', function($compile) {
  return {
restrict: 'C',
link: function(scope, elem, attr){

  var elemWidth = parseInt(elem[0].clientWidth);

  elem.wrap(`<div id='wrapscroll' style='width:${elemWidth}px;overflow:scroll'></div>`); 
  //note the top scroll contains an empty space as a 'trick' 
  $('#wrapscroll').before(`<div id='topscroll' style='height:20px; overflow:scroll;width:${elemWidth}px'><div style='min-width:${elemWidth}px'> </div></div>`);

  $(function(){
    $('#topscroll').scroll(function(){
      $("#wrapscroll").scrollLeft($("#topscroll").scrollLeft());
    });
    $('#wrapscroll').scroll(function() {
      $("#topscroll").scrollLeft($("#wrapscroll").scrollLeft());
    });

  });  

}

  };


});

You can do so from within vim and use its own windows or tabs.

One way to go is to utilize the built-in file explorer; activate it via :Explore, or :Texplore for a tabbed interface (which I find most comfortable).

:Texplore (and :Sexplore) will also guard you from accidentally exiting the current buffer (editor) on :q once you're inside the explorer.

To toggle between open tabs when using tab pages use gt or gT (next tab and previous tab, respectively).

See also Using tab pages on the vim wiki.

Same for end of week (in style of @Compile This's answer):

    public static DateTime EndOfWeek(this DateTime dt)
    {
        int diff = 7 - (int)dt.DayOfWeek;

        diff = diff == 7 ? 0 : diff;

        DateTime eow = dt.AddDays(diff).Date;

        return new DateTime(eow.Year, eow.Month, eow.Day, 23, 59, 59, 999) { };
    }

Microsoft recognized the future web open source paradigm and decided to open .NET to other operating systems. .NET Core is a .NET Framework for Mac and Linux. It is a “lightweight” .NET Framework, so some features/libraries are missing.

On Windows, I would still run .NET Framework and Visual Studio 2015. .NET Core is more friendly with the open source world like Node.js, npm, Yeoman, Docker, etc.

You can develop full-fledged web sites and RESTful APIs on Mac or Linux with Visual Studio Code + .NET Core which wasn't possible before. So if you love Mac or Ubuntu and you are a .NET developer then go ahead and set it up.

For Mono vs. .NET Core, Mono was developed as a .NET Framework for Linux which is now acquired by Microsoft (company called Xamarin) and used in mobile development. Eventually, Microsoft may merge/migrate Mono to .NET Core. I would not worry about Mono right now.

I faced this issue and was looking for the solution. Finally I was trying all the options from the https://github.com/mkleehammer/pyodbc/wiki/Connecting-to-SQL-Server-from-Windows , and for my MSSQL 12 only "{ODBC Driver 11 for SQL Server}" works. Just try it one by one. And the second important thing you have to get correct server name, because I thought preciously that I need to set \SQLEXPRESS in all of the cases, but found out that you have to set EXACTLY what you see in the server properties. Example on the screenshot:

Dirty trick: You could as well use lambda expression to pass any code you want including the call with parameters.

this.Include(includes, () =>
{
    _context.Cars.Include(<parameters>);
});

PhpEd is really good. You can step into/over/out of functions. You can run ad-hoc code, inspect variables, change variables. It is amazing.

No, there shouldn't be. However, it's possible there is differences in some browsers, so either (or neither) may not work in some case.

Simply do this:

IF EXISTS (SELECT * FROM tablename)
BEGIN
    DELETE from  tablename
    DBCC checkident ('tablename', reseed, 0)
END

Below is a Swift Playground example:

import UIKit

let jsonString = "{\"name\": \"John Doe\", \"phone\":123456}"

let data = jsonString.data(using: .utf8)

var jsonObject: Any
do {
    jsonObject = try JSONSerialization.jsonObject(with: data!) as Any

    if let obj = jsonObject as? NSDictionary {
        print(obj["name"])
    }
} catch {
    print("error")
}

Both

SuperClass.__init__(self, x)

or

super(SubClass,self).__init__( x )

will work (I prefer the 2nd one, as it adheres more to the DRY principle).

See here: http://docs.python.org/reference/datamodel.html#basic-customization

Set private int selected_position = -1; to prevent from any item being selected on start.

 @Override
 public void onBindViewHolder(final OrdersHolder holder, final int position) {
    final Order order = orders.get(position);
    holder.bind(order);
    if(selected_position == position){
        //changes background color of selected item in RecyclerView
        holder.itemView.setBackgroundColor(Color.GREEN);
    } else {
        holder.itemView.setBackgroundColor(Color.TRANSPARENT);
        //this updated an order property by status in DB
        order.setProductStatus("0");
    }
    holder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //status switch and DB update
            if (order.getProductStatus().equals("0")) {
                order.setProductStatus("1");
                notifyItemChanged(selected_position);
                selected_position = position;
                notifyItemChanged(selected_position);
             } else {
                if (order.getProductStatus().equals("1")){
                    //calls for interface implementation in
                    //MainActivity which opens a new fragment with 
                    //selected item details 
                    listener.onOrderSelected(order);
                }
             }
         }
     });
}

Your original problem was that you were checking if the list was null, which it would never be because you instantiated it with List<Integer> numbers = new ArrayList<Integer>();. However, you have updated your code to use the List.isEmpty() method to properly check if the list is empty.

The problem now is that you are never actually sending an empty list to giveList(). In your do-while loop, you add any input number to the list, even if it is -1. To prevent -1 being added, change the do-while loop to only add numbers if they are not -1. Then, the list will be empty if the user's first input number is -1.

do {
    number = Integer.parseInt(JOptionPane.showInputDialog("Enter a number (-1 to stop)"));
    /* Change this line */
    if (number != -1) numbers.add(number);
} while (number != -1);

we have to create your own docker volume mapped with the host directory before we mention in the docker-compose.yml as external

1.Create volume named share

docker volume create --driver local \
--opt type=none \
--opt device=/home/mukundhan/share \
--opt o=bind share

2.Use it in your docker-compose

version: "3"

volumes:
  share:
    external: true

services:
  workstation:
    container_name: "workstation"
    image: "ubuntu"
    stdin_open: true
    tty: true
    volumes:
      - share:/share:consistent
      - ./source:/source:consistent
    working_dir: /source
    ipc: host
    privileged: true
    shm_size: '2gb'
  db:
    container_name: "db"
    image: "ubuntu"
    stdin_open: true
    tty: true
    volumes:
      - share:/share:consistent
    working_dir: /source
    ipc: host

This way we can share the same directory with many services running in different containers

This only results in null if obj2 was already null before the cast, so your problem is earlier than you think. (Also, you need not construct a new ArrayList to initialize al1 if you're going to assign to it immediately. Just say ArrayList al1 = (ArrayList) obj2;.)

After viewing so many solution answers, here is my summary which works for me. I only installed workbench 6.2 at first, when connecting to localhost it failed.

step1: check if you have installed mysql server. If not, download and install.

step2: the mysql server configuration recommend strong password, ignore it, choose the legacy password.

step3: start mysql server (windows system: services-->mysql-->start)

step4: open workbench and create local connection.

Reading the R language documentation, as.integer has more to do with how the number is stored than if it is practically equivalent to an integer. is.integer tests if the number is declared as an integer. You can declare an integer by putting a L after it.

> is.integer(66L)
[1] TRUE
> is.integer(66)
[1] FALSE

Also functions like round will return a declared integer, which is what you are doing with x==round(x). The problem with this approach is what you consider to be practically an integer. The example uses less precision for testing equivalence.

> is.wholenumber(1+2^-50)
[1] TRUE
> check.integer(1+2^-50)
[1] FALSE

So depending on your application you could get into trouble that way.

Please refer the below-detailed explanation.

I have used Built-in data frame in R, called mtcars.

> mtcars 
               mpg cyl disp  hp drat   wt ... 
Mazda RX4     21.0   6  160 110 3.90 2.62 ... 
Mazda RX4 Wag 21.0   6  160 110 3.90 2.88 ... 
Datsun 710    22.8   4  108  93 3.85 2.32 ... 
           ............

The top line of the table is called the header which contains the column names. Each horizontal line afterward denotes a data row, which begins with the name of the row, and then followed by the actual data. Each data member of a row is called a cell.

single square bracket "[]" operator

To retrieve data in a cell, we would enter its row and column coordinates in the single square bracket "[]" operator. The two coordinates are separated by a comma. In other words, the coordinates begin with row position, then followed by a comma, and ends with the column position. The order is important.

Eg 1:- Here is the cell value from the first row, second column of mtcars.

> mtcars[1, 2] 
[1] 6

Eg 2:- Furthermore, we can use the row and column names instead of the numeric coordinates.

> mtcars["Mazda RX4", "cyl"] 
[1] 6 

Double square bracket "[[]]" operator

We reference a data frame column with the double square bracket "[[]]" operator.

Eg 1:- To retrieve the ninth column vector of the built-in data set mtcars, we write mtcars[[9]].

mtcars[[9]] [1] 1 1 1 0 0 0 0 0 0 0 0 ...

Eg 2:- We can retrieve the same column vector by its name.

mtcars[["am"]] [1] 1 1 1 0 0 0 0 0 0 0 0 ...

// Add this middleware
// error handler
app.use(function(err, req, res, next) {
 // set locals, only providing error in development
   res.locals.message = err.message;
   res.locals.error = req.app.get('env') === 'development' ? err : {};

 // render the error page
   res.status(err.status || 500);
   res.render('error');
  });

for ((i = 0 ; i < max ; i++ )); do echo "$i"; done

No. It is not possible to share the same port at a particular instant. But you can make your application such a way that it will make the port access at different instant.

Terminating a connection open with vagrant ssh will show the address, so a dummy or empty command can be executed:

$ vagrant ssh -c ''
Connection to 192.168.121.155 closed.

You can use Joda time library for Java. It would be much easier to calculate time-diff between dates with it.

Sample snippet for time-diff:

Days d = Days.daysBetween(startDate, endDate);
int days = d.getDays();

To return a resolved promise, you can use:

return $q.defer().resolve();

If you need to resolve something or return data:

return $q.defer().resolve(function(){

    var data;
    return data;

});

Perhaps a little off topic, just be informed that these kind of messages can also be seen when you are debugging your code with a breakpoint inside an async function like setTimeout like below:

[Violation] 'setTimeout' handler took 43129ms

That number (43129ms) depends on how long you stop in your async function

You could make a recursive function do the work

• Let L = size(M)
• Let idx = zeros(L,1)
• Take length(L) as the maximum depth
• Loop for idx(depth) = 1:L(depth)
• If your depth is length(L), do the element operation, else call the function again with depth+1

Not as fast as vectorized methods if you want to check all the points, but if you don't need to evaluate most of them it can be quite a time saver.

