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Answer : I had the same problem but managed to fix it following dvl's comment on this page. Here is a summary of the fix: In settings.py if DEBUG: MIDDLEWARE += ( 'debug_toolbar.middleware.DebugToolbarMiddleware', ) INSTALLED_APPS += ( 'debug_toolbar', ) INTERNAL_IPS = ('127.0.0.1', ) DEBUG_TOOLBAR_CONFIG = { 'INTERCEPT_REDIRECTS': False, } In the project urls.py, add this url pattern to the end: from django.conf import settings if settings.DEBUG: import debug_toolbar urlpatterns += [ url(r'^__debug__/', include(debug_toolbar.urls)), ] Some information for news users as me, when dev on virtual or remote machine Add this ligne in a views.py file print("IP Address for debug-toolbar: " + request.META['REMOTE_ADDR']) When the views is call, you can see the client IP in the shell You have to add this IP the settings.py file INTERNAL_IPS

Answer : Locks are used for mutual exclusion. When you want to ensure that a piece of code is atomic, put a lock around it. You could theoretically use a binary semaphore to do this, but that's a special case. Semaphores and condition variables build on top of the mutual exclusion provide by locks and are used for providing synchronized access to shared resources. They can be used for similar purposes. A condition variable is generally used to avoid busy waiting (looping repeatedly while checking a condition) while waiting for a resource to become available. For instance, if you have a thread (or multiple threads) that can't continue onward until a queue is empty, the busy waiting approach would be to just doing something like: //pseudocode while(!queue.empty()) { sleep(1); } The problem with this is that you're wasting processor time by having this thread repeatedly check the condition. Why not instead have a synchronization variable that can be signaled to tel

Example: inch to cm 1 inch = 2.54 cm

Example: what is -> in c arrow operator ( -> ) in C is used to access a member of a struct which is referenced by the pointer in question

Example 1: php string to int intval ( $string ) ; Example 2: php to int $num = "3.14" ; $int = ( int ) $num ; Example 3: Convert a String to a Number in PHP phpCopy <?php $variable = "abc" ; $integer = ( int ) $variable ; echo "The variable has converted to a number and its value is $integer ." ; ?> Example 4: convert string to int php 7 $id = '5' $int = ( int ) $id ;

Example 1: jquery click function $ ( " #target " ) .click ( function ( ) { alert ( "Handler for .click() called." ) ; } ) ; Example 2: jquery click event $ ( ' #selector ' ) .on ( 'click' , function ( ) { //Your code here } ) ; Example 3: jquery onclick function $ ( " #other " ) .click ( function ( ) { $ ( "#target" ) . click ( ) ; } ) ;

Example 1: laravel create controller php artisan make : controller MyController Example 2: laravel create controller command php artisan make : controller UserController Example 3: laravel route controller use App\Http\Controllers\UserController ; Route :: get ( 'user/{id}' , [ UserController :: class , 'show' ] ) ; Example 4: how to create controller in laravel php artisan make : controller PhotoController -- resource Example 5: how to make controller in laravel php artisan make : controller ShowProfile Example 6: laravel controller middleware class UserController extends Controller { /** * Instantiate a new controller instance. * * @return void */ public function __construct ( ) { $this -> middleware ( 'auth' ) ; $this -> middleware ( 'log' ) -> only ( 'index' ) ; $this -> middleware ( 'subscribed' ) -> except ( 'store' ) ; } }

Answer : repo.spring.io lazily caches the contents of Maven Central. You don't say which dependency it is that's causing a problem, but I believe the problem that you're seeing is that you're attempting to access an artifact that has yet to be cached. This will result in a 401 response. Trying adding mavenCentral() to the configured repositories in build.gradle . For example: repositories { mavenCentral() maven { url "https://repo.spring.io/milestone" } } repo.spring.io is no longer serving through plain http. Check your gradle (pom.xml, etc) file for http://repo.spring.io and change it to https://repo.spring.io The relevant maven error message is similar to this: [ERROR] Failed to execute goal org.apache.maven.plugins:maven-site-plugin:3.8.2:site (default-site) on project tidy-up: SiteToolException: The site descriptor cannot be resolved from the repository: ArtifactResolutionException: Unable to locate site descriptor: Could not transfer a

Answer : TL;DR use document.body.classList.add and document.body.classList.remove I would have two functions that toggle a piece of state to show/hide the modal within your outer component. Inside these functions I would use the document.body.classList.add and document.body.classList.remove methods to manipulate the body class dependant on the modal's state like below: openModal = (event) => { document.body.classList.add('modal-open'); this.setState({ showModal: true }); } hideModal = (event) => { document.body