Yes, it is possible:

git clone https://github.com/pitosalas/st3_packages Packages 

You can specify the local root directory when using git clone.

<directory> 

The name of a new directory to clone into.
The "humanish" part of the source repository is used if no directory is explicitly given (repo for /path/to/repo.git and foo for host.xz:foo/.git).
Cloning into an existing directory is only allowed if the directory is empty.

As Chris comments, you can then rename that top directory.
Git only cares about the .git within said top folder, which you can get with various commands:

git rev-parse --show-toplevel git rev-parse --git-dir 

Is your application running as a 64 or 32bit process? You can check this in the task manager.

It could be, it is running as 32bit, even though the entire system is running on 64bit.

If 32bit, a third party library could be causing this. But first make sure your application is compiling for "Any CPU", as stated in the comments.

Hash map doesn't preserves the insertion order.
Example. Hashmap If you are inserting keys as

1  3
5  9
4   6
7   15
3   10

It can store it as

4  6
5  9
3  10
1  3
7  15

Linked Hashmap preserves the insertion order.

Example.
If you are inserting keys

1  3
5  9
4   6
7   15
3   10

It will store it as

1  3
5  9
4   6
7   15
3   10

same as we insert.

Tree map stores the vales in Increasing Order Of Keys. Example.
If you are inserting keys

1  3
5  9
4   6
7   15
3   10

It will store it as

1  3
3  10
4   6
5   9
7   15

Had the same problem. Turned out it was caused by iptables connection tracking on the upstream server. After removing --state NEW,ESTABLISHED,RELATED from the firewall script and flushing with conntrack -F the problem was gone.

Contributing to ferrix example,

class Battery():

    def __init__(self, battery_size = 60):
        self.battery_size = battery_size
    def get_range(self):
        if self.battery_size == 70:
            range = 240
        elif self.battery_size == 85:
        range = 270

        message = "This car can go approx " + str(range)
        message += "Fully charge"
        print(message)

My message will not execute, because none of my conditions are fulfill therefore receiving " UnboundLocalError: local variable 'range' referenced before assignment"

def get_range(self):
    if self.battery_size <= 70:
        range = 240
    elif self.battery_size >= 85:
        range = 270

@ECHO OFF
SETLOCAL ENABLEDELAYEDEXPANSION
SET /a pid=1600
FOR /f "skip=3delims=" %%a IN ('tasklist') DO (
 SET "found=%%a"
 SET /a foundpid=!found:~26,8!
 IF %pid%==!foundpid! echo found %pid%=!found:~0,24%!
)

GOTO :EOF

...set PID to suit your circumstance.

document.querySelector('select').onchange = function(){   
   alert(this.selectedOptions[0].getAttribute('data-attr')); 
};

I spent hours on this and finally figured it out. This problem happens if service account your sender application is using differs from the service account your receiver is using.

You can find out your receiver service account via Firebase -> Project Overview -> Project Settings -> Service Accounts and generate a new key and use that key when you are initializing your FirebaseApp in the sender:

FileInputStream serviceAccount = new FileInputStream("YOUR_PATH_TO_GENERATED_KEY.json");
GoogleCredentials googleCredentials = GoogleCredentials.fromStream(serviceAccount);
FirebaseOptions options = new FirebaseOptions.Builder().setCredentials(googleCredentials).build();
firebaseApp =  FirebaseApp.initializeApp(options);

This initialization need to be done once before you send push notifications.

In my case, I had done everything correctly and I still had this problem. I had made some changes in the "google-services.json" used in the receiver app and I noticed AndroidStudio was not using my new file. The solution was so simple:

AndroidStudio -> Build -> Clean Project and Build -> Rebuild Project

Your model is @Messages, change it to @message.

To change it like you should use migration:

def change   rename_table :old_table_name, :new_table_name end 

Of course do not create that file by hand but use rails generator:

rails g migration ChangeMessagesToMessage 

That will generate new file with proper timestamp in name in 'db dir. Then run:

rake db:migrate 

And your app should be fine since then.

I had the same problem of running a QT5 application in windows 10 ( VS2019). My error was

..\Debug\Qt5Cored.dll
Module: 5.14.1
File: kernel\qguiapplication.cpp
Line: 1249

This application failed to start because no Qt platform plugin could be initialized.
Reinstalling the application may fix this problem.

Solution

Since I was using QT msvc2017, I copied plugins folders from "C:\Qt\Qt5.14.1\5.14.1\msvc2017\plugins" location to the binary location

it worked.

Then check visual studio output window and identify the dlls loaded from plugin folder and removed unwanted dlls

brew install vim --override-system-vi

You can use tools own browser (Firefox, IE, Chrome...) to debug your JavaScript.

As for resizing, Firefox/Chrome has own resources accessible via Ctrl + Shift + I OR F12. Going tab "style editor" and clicking "adaptive/responsive design" icon.

Old Firefox versions

New Firefox/Firebug

Chrome

*Another way is to install an addon like "Web Developer"

Hopefully this is self explanatory enough. Use the comments in the code to help understand what is happening. Pass a single cell to this function. The value of that cell will be the base file name. If the cell contains "AwesomeData" then we will try and create a file in the current users desktop called AwesomeData.pdf. If that already exists then try AwesomeData2.pdf and so on. In your code you could just replace the lines filename = Application..... with filename = GetFileName(Range("A1"))

Function GetFileName(rngNamedCell As Range) As String
    Dim strSaveDirectory As String: strSaveDirectory = ""
    Dim strFileName As String: strFileName = ""
    Dim strTestPath As String: strTestPath = ""
    Dim strFileBaseName As String: strFileBaseName = ""
    Dim strFilePath As String: strFilePath = ""
    Dim intFileCounterIndex As Integer: intFileCounterIndex = 1

    ' Get the users desktop directory.
    strSaveDirectory = Environ("USERPROFILE") & "\Desktop\"
    Debug.Print "Saving to: " & strSaveDirectory

    ' Base file name
    strFileBaseName = Trim(rngNamedCell.Value)
    Debug.Print "File Name will contain: " & strFileBaseName

    ' Loop until we find a free file number
    Do
        If intFileCounterIndex > 1 Then
            ' Build test path base on current counter exists.
            strTestPath = strSaveDirectory & strFileBaseName & Trim(Str(intFileCounterIndex)) & ".pdf"
        Else
            ' Build test path base just on base name to see if it exists.
            strTestPath = strSaveDirectory & strFileBaseName & ".pdf"
        End If

        If (Dir(strTestPath) = "") Then
            ' This file path does not currently exist. Use that.
            strFileName = strTestPath
        Else
            ' Increase the counter as we have not found a free file yet.
            intFileCounterIndex = intFileCounterIndex + 1
        End If

    Loop Until strFileName <> ""

    ' Found useable filename
    Debug.Print "Free file name: " & strFileName
    GetFileName = strFileName

End Function

The debug lines will help you figure out what is happening if you need to step through the code. Remove them as you see fit. I went a little crazy with the variables but it was to make this as clear as possible.

In Action

My cell O1 contained the string "FileName" without the quotes. Used this sub to call my function and it saved a file.

Sub Testing()
    Dim filename As String: filename = GetFileName(Range("o1"))

    ActiveWorkbook.Worksheets("Sheet1").Range("A1:N24").ExportAsFixedFormat Type:=xlTypePDF, _
                                              filename:=filename, _
                                              Quality:=xlQualityStandard, _
                                              IncludeDocProperties:=True, _
                                              IgnorePrintAreas:=False, _
                                              OpenAfterPublish:=False
End Sub

Where is your code located in reference to everything else? Perhaps you need to make a module if you have not already and move your existing code into there.

From the Differences Between DTDs and Schema section of the Converting a DTD into a Schema article:

The critical difference between DTDs and XML Schema is that XML Schema utilize an XML-based syntax, whereas DTDs have a unique syntax held over from SGML DTDs. Although DTDs are often criticized because of this need to learn a new syntax, the syntax itself is quite terse. The opposite is true for XML Schema, which are verbose, but also make use of tags and XML so that authors of XML should find the syntax of XML Schema less intimidating.

The goal of DTDs was to retain a level of compatibility with SGML for applications that might want to convert SGML DTDs into XML DTDs. However, in keeping with one of the goals of XML, "terseness in XML markup is of minimal importance," there is no real concern with keeping the syntax brief.

[...]

So what are some of the other differences which might be especially important when we are converting a DTD? Let's take a look.

Typing

The most significant difference between DTDs and XML Schema is the capability to create and use datatypes in Schema in conjunction with element and attribute declarations. In fact, it's such an important difference that one half of the XML Schema Recommendation is devoted to datatyping and XML Schema. We cover datatypes in detail in Part III of this book, "XML Schema Datatypes."

[...]

Occurrence Constraints

Another area where DTDs and Schema differ significantly is with occurrence constraints. If you recall from our previous examples in Chapter 2, "Schema Structure" (or your own work with DTDs), there are three symbols that you can use to limit the number of occurrences of an element: *, + and ?.

[...]

Enumerations

So, let's say we had a element, and we wanted to be able to define a size attribute for the shirt, which allowed users to choose a size: small, medium, or large. Our DTD would look like this:

<!ELEMENT item (shirt)>
<!ELEMENT shirt (#PCDATA)>
<!ATTLIST shirt
    size_value (small | medium | large)>

[...]

But what if we wanted size to be an element? We can't do that with a DTD. DTDs do not provide for enumerations in an element's text content. However, because of datatypes with Schema, when we declared the enumeration in the preceding example, we actually created a simpleType called size_values which we can now use with an element:

<xs:element name="size" type="size_value">

[...]

For window user, Please run complete command to convert *.dot file to png:

C:\Program Files (x86)\Graphviz2.38\bin\dot.exe" -Tpng sampleTest.dot > sampletest.png.....

I have found a bug in solgraph that it is utilizing older version of solidity-parser that does not seem to be intelligent enough to capture new enhancement done for solidity programming language itself e.g. emit keyword for Event

According to bootstrap's documentation, the class is used to hide information intended only for screen readers from the layout of the rendered page.

Screen readers will have trouble with your forms if you don't include a label for every input. For these inline forms, you can hide the labels using the .sr-only class.

Here is an example styling used:

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

Is it important or can I remove it? Works fine without.

It's important, don't remove it.

You should always consider screen readers for accessibility purposes. Usage of the class will hide the element anyways, therefore you shouldn't see a visual difference.

If you're interested in reading about accessibility:

• Web Accessibility Initiative (WAI)

• MDN Accessibility documentation

Here is an example how I do it.

import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MultivaluedHashMap;
import javax.ws.rs.core.MultivaluedMap;
import java.util.Map;
import java.lang.reflect.Type;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

Gson gson = new Gson();
Type type = new TypeToken<Map<String, String>>() {
}.getType();
MultivaluedMap<String, String> formData = new MultivaluedHashMap<String, String>();
formData.add("key1", "value1");
formData.add("key1", "value2");
WebTarget webTarget = ClientBuilder.newClient().target("https://some.server.url/");
String response = webTarget.path("subpath/subpath2").request().post(Entity.form(formData), String.class);
Map<String, String> gsonResponse = gson.fromJson(response, type);

How to Run Valgrind

Not to insult the OP, but for those who come to this question and are still new to Linux—you might have to install Valgrind on your system.

sudo apt install valgrind  # Ubuntu, Debian, etc.
sudo yum install valgrind  # RHEL, CentOS, Fedora, etc.

Valgrind is readily usable for C/C++ code, but can even be used for other languages when configured properly (see this for Python).

To run Valgrind, pass the executable as an argument (along with any parameters to the program).

valgrind --leak-check=full \
         --show-leak-kinds=all \
         --track-origins=yes \
         --verbose \
         --log-file=valgrind-out.txt \
         ./executable exampleParam1

The flags are, in short:

• --leak-check=full: "each individual leak will be shown in detail"
• --show-leak-kinds=all: Show all of "definite, indirect, possible, reachable" leak kinds in the "full" report.
• --track-origins=yes: Favor useful output over speed. This tracks the origins of uninitialized values, which could be very useful for memory errors. Consider turning off if Valgrind is unacceptably slow.
• --verbose: Can tell you about unusual behavior of your program. Repeat for more verbosity.
• --log-file: Write to a file. Useful when output exceeds terminal space.

Finally, you would like to see a Valgrind report that looks like this:

HEAP SUMMARY:
    in use at exit: 0 bytes in 0 blocks
  total heap usage: 636 allocs, 636 frees, 25,393 bytes allocated

All heap blocks were freed -- no leaks are possible

ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)

I have a leak, but WHERE?

So, you have a memory leak, and Valgrind isn't saying anything meaningful. Perhaps, something like this:

5 bytes in 1 blocks are definitely lost in loss record 1 of 1
   at 0x4C29BE3: malloc (vg_replace_malloc.c:299)
   by 0x40053E: main (in /home/Peri461/Documents/executable)

Let's take a look at the C code I wrote too:

#include <stdlib.h>

int main() {
    char* string = malloc(5 * sizeof(char)); //LEAK: not freed!
    return 0;
}

Well, there were 5 bytes lost. How did it happen? The error report just says main and malloc. In a larger program, that would be seriously troublesome to hunt down. This is because of how the executable was compiled. We can actually get line-by-line details on what went wrong. Recompile your program with a debug flag (I'm using gcc here):

gcc -o executable -std=c11 -Wall main.c         # suppose it was this at first
gcc -o executable -std=c11 -Wall -ggdb3 main.c  # add -ggdb3 to it

Now with this debug build, Valgrind points to the exact line of code allocating the memory that got leaked! (The wording is important: it might not be exactly where your leak is, but what got leaked. The trace helps you find where.)

5 bytes in 1 blocks are definitely lost in loss record 1 of 1
   at 0x4C29BE3: malloc (vg_replace_malloc.c:299)
   by 0x40053E: main (main.c:4)

Techniques for Debugging Memory Leaks & Errors

• Make use of www.cplusplus.com! It has great documentation on C/C++ functions.
• General advice for memory leaks:
  • Make sure your dynamically allocated memory does in fact get freed.
  • Don't allocate memory and forget to assign the pointer.
  • Don't overwrite a pointer with a new one unless the old memory is freed.
• General advice for memory errors:
  • Access and write to addresses and indices you're sure belong to you. Memory errors are different from leaks; they're often just IndexOutOfBoundsException type problems.
  • Don't access or write to memory after freeing it.

• Sometimes your leaks/errors can be linked to one another, much like an IDE discovering that you haven't typed a closing bracket yet. Resolving one issue can resolve others, so look for one that looks a good culprit and apply some of these ideas:

  • List out the functions in your code that depend on/are dependent on the "offending" code that has the memory error. Follow the program's execution (maybe even in gdb perhaps), and look for precondition/postcondition errors. The idea is to trace your program's execution while focusing on the lifetime of allocated memory.
  • Try commenting out the "offending" block of code (within reason, so your code still compiles). If the Valgrind error goes away, you've found where it is.
• If all else fails, try looking it up. Valgrind has documentation too!

A Look at Common Leaks and Errors

Watch your pointers

60 bytes in 1 blocks are definitely lost in loss record 1 of 1
   at 0x4C2BB78: realloc (vg_replace_malloc.c:785)
   by 0x4005E4: resizeArray (main.c:12)
   by 0x40062E: main (main.c:19)

And the code:

#include <stdlib.h>
#include <stdint.h>

struct _List {
    int32_t* data;
    int32_t length;
};
typedef struct _List List;

List* resizeArray(List* array) {
    int32_t* dPtr = array->data;
    dPtr = realloc(dPtr, 15 * sizeof(int32_t)); //doesn't update array->data
    return array;
}

int main() {
    List* array = calloc(1, sizeof(List));
    array->data = calloc(10, sizeof(int32_t));
    array = resizeArray(array);

    free(array->data);
    free(array);
    return 0;
}

As a teaching assistant, I've seen this mistake often. The student makes use of a local variable and forgets to update the original pointer. The error here is noticing that realloc can actually move the allocated memory somewhere else and change the pointer's location. We then leave resizeArray without telling array->data where the array was moved to.

Invalid write

1 errors in context 1 of 1:
Invalid write of size 1
   at 0x4005CA: main (main.c:10)
 Address 0x51f905a is 0 bytes after a block of size 26 alloc'd
   at 0x4C2B975: calloc (vg_replace_malloc.c:711)
   by 0x400593: main (main.c:5)

And the code:

#include <stdlib.h>
#include <stdint.h>

int main() {
    char* alphabet = calloc(26, sizeof(char));

    for(uint8_t i = 0; i < 26; i++) {
        *(alphabet + i) = 'A' + i;
    }
    *(alphabet + 26) = '\0'; //null-terminate the string?

    free(alphabet);
    return 0;
}

Notice that Valgrind points us to the commented line of code above. The array of size 26 is indexed [0,25] which is why *(alphabet + 26) is an invalid write—it's out of bounds. An invalid write is a common result of off-by-one errors. Look at the left side of your assignment operation.

Invalid read

1 errors in context 1 of 1:
Invalid read of size 1
   at 0x400602: main (main.c:9)
 Address 0x51f90ba is 0 bytes after a block of size 26 alloc'd
   at 0x4C29BE3: malloc (vg_replace_malloc.c:299)
   by 0x4005E1: main (main.c:6)

And the code:

#include <stdlib.h>
#include <stdint.h>

int main() {
    char* destination = calloc(27, sizeof(char));
    char* source = malloc(26 * sizeof(char));

    for(uint8_t i = 0; i < 27; i++) {
        *(destination + i) = *(source + i); //Look at the last iteration.
    }

    free(destination);
    free(source);
    return 0;
}

Valgrind points us to the commented line above. Look at the last iteration here, which is
*(destination + 26) = *(source + 26);. However, *(source + 26) is out of bounds again, similarly to the invalid write. Invalid reads are also a common result of off-by-one errors. Look at the right side of your assignment operation.

The Open Source (U/Dys)topia

How do I know when the leak is mine? How do I find my leak when I'm using someone else's code? I found a leak that isn't mine; should I do something? All are legitimate questions. First, 2 real-world examples that show 2 classes of common encounters.

Jansson: a JSON library

#include <jansson.h>
#include <stdio.h>

int main() {
    char* string = "{ \"key\": \"value\" }";

    json_error_t error;
    json_t* root = json_loads(string, 0, &error); //obtaining a pointer
    json_t* value = json_object_get(root, "key"); //obtaining a pointer
    printf("\"%s\" is the value field.\n", json_string_value(value)); //use value

    json_decref(value); //Do I free this pointer?
    json_decref(root);  //What about this one? Does the order matter?
    return 0;
}

This is a simple program: it reads a JSON string and parses it. In the making, we use library calls to do the parsing for us. Jansson makes the necessary allocations dynamically since JSON can contain nested structures of itself. However, this doesn't mean we decref or "free" the memory given to us from every function. In fact, this code I wrote above throws both an "Invalid read" and an "Invalid write". Those errors go away when you take out the decref line for value.

Why? The variable value is considered a "borrowed reference" in the Jansson API. Jansson keeps track of its memory for you, and you simply have to decref JSON structures independent of each other. The lesson here: read the documentation. Really. It's sometimes hard to understand, but they're telling you why these things happen. Instead, we have existing questions about this memory error.

SDL: a graphics and gaming library

#include "SDL2/SDL.h"

int main(int argc, char* argv[]) {
    if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO) != 0) {
        SDL_Log("Unable to initialize SDL: %s", SDL_GetError());
        return 1;
    }

    SDL_Quit();
    return 0;
}

What's wrong with this code? It consistently leaks ~212 KiB of memory for me. Take a moment to think about it. We turn SDL on and then off. Answer? There is nothing wrong.

That might sound bizarre at first. Truth be told, graphics are messy and sometimes you have to accept some leaks as being part of the standard library. The lesson here: you need not quell every memory leak. Sometimes you just need to suppress the leaks because they're known issues you can't do anything about. (This is not my permission to ignore your own leaks!)

Answers unto the void

How do I know when the leak is mine?
It is. (99% sure, anyway)

How do I find my leak when I'm using someone else's code?
Chances are someone else already found it. Try Google! If that fails, use the skills I gave you above. If that fails and you mostly see API calls and little of your own stack trace, see the next question.

I found a leak that isn't mine; should I do something?
Yes! Most APIs have ways to report bugs and issues. Use them! Help give back to the tools you're using in your project!

Further Reading

Thanks for staying with me this long. I hope you've learned something, as I tried to tend to the broad spectrum of people arriving at this answer. Some things I hope you've asked along the way: How does C's memory allocator work? What actually is a memory leak and a memory error? How are they different from segfaults? How does Valgrind work? If you had any of these, please do feed your curiousity:

• More about malloc, C's memory allocator
• Definition of a segmentation fault
• Definition of a memory leak
• Definition of a memory access error
• How does Valgrind work?

You can also use 'name' instead of 'href' for a cleaner url:

    $('a[name^=#]').click(function(){
    var target = $(this).attr('name');
    if (target == '#')
      $('html, body').animate({scrollTop : 0}, 600);
    else
      $('html, body').animate({
        scrollTop: $(target).offset().top - 100
    }, 600);
});

Yes it is possible :) In fact let Internet Explorer do the dirty work for you ;)

TRIED AND TESTED

MY ASSUMPTIONS

1. I am assuming that the html text is in Cell A1 of Sheet1. You can also use a variable instead.
2. If you have a column full of html values, then simply put the below code in a loop

CODE (See NOTE at the end)

Sub Sample()
    Dim Ie As Object
    
    Set Ie = CreateObject("InternetExplorer.Application")
    
    With Ie
        .Visible = False
        
        .Navigate "about:blank"
        
        .document.body.InnerHTML = Sheets("Sheet1").Range("A1").Value
        
        .document.body.createtextrange.execCommand "Copy"
        ActiveSheet.Paste Destination:=Sheets("Sheet1").Range("A1")
        
        .Quit
    End With
End Sub

SNAPSHOT

NOTE: Thanks to @tiQu answer below. The above code will work with new IE if you replace .document.body.createtextrange.execCommand "Copy" with .ExecWB 17, 0: .ExecWB 12, 2 as suggested by him.

I've found this on the plugin's official site:

<div class="lazy" data-original="img/bmw_m1_hood.jpg" style="background-image: url('img/grey.gif'); width: 765px; height: 574px;"></div>

$("div.lazy").lazyload({
      effect : "fadeIn"
});

Source: http://www.appelsiini.net/projects/lazyload/enabled_background.html

$(':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.

Technically, putting null or 0, or just some random value there works (since you are not using the return value). However, why are you using this construct instead of the if construct? It is less obvious what you are trying to do when you write code this way, as you may confuse people with the no-op (null in your case).

a simpler way search downloads in the start menu and click on downloads in the search results to see where it will take you the drive will be highlighted in the explorer.

this error occurred sometime method attribute ( valid passing method ) Error option : method="get" but called by $Fname = $_POST["name"]; or

       method="post" but  called by  $Fname = $_GET["name"];

More info visit http://www.doordie.co.in/index.php

Excel VBA version below. I needed to implement this in VBA (not my preference, don't judge me!), and used the answers on this page for the approach. I'm uploading in case others also need a VBA version.

Option Explicit

Public Sub SumTarget()
    Dim numbers(0 To 6)  As Long
    Dim target As Long

    target = 15
    numbers(0) = 3: numbers(1) = 9: numbers(2) = 8: numbers(3) = 4: numbers(4) = 5
    numbers(5) = 7: numbers(6) = 10

    Call SumUpTarget(numbers, target)
End Sub

Public Sub SumUpTarget(numbers() As Long, target As Long)
    Dim part() As Long
    Call SumUpRecursive(numbers, target, part)
End Sub

Private Sub SumUpRecursive(numbers() As Long, target As Long, part() As Long)

    Dim s As Long, i As Long, j As Long, num As Long
    Dim remaining() As Long, partRec() As Long
    s = SumArray(part)

    If s = target Then Debug.Print "SUM ( " & ArrayToString(part) & " ) = " & target
    If s >= target Then Exit Sub

    If (Not Not numbers) <> 0 Then
        For i = 0 To UBound(numbers)
            Erase remaining()
            num = numbers(i)
            For j = i + 1 To UBound(numbers)
                AddToArray remaining, numbers(j)
            Next j
            Erase partRec()
            CopyArray partRec, part
            AddToArray partRec, num
            SumUpRecursive remaining, target, partRec
        Next i
    End If

End Sub

Private Function ArrayToString(x() As Long) As String
    Dim n As Long, result As String
    result = "{" & x(n)
    For n = LBound(x) + 1 To UBound(x)
        result = result & "," & x(n)
    Next n
    result = result & "}"
    ArrayToString = result
End Function

Private Function SumArray(x() As Long) As Long
    Dim n As Long
    SumArray = 0
    If (Not Not x) <> 0 Then
        For n = LBound(x) To UBound(x)
            SumArray = SumArray + x(n)
        Next n
    End If
End Function

Private Sub AddToArray(arr() As Long, x As Long)
    If (Not Not arr) <> 0 Then
        ReDim Preserve arr(0 To UBound(arr) + 1)
    Else
        ReDim Preserve arr(0 To 0)
    End If
    arr(UBound(arr)) = x
End Sub

Private Sub CopyArray(destination() As Long, source() As Long)
    Dim n As Long
    If (Not Not source) <> 0 Then
        For n = 0 To UBound(source)
                AddToArray destination, source(n)
        Next n
    End If
End Sub

Output (written to the Immediate window) should be:

SUM ( {3,8,4} ) = 15
SUM ( {3,5,7} ) = 15
SUM ( {8,7} ) = 15
SUM ( {5,10} ) = 15 

Potatoswatter's answer is all right, but I prefer to use find or lower_bound instead. lower_bound is especially useful because the iterator returned can subsequently be used for a hinted insertion, should you wish to insert something with the same key.

map<K, V>::iterator iter(my_map.lower_bound(key));
if (iter == my_map.end() || key < iter->first) {    // not found
    // ...
    my_map.insert(iter, make_pair(key, value));     // hinted insertion
} else {
    // ... use iter->second here
}

Well, the above answer is correct, auto_now_add and auto_now would do it, but it would be better to make an abstract class and use it in any model where you require created_at and updated_at fields.

class TimeStampMixin(models.Model):
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        abstract = True

Now anywhere you want to use it you can do a simple inherit and you can use timestamp in any model you make like.

class Posts(TimeStampMixin):
    name = models.CharField(max_length=50)
    ...
    ...

In this way, you can leverage object-oriented reusability, in Django DRY(don't repeat yourself)

Bootstrap sets the height of the navbar automatically to 50px. The padding above and below links is set to 15px. I think that bootstrap is adding padding to your logo.

You can either remove some of the padding above and below your logo or you can add more padding above and below links.

Adding more padding should look something like this:

nav.navbar-inverse>li>a {
 padding-top: 25px;
 padding-bottom: 25px;
}

A free and open source password manager that keeps all of your passwords safe in one place is "KeePass" and alternative to Windows Credential Manager.

This is a simple solution where we do not need to use JSON

public interface RegisterAPI {
@FormUrlEncoded
@POST("/RetrofitExample/insert.php")
public void insertUser(
        @Field("name") String name,
        @Field("username") String username,
        @Field("password") String password,
        @Field("email") String email,
        Callback<Response> callback);
}

method to send data

private void insertUser(){
    //Here we will handle the http request to insert user to mysql db
    //Creating a RestAdapter
    RestAdapter adapter = new RestAdapter.Builder()
            .setEndpoint(ROOT_URL) //Setting the Root URL
            .build(); //Finally building the adapter

    //Creating object for our interface
    RegisterAPI api = adapter.create(RegisterAPI.class);

    //Defining the method insertuser of our interface
    api.insertUser(

            //Passing the values by getting it from editTexts
            editTextName.getText().toString(),
            editTextUsername.getText().toString(),
            editTextPassword.getText().toString(),
            editTextEmail.getText().toString(),

            //Creating an anonymous callback
            new Callback<Response>() {
                @Override
                public void success(Response result, Response response) {
                    //On success we will read the server's output using bufferedreader
                    //Creating a bufferedreader object
                    BufferedReader reader = null;

                    //An string to store output from the server
                    String output = "";

                    try {
                        //Initializing buffered reader
                        reader = new BufferedReader(new InputStreamReader(result.getBody().in()));

                        //Reading the output in the string
                        output = reader.readLine();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

                    //Displaying the output as a toast
                    Toast.makeText(MainActivity.this, output, Toast.LENGTH_LONG).show();
                }

                @Override
                public void failure(RetrofitError error) {
                    //If any error occured displaying the error as toast
                    Toast.makeText(MainActivity.this, error.toString(),Toast.LENGTH_LONG).show();
                }
            }
    );
}

Now we can get the post request using php aur any other server side scripting.

Source Android Retrofit Tutorial

A clone is simply a copy of a repository. On the surface, its result is equivalent to svn checkout, where you download source code from some other repository. The difference between centralized VCS like Subversion and DVCSs like Git is that in Git, when you clone, you are actually copying the entire source repository, including all the history and branches. You now have a new repository on your machine and any commits you make go into that repository. Nobody will see any changes until you push those commits to another repository (or the original one) or until someone pulls commits from your repository, if it is publicly accessible.

A branch is something that is within a repository. Conceptually, it represents a thread of development. You usually have a master branch, but you may also have a branch where you are working on some feature xyz, and another one to fix bug abc. When you have checked out a branch, any commits you make will stay on that branch and not be shared with other branches until you merge them with or rebase them onto the branch in question. Of course, Git seems a little weird when it comes to branches until you look at the underlying model of how branches are implemented. Rather than explain it myself (I've already said too much, methinks), I'll link to the "computer science" explanation of how Git models branches and commits, taken from the Git website:

http://eagain.net/articles/git-for-computer-scientists/

A fork isn't a Git concept really, it's more a political/social idea. That is, if some people aren't happy with the way a project is going, they can take the source code and work on it themselves separate from the original developers. That would be considered a fork. Git makes forking easy because everyone already has their own "master" copy of the source code, so it's as simple as cutting ties with the original project developers and doesn't require exporting history from a shared repository like you might have to do with SVN.

EDIT: since I was not aware of the modern definition of "fork" as used by sites such as GitHub, please take a look at the comments and also Michael Durrant's answer below mine for more information.

If you want to apply the style even after getting struck-trough indication, you can use "!important" to enforce the style. It may not be a right solution but solve the problem.

Use time.mktime() to convert the time tuple (in localtime) into seconds since the Epoch, then use datetime.fromtimestamp() to get the datetime object.

from datetime import datetime
from time import mktime

dt = datetime.fromtimestamp(mktime(struct))

Use case wise the following seem to be easy to use and fast. Just set the page number.

use AdventureWorks
DECLARE @RowsPerPage INT = 10, @PageNumber INT = 6;
with result as(
SELECT SalesOrderDetailID, SalesOrderID, ProductID,
ROW_NUMBER() OVER (ORDER BY SalesOrderDetailID) AS RowNum
FROM Sales.SalesOrderDetail
where 1=1
)
select SalesOrderDetailID, SalesOrderID, ProductID from result
WHERE result.RowNum BETWEEN ((@PageNumber-1)*@RowsPerPage)+1
AND @RowsPerPage*(@PageNumber)

also without CTE

use AdventureWorks
DECLARE @RowsPerPage INT = 10, @PageNumber INT = 6
SELECT SalesOrderDetailID, SalesOrderID, ProductID
FROM (
SELECT SalesOrderDetailID, SalesOrderID, ProductID,
ROW_NUMBER() OVER (ORDER BY SalesOrderDetailID) AS RowNum
FROM Sales.SalesOrderDetail
where 1=1
 ) AS SOD
WHERE SOD.RowNum BETWEEN ((@PageNumber-1)*@RowsPerPage)+1
AND @RowsPerPage*(@PageNumber)

Here's a way to convert binary numbers to ASCII characters that is often simple enough to do in your head.

1 - Convert every 4 binary digits into one hex digit.

Here's a binary to hex conversion chart:

0001 = 1 
0010 = 2 
0011 = 3 
0100 = 4 
0101 = 5
0110 = 6
0111 = 7
1000 = 8

1001 = 9
1010 = a (the hex number a, not the letter a)
1011 = b
1100 = c
1101 = d
1110 = e
1111 = f

(The hexadecimal numbers a through f are the decimal numbers 10 through 15. That's what hexadecimal, or "base 16" is - instead of each digit being capable of representing 10 different numbers [0 - 9], like decimal or "base 10" does, each digit is instead capable of representing 16 different numbers [0 - f].)

Once you know that chart, converting any string of binary digits into a string of hex digits is simple.

For example,

01000100 = 0100 0100 = 44 hex
1010001001110011 = 1010 0010 0111 0011 = a273 hex

Simple enough, right? It is a simple matter to convert a binary number of any length into its hexadecimal equivalent.

(This works because hexadecimal is base 16 and binary is base 2 and 16 is the 4th power of 2, so it takes 4 binary digits to make 1 hex digit. 10, on the other hand, is not a power of 2, so we can't convert binary to decimal nearly as easily.)

2 - Split the string of hex digits into pairs.

When converting a number into ASCII, every 2 hex digits is a character. So break the hex string into sets of 2 digits.

You would split a hex number like 7340298b392 this into 6 pairs, like this:

7340298b392 = 07 34 02 98 b3 92

(Notice I prepended a 0, since I had an odd number of hex digits.)

That's 6 pairs of hex digits, so its going to be 6 letters. (Except I know right away that 98, b3 and 92 aren't letters. I'll explain why in a minute.)

3 - Convert each pair of hex digits into a decimal number.

Do this by multiplying the (decimal equivalent of the) left digit by 16, and adding the 2nd.

For example, b3 hex = 11*16 + 3, which is 110 + 66 + 3, which is 179. (b hex is 11 decimal.)

4 - Convert the decimal numbers into ASCII characters.

Now, to get the ASCII letters for the decimal numbers, simply keep in mind that in ASCII, 65 is an uppercase 'A', and 97 is a lowercase 'a'.

So what letter is 68?

68 is the 4th letter of the alphabet in uppercase, right?
65 = A, 66 = B, 67 = C, 68 = D.

So 68 is 'D'.

You take the decimal number, subtract 64 for uppercase letters if the number is less than 97, or 96 for lowercase letters if the number is 97 or larger, and that's the number of the letter of the alphabet associated with that set of 2 hex digits.

Alternatively, if you're not afraid of a little bit of easy hex arithmetic, you can skip step 3, and just go straight from hex to ASCII, by remembering, for example, that

hex 41 = 'A' 
hex 61 = 'a'

So subtract 40 hex for uppercase letters or 60 hex for lowercase letters, and convert what's left to decimal to get the alphabet letter number.

For example

01101100 = 6c, 6c - 60 = c = 12 decimal = 'l'
01010010 = 52, 52 - 40 = 12 hex = 18 decimal = 'R'

(When doing this, it's helpful to remember that 'm' (or 'M') is the 13 letter of the alphabet. So you can count up or down from 13 to find a letter that's nearer to the middle than to either end.)

I saw this on a shirt once, and was able to read it in my head:

01000100
01000001
01000100

I did it like this:

01000100 = 0100 0100 = 44 hex, - 40 hex = ucase letter 4 = D
01000001 = 0100 0001 = 41 hex, - 40 hex = ucase letter 1 = A
01000100 = 0100 0100 = 44 hex, - 40 hex = ucase letter 4 = D

The shirt said "DAD", which I thought was kinda cool, since it was being purchased by a pregnant woman. Her husband must be a geek like me.

How did I know right away that 92, b3, and 98 were not letters?

Because the ASCII code for a lowercase 'z' is 96 + 26 = 122, which in hex is 7a. 7a is the largest hex number for a letter. Anything larger than 7a is not a letter.

So that's how you can do it as a human.

How do computer programs do it?

For each set of 8 binary digits, convert it to a number, and look it up in an ASCII table.

(That's one pretty obvious and straight forward way. A typical programmer could probably think of 10 or 15 other ways in the space of a few minutes. The details depend on the computer language environment.)

import org.openqa.selenium.WebDriver;

import org.openqa.selenium.ie.*;

public class IEclass {



public static void main(String[] args) {

System.setProperty("webdriver.ie.driver","S:\\IE and Chrome ServerDriver\\IEDriverServer.exe");

WebDriver driver = new InternetExplorerDriver();

driver.get("https://www.google.com");
  }
    }

What about 1.1E10, +1, -0, etc? Parsing all possible numbers is trickier than many people think. If you want to include as many numbers are possible you should use the to_number function in a PL/SQL function. From http://www.oracle-developer.net/content/utilities/is_number.sql:

CREATE OR REPLACE FUNCTION is_number (str_in IN VARCHAR2) RETURN NUMBER IS
   n NUMBER;
BEGIN
   n := TO_NUMBER(str_in);
   RETURN 1;
EXCEPTION
   WHEN VALUE_ERROR THEN
      RETURN 0;
END;
/

I think this would do the trick:

function get_wp_installation()
{
    $full_path = getcwd();
    $ar = explode("wp-", $full_path);
    return $ar[0];
}

You can apply it to build any kind of array, like zeros:

a = range(5)
a = [i*0 for i in a]
print a 
[0, 0, 0, 0, 0]

If your page is deeply pathed or might move around and your JS script is at "~/JS/Registration.js" of your web folder, you can try the following:

<script src='<%=ResolveClientUrl("~/JS/Registration.js") %>' 
type="text/javascript"></script>

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

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

Try this solution:

for m in ["a", "á", "à", "ã", "â"]:
    try:
        somelist.remove(m)
    except:
        pass

Just for your information. and and or operators are also using to return values. It is useful when you need to assign value to variable but you have some pre-requirements

operator or returns first not null value

#init values
a,b,c,d = (1,2,3,None)

print(d or a or b or c)
#output value of a - 1

print(b or a or c or d)
#output value of b - 2

Operator and returns last value in the sequence if any of the members don't have None value or if they have at least one None value we get None

print(a and d and b and c)
#output: None

print(a or b or c)
#output value of c - 3

Try this:

cd 
source .bash_profile

There are 2 ways to pass parameters via GET method

Method 1 : The MVC approach where you pass the parameters like /routename/:paramname
In this case you can use req.params.paramname to get the parameter value For Example refer below code where I am expecting Id as a param
link could be like : http://myhost.com/items/23

var express = require('express');
var app = express();
app.get("items/:id", function(req, res) {
    var id = req.params.id;
    //further operations to perform
});
app.listen(3000);

Method 2 : General Approach : Passing variables as query string using '?' operator
For Example refer below code where I am expecting Id as a query parameter
link could be like : http://myhost.com/items?id=23

var express = require('express');
var app = express();
app.get("/items", function(req, res) {
    var id = req.query.id;
    //further operations to perform
});
app.listen(3000);

@tcaswell already answered, but I was in the middle of typing my answer up, so I'll go ahead and post it...

There are a number of different ways you could do this. To begin with, matplotlib will automatically cycle through colors. By default, it cycles through blue, green, red, cyan, magenta, yellow, black:

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0, 1, 10)
for i in range(1, 6):
    plt.plot(x, i * x + i, label='$y = {i}x + {i}$'.format(i=i))
plt.legend(loc='best')
plt.show()

If you want to control which colors matplotlib cycles through, use ax.set_color_cycle:

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0, 1, 10)
fig, ax = plt.subplots()
ax.set_color_cycle(['red', 'black', 'yellow'])
for i in range(1, 6):
    plt.plot(x, i * x + i, label='$y = {i}x + {i}$'.format(i=i))
plt.legend(loc='best')
plt.show()

If you'd like to explicitly specify the colors that will be used, just pass it to the color kwarg (html colors names are accepted, as are rgb tuples and hex strings):

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0, 1, 10)
for i, color in enumerate(['red', 'black', 'blue', 'brown', 'green'], start=1):
    plt.plot(x, i * x + i, color=color, label='$y = {i}x + {i}$'.format(i=i))
plt.legend(loc='best')
plt.show()

Finally, if you'd like to automatically select a specified number of colors from an existing colormap:

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0, 1, 10)
number = 5
cmap = plt.get_cmap('gnuplot')
colors = [cmap(i) for i in np.linspace(0, 1, number)]

for i, color in enumerate(colors, start=1):
    plt.plot(x, i * x + i, color=color, label='$y = {i}x + {i}$'.format(i=i))
plt.legend(loc='best')
plt.show()

A very general command prompt how to for java is

javac mainjava.java
java mainjava

You'll very often see people doing

javac *.java
java mainjava

As for the subclass problem that's probably occurring because a path is missing from your class path, the -c flag I believe is used to set that.

When using a wildcard, it had to be present on both sides of the refspec, so +refs/heads/*:refs/heads/master will not work. But you can use +HEAD:refs/heads/master:

git config remote.heroku.push +HEAD:refs/heads/master

Also, you can do this directly with git push:

git push heroku +HEAD:master
git push -f heroku HEAD:master

Similar to using ifilter, you could use a generator expression:

>>> (x for x in xrange(10) if x > 5).next()
6

In either case, you probably want to catch StopIteration though, in case no elements satisfy your condition.

Technically speaking, I suppose you could do something like this:

>>> foo = None
>>> for foo in (x for x in xrange(10) if x > 5): break
... 
>>> foo
6

It would avoid having to make a try/except block. But that seems kind of obscure and abusive to the syntax.

2.3.5 did not have input tap, just input keyevent and input text You can use the monkeyrunner for it: (this is a copy of the answer at https://stackoverflow.com/a/18959385/1587329):

You might want to use monkeyrunner like this:

$ monkeyrunner
>>> from com.android.monkeyrunner import MonkeyRunner, MonkeyDevice
>>> device = MonkeyRunner.waitForConnection()
>>> device.touch(200, 400, MonkeyDevice.DOWN_AND_UP)

You can also do a drag, start activies etc. Have a look at the api for MonkeyDevice.

The modulo operator evaluates to the remainder of the division of the two integer operands. Here are a few examples:

23 % 10 evaluates to 3 (because 23/10 is 2 with a remainder of 3)
50 % 50 evaluates to 0 (50/50 is 1 with a remainder of 0)
9 % 100 evaluates to 9 (9/100 is 0 with a remainder of 9)

Using your example where...

countries= [nan, 'USA', 'UK', 'France']

Since nan is not equal to nan (nan != nan) and countries[0] = nan, you should observe the following:

countries[0] == countries[0]
False

However,

countries[1] == countries[1]
True
countries[2] == countries[2]
True
countries[3] == countries[3]
True

Therefore, the following should work:

cleanedList = [x for x in countries if x == x]

This worked for me:

[XmlInclude(typeof(BankPayment))]
[Serializable]
public abstract class Payment { }    

[Serializable]
public class BankPayment : Payment {} 

[Serializable]
public class Payments : List<Payment>{}

XmlSerializer serializer = new XmlSerializer(typeof(Payments), new Type[]{typeof(Payment)});

The -i flag specifies the private key (.pem file) to use. If you don't specify that flag (as in your first command) it will use your default ssh key (usually under ~/.ssh/).

So in your first command, you are actually asking scp to upload the .pem file itself using your default ssh key. I don't think that is what you want.

Try instead with:

scp -r -i /Applications/XAMPP/htdocs/keypairfile.pem uploads/* ec2-user@publicdns:/var/www/html/uploads

=IFERROR(LEFT(A3, FIND(" ", A3, 1)), A3)

This will firstly check if the cell contains a space, if it does it will return the first value from the space, otherwise it will return the cell value.

Edit

Just to add to the above formula, as it stands if there is no value in the cell it would return 0. If you are looking to display a message or something to tell the user it is empty you could use the following:

=IF(IFERROR(LEFT(A3, FIND(" ", A3, 1)), A3)=0, "Empty", IFERROR(LEFT(A3, FIND(" ", A3, 1)), A3))

Code that works for both IDE's and .jar files:

import java.io.*;
import java.net.*;
import java.nio.file.*;
import java.util.*;
import java.util.stream.*;

public class ResourceWalker {
    public static void main(String[] args) throws URISyntaxException, IOException {
        URI uri = ResourceWalker.class.getResource("/resources").toURI();
        Path myPath;
        if (uri.getScheme().equals("jar")) {
            FileSystem fileSystem = FileSystems.newFileSystem(uri, Collections.<String, Object>emptyMap());
            myPath = fileSystem.getPath("/resources");
        } else {
            myPath = Paths.get(uri);
        }
        Stream<Path> walk = Files.walk(myPath, 1);
        for (Iterator<Path> it = walk.iterator(); it.hasNext();){
            System.out.println(it.next());
        }
    }
}

If the formatting template was read from a file, and you cannot ensure the content doubles the percent sign, then you probably have to detect the percent character and decide programmatically whether it is the start of a placeholder or not. Then the parser should also recognize sequences like %d (and other letters that can be used), but also %(xxx)s etc.

Similar problem can be observed with the new formats -- the text can contain curly braces.

ACID and BASE are consistency models for RDBMS and NoSQL respectively. ACID transactions are far more pessimistic i.e. they are more worried about data safety. In the NoSQL database world, ACID transactions are less fashionable as some databases have loosened the requirements for immediate consistency, data freshness and accuracy in order to gain other benefits, like scalability and resiliency.

BASE stands for -

• Basic Availability - The database appears to work most of the time.
• Soft-state - Stores don't have to be write-consistent, nor do different replicas have to be mutually consistent all the time.
• Eventual consistency - Stores exhibit consistency at some later point (e.g., lazily at read time).

Therefore BASE relaxes consistency to allow the system to process request even in an inconsistent state.

Example: No one would mind if their tweet were inconsistent within their social network for a short period of time. It is more important to get an immediate response than to have a consistent state of users' information.

if the map is short you can do:

ImmutableMap.of(key, value, key2, value2); // ...up to five k-v pairs

If it is longer then:

ImmutableMap.builder()
   .put(key, value)
   .put(key2, value2)
   // ...
   .build();

For those who are still looking for a simple answer to this; You can remove your file extension by using .htaccessbut this solution is just saving the day maybe even not. Because when user copies the URL from address bar or tries to reload or even coming back from history, your standart Apache Router will not be able to realize what are you looking for and throw you a 404 Error. You need a dedicated Router for this purpose to make your app understand what does the URL actually means by saying something Server and File System has no idea about.

I leave here my solution for this. This is tested and used many times for my clients and for my projects too. It supports multi language and language detection too. Read Readme file is recommended. It also provides you a good structure to have a tidy project with differenciated language files (you can even have different designs for each language) and separated css,js and phpfiles even more like images or whatever you have.

Cr8Router - Simple PHP Router

READ THIS IF YOU USE Crashlytics AND ARE HAVING THIS ISSUE...

I was having the same issue as above Command /bin/sh failed with exit code 1 more specifically [31merror: Could not fetch upload-symbols settings: An unknown error occurred fetching settings.[0m

The first solution (enabling the run script only when installing) allowed me to build my target in the simulator, but I could not archive my build.

I solved this Archive issue by enabling Crashlytics on firebase. I am still used to Fabric where Crashlytics is automatically enabled. Once I enabled Crashlytics in the firebase console for the corresponding GoogleService-Info.plist I was able to Archive without this error.

You can use the instanceof operator:

if (obj instanceof jQuery){
    console.log('object is jQuery');
}

Explanation: the jQuery function (aka $) is implemented as a constructor function. Constructor functions are to be called with the new prefix.

When you call $(foo), internally jQuery translates this to new jQuery(foo)¹. JavaScript proceeds to initialize this inside the constructor function to point to a new instance of jQuery, setting it's properties to those found on jQuery.prototype (aka jQuery.fn). Thus, you get a new object where instanceof jQuery is true.

¹_{It's actually new jQuery.prototype.init(foo): the constructor logic has been offloaded to another constructor function called init, but the concept is the same.}

with open(destPath+'\\'+csvXML, 'a+') as csvFile:
    writer = csv.writer(csvFile, delimiter=';', lineterminator='\r')
    writer.writerows(xmlList)

The "lineterminator='\r'" permit to pass to next row, without empty row between two.

In VB.NET, you can apply multiple conditions even if the other conditions don't apply to the Select parameter. See below:

Select Case parameter 
    Case "userID"
                ' does something here.
        Case "packageID"
                ' does something here.
        Case "mvrType" And otherFactor
                ' does something here. 
        Case Else 
                ' does some processing... 
End Select

Have you tried using the concat() function?

ON tableTwo.query = concat('category_id=',tableOne.category_id)

//display sample reg form in notepad.txt
using (StreamWriter stream = new FileInfo("D:\\tt.txt").AppendText())//ur file location//.AppendText())
{
   stream.WriteLine("Name :" + textBox1.Text);//display textbox data in notepad
   stream.WriteLine("DOB : " + dateTimePicker1.Text);//display datepicker data in notepad
   stream.WriteLine("DEP:" + comboBox1.SelectedItem.ToString());
   stream.WriteLine("EXM :" + listBox1.SelectedItem.ToString());
}

Thought I'd give a full answer combining some of the possible intricacies required for completeness.

1. Check if you have 32-bit or 64-bit IIS installed:
   • Go to IIS Manager ? Application Pools, choose the appropriate app pool then Advanced Settings.
   • Check the setting "Enable 32-bit Applications". If that's true, that means the worker process is forced to run in 32-bit. If the setting is false, then the app pool is running in 64-bit mode.
   • You can also open up Task Manager and check w3wp.exe. If it's showing as w3wp*32.exe then it's 32-bit.
2. Download the appropriate version here: https://www.iis.net/downloads/microsoft/url-rewrite#additionalDownloads.
3. Install it.
4. Close and reopen IIS Manager to ensure the URL Rewrite module appears.

I would recommend the following.

<button [disabled]="isInvalid()">Submit</button>

use split

Split a file into fixed-size pieces, creates output files containing consecutive sections of INPUT (standard input if none is given or INPUT is `-')

Syntax split [options] [INPUT [PREFIX]]

http://ss64.com/bash/split.html

Not too hard to explain... This is like typing hello worl, hitting the left-arrow key twice, typing d, and hitting the down-arrow key.

At least, that is how I infer your terminal is interpeting the \b and \n codes.

Redirect the output to a file and I bet you get something else entirely. Although you may have to look at the file's bytes to see the difference.

[edit]

To elaborate a bit, this printf emits a sequence of bytes: hello worl^H^Hd^J, where ^H is ASCII character #8 and ^J is ASCII character #10. What you see on your screen depends on how your terminal interprets those control codes.

Deletion is always a challenging task and can be dangerous!!! Therefore, first execute the following command to see what will happen:

git push --all --prune --dry-run

By doing so like the above, git will provide you with a list of what would happen if the below command is executed.

Then run the following command to remove all branches from the remote repo that are not in your local repo:

git push --all --prune

Fast enumeration was added in 10.5 and in the iPhone OS, and it's significantly faster, not just syntactic sugar. If you have to target the older runtime (i.e. 10.4 and backwards), you'll have to use the old method of enumerating:

NSDictionary *myDict = ... some keys and values ...
NSEnumerator *keyEnum = [myDict keyEnumerator];
id key;

while ((key = [keyEnum nextObject]))
{
    id value = [myDict objectForKey:key];
    ... do work with "value" ...
}

You don't release the enumerator object, and you can't reset it. If you want to start over, you have to ask for a new enumerator object from the dictionary.

This is a take on Mike W's answer:

internal static DateTime GetPreviousMonth(bool returnLastDayOfMonth)
{
    DateTime firstDayOfThisMonth = DateTime.Today.AddDays( - ( DateTime.Today.Day - 1 ) );
    DateTime lastDayOfLastMonth = firstDayOfThisMonth.AddDays (-1);
    if (returnLastDayOfMonth) return lastDayOfLastMonth;
    return firstDayOfThisMonth.AddMonths(-1);
}

You can call it like so:

dateTimePickerFrom.Value = GetPreviousMonth(false);
dateTimePickerTo.Value = GetPreviousMonth(true);

I got the same problem and my solution was to remove webconfig file from the directory.. then it works..

Just added to the answer from Kunal Mathur and an answer to @mockash, since I cannot comment due to lack of reputation.

Before you type: pip install package_name, you need to change the directory to the folder where pip.exe is. for example:

Open Visual C++ 2015 x86 x64 Cross Build Tools Command Prompt--> change directory cd C:\Users\Test\AppData\Local\Programs\Python\Python36-32\Scripts-->Type: pip install package_name

But the weird thing is I can only successfully install via 'Visual C++ 2015 x64 x86' not 'x86 x64'

may be:

UIImage *img = [[UIImage alloc] init];

and when you want to change the image:

img = [UIImage imageNamed:@"nameOfPng.png"];

but the object wasn't in the same place in the memory, but if you use the pointer, the same pointer will be point to the last image loaded.

I assume you know how to get the DOM object for the <a> element (use document.getElementById or some other method).

To add any attribute, just use the setAttribute method on the DOM object:

a = document.getElementById(...);
a.setAttribute("href", "somelink url");

For Laravel 2020. Ok, an example:

<form class="modal-content animate" action="{{ url('login_kun')  }}" method="post">
  @csrf   // !!! attention - this string is a must 
....
 </form>

And then in web.php:

Route::post("/login_kun", "LoginController@login");

And one more in new created LoginController:

 public function login(Request $request){
    dd($request->all());
}

and you are done my friend.

As of Python 3.7 the following code works fine:

from json import dumps
result = {"symbol": "ƒ"}
json_string = dumps(result, sort_keys=True, indent=2, ensure_ascii=False)
print(json_string)

Output:

{"symbol": "ƒ"}

Hashing is a one-way function, meaning that once you hash a password it is very difficult to get the original password back from the hash. Encryption is a two-way function, where it's much easier to get the original text back from the encrypted text.

Plain hashing is easily defeated using a dictionary attack, where an attacker just pre-hashes every word in a dictionary (or every combination of characters up to a certain length), then uses this new dictionary to look up hashed passwords. Using a unique random salt for each hashed password stored makes it much more difficult for an attacker to use this method. They would basically need to create a new unique dictionary for every salt value that you use, slowing down their attack terribly.

It's unsafe to store passwords using an encryption algorithm because if it's easier for the user or the administrator to get the original password back from the encrypted text, it's also easier for an attacker to do the same.

The biggest difference between Task.Delay and Thread.Sleep is that Task.Delay is intended to run asynchronously. It does not make sense to use Task.Delay in synchronous code. It is a VERY bad idea to use Thread.Sleep in asynchronous code.

Normally you will call Task.Delay() with the await keyword:

await Task.Delay(5000);

or, if you want to run some code before the delay:

var sw = new Stopwatch();
sw.Start();
Task delay = Task.Delay(5000);
Console.WriteLine("async: Running for {0} seconds", sw.Elapsed.TotalSeconds);
await delay;

Guess what this will print? Running for 0.0070048 seconds. If we move the await delay above the Console.WriteLine instead, it will print Running for 5.0020168 seconds.

Let's look at the difference with Thread.Sleep:

class Program
{
    static void Main(string[] args)
    {
        Task delay = asyncTask();
        syncCode();
        delay.Wait();
        Console.ReadLine();
    }

    static async Task asyncTask()
    {
        var sw = new Stopwatch();
        sw.Start();
        Console.WriteLine("async: Starting");
        Task delay = Task.Delay(5000);
        Console.WriteLine("async: Running for {0} seconds", sw.Elapsed.TotalSeconds);
        await delay;
        Console.WriteLine("async: Running for {0} seconds", sw.Elapsed.TotalSeconds);
        Console.WriteLine("async: Done");
    }

    static void syncCode()
    {
        var sw = new Stopwatch();
        sw.Start();
        Console.WriteLine("sync: Starting");
        Thread.Sleep(5000);
        Console.WriteLine("sync: Running for {0} seconds", sw.Elapsed.TotalSeconds);
        Console.WriteLine("sync: Done");
    }
}

Try to predict what this will print...

async: Starting
async: Running for 0.0070048 seconds
sync: Starting
async: Running for 5.0119008 seconds
async: Done
sync: Running for 5.0020168 seconds
sync: Done

Also, it is interesting to notice that Thread.Sleep is far more accurate, ms accuracy is not really a problem, while Task.Delay can take 15-30ms minimal. The overhead on both functions is minimal compared to the ms accuracy they have (use Stopwatch Class if you need something more accurate). Thread.Sleep still ties up your Thread, Task.Delay release it to do other work while you wait.

You cannot have the WHERE clause in an INSERT statement.

insert into table1(data) VALUES(:data) where sno ='45830'

Should be

insert into table1(data) VALUES(:data)

Update: You have removed that from your code (I assume you copied the code in wrong). You want to increase your allowed packet size:

SET GLOBAL max_allowed_packet=32M

Change the 32M (32 megabytes) up/down as required. Here is a link to the MySQL documentation on the subject.

You can also create a project repository. It's useful if more developers are working on the same project, and the library must be included in the project.

• First, create a repository structure in your project's lib directory, and then copy the library into it. The library must have following name-format: <artifactId>-<version>.jar

  <your_project_dir>/lib/com/microsoft/sqlserver/<artifactId>/<version>/

• Create pom file next to the library file, and put following information into it:

  <?xml version="1.0" encoding="UTF-8"?>
   <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
       <modelVersion>4.2.0</modelVersion>
       <groupId>com.microsoft.sqlserver</groupId>
       <artifactId>sqljdbc4</artifactId>
       <version>4.2</version>
   </project>
   

• At this point, you should have this directory structure:

  <your_project_dir>/lib/com/microsoft/sqlserver/sqljdbc4/4.2/sqljdbc4-4.2.jar <your_project_dir>/lib/com/microsoft/sqlserver/sqljdbc4/4.2/sqljdbc4-4.2.pom

• Go to your project's pom file and add new repository:

  <repositories>
       <repository>
           <id>Project repository</id>
           <url>file://${basedir}/lib</url>
       </repository>
   </repositories>
   

• Finally, add a dependency on the library:

  <dependencies>
       <dependency>
           <groupId>com.microsoft.sqlserver</groupId>
           <artifactId>sqljdbc4</artifactId>
           <version>4.2</version>
       </dependency>
   </dependencies>
   

Update 2017-03-04

It seems like the library can be obtained from publicly available repository. @see nirmal's and Jacek Grzelaczyk's answers for more details.

Update 2020-11-04

Currently Maven has a convenient target install which allow you to deploy an existing package into a project / file repository without the need of creating POM files manually. It will generate those files for you.

mvn install:install-file \
    -Dfile=sqljdbc4.jar \
    -DgroupId=com.microsoft.sqlserver \
    -DartifactId=sqljdbc4 \
    -Dversion=4.2 \
    -Dpackaging=jar \
    -DlocalRepositoryPath=${your_project_dir}/lib

+1 to user Short for an answer that worked for me!

I tried to do some debugging of this with msbuild /v:diag, and I'm seeing that MSBuild is trying to embed a manifest in the executable, with <somename>.dll.embed.manifest.res on the linker command line, where that is a resource file built from <somename>.dll.embed.manifest. But the manifest file is an empty Unicode text file. (That is, a two-byte file with the Unicode 0xFEFF prefix)

So the root problem seems to have something to do with that manifest file not being generated, or it being used when <somename>.dll.intermediate.manifest should have been used.

An alternate solution seems to be to turn off the "Embed Manifest" option under Properties, Manifest Tool, Input and Output.

I got the same same error.

I was using gmail account and Google's SMTP server to send emails. The problem was due to SMTP server refusing to authorize as it considered my web host (through whom I sent email) as an intruder.

I followed Google's process to identify my web host as an valid entity to send email through my account and problem was solved.

I like Consolas a lot. This top-10 list is a good resource for others. It includes examples and descriptions.

I found that subplots_adjust(hspace = 0.001) is what ended up working for me. When I use space = None, there is still white space between each plot. Setting it to something very close to zero however seems to force them to line up. What I've uploaded here isn't the most elegant piece of code, but you can see how the hspace works.

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.ticker as tic

fig = plt.figure()

x = np.arange(100)
y = 3.*np.sin(x*2.*np.pi/100.)

for i in range(5):
    temp = 510 + i
    ax = plt.subplot(temp)
    plt.plot(x,y)
    plt.subplots_adjust(hspace = .001)
    temp = tic.MaxNLocator(3)
    ax.yaxis.set_major_locator(temp)
    ax.set_xticklabels(())
    ax.title.set_visible(False)

plt.show()

Also you can use this

private static final String ALLOWED_URI_CHARS = "@#&=*+-_.,:!?()/~'%";
String urlEncoded = Uri.encode(path, ALLOWED_URI_CHARS);

it's the most simple method

Within your component, you can define an array of number (ES6) as described below:

export class SampleComponent {
  constructor() {
    this.numbers = Array(5).fill().map((x,i)=>i); // [0,1,2,3,4]
    this.numbers = Array(5).fill(4); // [4,4,4,4,4]
  }
}

See this link for the array creation: Tersest way to create an array of integers from 1..20 in JavaScript.

You can then iterate over this array with ngFor:

@Component({
  template: `
    <ul>
      <li *ngFor="let number of numbers">{{number}}</li>
    </ul>
  `
})
export class SampleComponent {
  (...)
}

Or shortly:

@Component({
  template: `
    <ul>
      <li *ngFor="let number of [0,1,2,3,4]">{{number}}</li>
    </ul>
  `
})
export class SampleComponent {
  (...)
}

You can change build versiyon.For example i tried QT 5.6.1 but it didn't work.Than i tried QT 5.7.0 .So it worked , Good Luck! :)

One function can do the job,

void free_list(node *pHead)
{
    node *pNode = pHead, *pNext;

    while (NULL != pNode)
    {
        pNext = pNode->next;
        free(pNode);
        pNode = pNext;
    }

}

Didn't work with ODBC-Bridge for me too. I got the way around to initialize ODBC connection using ODBC driver.

 import java.sql.*;  
 public class UserLogin
 {
     public static void main(String[] args)
     {
        try
        {    
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

            // C:\\databaseFileName.accdb" - location of your database 
           String url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=" + "C:\\emp.accdb";

            // specify url, username, pasword - make sure these are valid 
            Connection conn = DriverManager.getConnection(url, "username", "password");

            System.out.println("Connection Succesfull");
         } 
         catch (Exception e) 
         {
            System.err.println("Got an exception! ");
            System.err.println(e.getMessage());

          }
      }
  }

If your $VARIABLE is a string containing spaces or other special characters, and single square brackets are used (which is a shortcut for the test command), then the string may be split out into multiple words. Each of these is treated as a separate argument.

So that one variable is split out into many arguments:

VARIABLE=$(/some/command);  
# returns "hello world"

if [ $VARIABLE == 0 ]; then
  # fails as if you wrote:
  # if [ hello world == 0 ]
fi 

The same will be true for any function call that puts down a string containing spaces or other special characters.

Easy fix

Wrap the variable output in double quotes, forcing it to stay as one string (therefore one argument). For example,

VARIABLE=$(/some/command);
if [ "$VARIABLE" == 0 ]; then
  # some action
fi 

Simple as that. But skip to "Also beware..." below if you also can't guarantee your variable won't be an empty string, or a string that contains nothing but whitespace.

Or, an alternate fix is to use double square brackets (which is a shortcut for the new test command).

This exists only in bash (and apparently korn and zsh) however, and so may not be compatible with default shells called by /bin/sh etc.

This means on some systems, it might work from the console but not when called elsewhere, like from cron, depending on how everything is configured.

It would look like this:

VARIABLE=$(/some/command);
if [[ $VARIABLE == 0 ]]; then
  # some action
fi 

If your command contains double square brackets like this and you get errors in logs but it works from the console, try swapping out the [[ for an alternative suggested here, or, ensure that whatever runs your script uses a shell that supports [[ aka new test.

Also beware of the [: unary operator expected error

If you're seeing the "too many arguments" error, chances are you're getting a string from a function with unpredictable output. If it's also possible to get an empty string (or all whitespace string), this would be treated as zero arguments even with the above "quick fix", and would fail with [: unary operator expected

It's the same 'gotcha' if you're used to other languages - you don't expect the contents of a variable to be effectively printed into the code like this before it is evaluated.

Here's an example that prevents both the [: too many arguments and the [: unary operator expected errors: replacing the output with a default value if it is empty (in this example, 0), with double quotes wrapped around the whole thing:

VARIABLE=$(/some/command);
if [ "${VARIABLE:-0}" == 0 ]; then
  # some action
fi 

(here, the action will happen if $VARIABLE is 0, or empty. Naturally, you should change the 0 (the default value) to a different default value if different behaviour is wanted)

Final note: Since [ is a shortcut for test, all the above is also true for the error test: too many arguments (and also test: unary operator expected)

Might be a little late to the game here, but I just discovered this fantastic jQuery plugin https://github.com/mkdynamic/jquery-popupwindow. It basically uses an onUnload callback event, so it basically listens out for the closing of the child window, and will perform any necessary stuff at that point. SO there's really no need to write any JS in the child window to pass back to the parent.

@Entity is useful with model classes to denote that this is the entity or table

@Table is used to provide any specific name to your table if you want to provide any different name

Note: if you don't use @Table then hibernate consider that @Entity is your table name by default and @Entity must

@Entity    
@Table(name = "emp")     
public class Employee implements java.io.Serializable    
{

}

My approach was, but I can't guarantee that this is the fastest solution.

df = pd.DataFrame(columns=["firstname", "lastname"])
df = df.append({
     "firstname": "John",
     "lastname":  "Johny"
      }, ignore_index=True)

You can use :

window.history.pushState('obj', 'newtitle', newUrlWithQueryString)

its anything other than the data itself, ie tcp flags, headers, crc, fcs etc..

no that cannot work(not with real data):

String sql = "INSERT INTO course " +
        "VALUES (course_code, course_desc, course_chair)";
    stmt.executeUpdate(sql);

change it to:

String sql = "INSERT INTO course (course_code, course_desc, course_chair)" +
        "VALUES (?, ?, ?)";

Create a PreparedStatment with that sql and insert the values with index:

PreparedStatement preparedStatement = conn.prepareStatement(sql);
preparedStatement.setString(1, "Test");
preparedStatement.setString(2, "Test2");
preparedStatement.setString(3, "Test3");
preparedStatement.executeUpdate(); 

I usually do it using Seaborn which is built on top of matplotlib

import seaborn as sns
iris = sns.load_dataset('iris')
sns.scatterplot(x='sepal_length', y='sepal_width',
              hue='species', data=iris); 

Something like this should definitely work:

private List<Date> getListOfDaysBetweenTwoDates(Date startDate, Date endDate) {
    List<Date> result = new ArrayList<Date>();
    Calendar start = Calendar.getInstance();
    start.setTime(startDate);
    Calendar end = Calendar.getInstance();
    end.setTime(endDate);
    end.add(Calendar.DAY_OF_YEAR, 1); //Add 1 day to endDate to make sure endDate is included into the final list
    while (start.before(end)) {
        result.add(start.getTime());
        start.add(Calendar.DAY_OF_YEAR, 1);
    }
    return result;
}

An easy way to parse (and validate) URL's is the urlparse (py2, py3) module.

A regex is too much work.

There's no "validate" method because almost anything is a valid URL. There are some punctuation rules for splitting it up. Absent any punctuation, you still have a valid URL.

Check the RFC carefully and see if you can construct an "invalid" URL. The rules are very flexible.

For example ::::: is a valid URL. The path is ":::::". A pretty stupid filename, but a valid filename.

Also, ///// is a valid URL. The netloc ("hostname") is "". The path is "///". Again, stupid. Also valid. This URL normalizes to "///" which is the equivalent.

Something like "bad://///worse/////" is perfectly valid. Dumb but valid.

Bottom Line. Parse it, and look at the pieces to see if they're displeasing in some way.

Do you want the scheme to always be "http"? Do you want the netloc to always be "www.somename.somedomain"? Do you want the path to look unix-like? Or windows-like? Do you want to remove the query string? Or preserve it?

These are not RFC-specified validations. These are validations unique to your application.

attributes(someObject) 

Can also be useful

This error could be thrown in the following situation as well.

You want to checkout branch called feature from remote repository but the error is thrown because you already have branch called feature/<feature_name> in your local repository.

Simply checkout the feature branch under a different name:

git checkout -b <new_branch_name> <remote>/feature

You can use .querySelectorAll() to select all td elements, then loop over these with .forEach(). Their values can be retrieved with .innerHTML:

const cells = document.querySelectorAll('td');_x000D_
cells.forEach(function(cell) {_x000D_
  console.log(cell.innerHTML);_x000D_
})

<table name="mytab" id="mytab1">_x000D_
  <tr> _x000D_
    <td>col1 Val1</td>_x000D_
    <td>col2 Val2</td>_x000D_
  </tr>_x000D_
  <tr>_x000D_
    <td>col1 Val3</td>_x000D_
    <td>col2 Val4</td>_x000D_
  </tr>_x000D_
</table>

If you want to only select columns from a specific row, you can make use of the pseudo-class :nth-child() to select a specific tr, optionally in conjunction with the child combinator (>) (which can be useful if you have a table within a table):

const cells = document.querySelectorAll('tr:nth-child(2) > td');_x000D_
cells.forEach(function(cell) {_x000D_
  console.log(cell.innerHTML);_x000D_
})

<table name="mytab" id="mytab1">_x000D_
  <tr> _x000D_
    <td>col1 Val1</td>_x000D_
    <td>col2 Val2</td>_x000D_
  </tr>_x000D_
  <tr>_x000D_
    <td>col1 Val3</td>_x000D_
    <td>col2 Val4</td>_x000D_
  </tr>_x000D_
</table>

Combining various answers :

In MySQL 5.5, DEFAULT CURRENT_TIMESTAMP and ON UPDATE CURRENT_TIMESTAMP cannot be added on DATETIME but only on TIMESTAMP.

Rules:

1) at most one TIMESTAMP column per table could be automatically (or manually[My addition]) initialized or updated to the current date and time. (MySQL Docs).

So only one TIMESTAMP can have CURRENT_TIMESTAMP in DEFAULT or ON UPDATE clause

2) The first NOT NULL TIMESTAMP column without an explicit DEFAULT value like created_date timestamp default '0000-00-00 00:00:00' will be implicitly given a DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP and hence subsequent TIMESTAMP columns cannot be given CURRENT_TIMESTAMP on DEFAULT or ON UPDATE clause

CREATE TABLE `address` (
  `id` int(9) NOT NULL AUTO_INCREMENT,
  `village` int(11) DEFAULT NULL,
    `created_date` timestamp default '0000-00-00 00:00:00', 

    -- Since explicit DEFAULT value that is not CURRENT_TIMESTAMP is assigned for a NOT NULL column, 
    -- implicit DEFAULT CURRENT_TIMESTAMP is avoided.
    -- So it allows us to set ON UPDATE CURRENT_TIMESTAMP on 'updated_date' column.
    -- How does setting DEFAULT to '0000-00-00 00:00:00' instead of CURRENT_TIMESTAMP help? 
    -- It is just a temporary value.
    -- On INSERT of explicit NULL into the column inserts current timestamp.

-- `created_date` timestamp not null default '0000-00-00 00:00:00', // same as above

-- `created_date` timestamp null default '0000-00-00 00:00:00', 
-- inserting 'null' explicitly in INSERT statement inserts null (Ignoring the column inserts the default value)! 
-- Remember we need current timestamp on insert of 'null'. So this won't work. 

-- `created_date` timestamp null , // always inserts null. Equally useless as above. 

-- `created_date` timestamp default 0, // alternative to '0000-00-00 00:00:00'

-- `created_date` timestamp, 
-- first 'not null' timestamp column without 'default' value. 
-- So implicitly adds DEFAULT CURRENT_TIMESTAMP and ON UPDATE CURRENT_TIMESTAMP. 
-- Hence cannot add 'ON UPDATE CURRENT_TIMESTAMP' on 'updated_date' column.


   `updated_date` timestamp null on update current_timestamp,

  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=132 DEFAULT CHARSET=utf8;

INSERT INTO address (village,created_date) VALUES (100,null);

mysql> select * from address;
+-----+---------+---------------------+--------------+
| id  | village | created_date        | updated_date |
+-----+---------+---------------------+--------------+
| 132 |     100 | 2017-02-18 04:04:00 | NULL         |
+-----+---------+---------------------+--------------+
1 row in set (0.00 sec)

UPDATE address SET village=101 WHERE village=100;

mysql> select * from address;
+-----+---------+---------------------+---------------------+
| id  | village | created_date        | updated_date        |
+-----+---------+---------------------+---------------------+
| 132 |     101 | 2017-02-18 04:04:00 | 2017-02-18 04:06:14 |
+-----+---------+---------------------+---------------------+
1 row in set (0.00 sec)

Other option (But updated_date is the first column):

CREATE TABLE `address` (
  `id` int(9) NOT NULL AUTO_INCREMENT,
  `village` int(11) DEFAULT NULL,
  `updated_date` timestamp null on update current_timestamp,
  `created_date` timestamp not null , 
  -- implicit default is '0000-00-00 00:00:00' from 2nd timestamp onwards

  -- `created_date` timestamp not null default '0000-00-00 00:00:00'
  -- `created_date` timestamp
  -- `created_date` timestamp default '0000-00-00 00:00:00'
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=132 DEFAULT CHARSET=utf8;

I met this issue this morning because I used the same executable in DIFFERENT OSes: after compiling my program with gcc -ggdb -Wall test.c -o test in my Mac(10.15.2), I ran gdb with the executable in Ubuntu(16.04) in my VirtualBox.

Fix: recompile with the same command under Ubuntu, then you should be good.

Try pytest -s -v test_login.py for more info in console.

-v it's a short --verbose

-s means 'disable all capturing'

Sharing working and relevant code from our project:

//documentsArray is the list of sampleCollection objects
sampleCollection.insertMany(documentsArray)  
    .then((res) => {
        console.log("insert sampleCollection result ", res);
    })
    .catch(err => {
        console.log("bulk insert sampleCollection error ", err);
    });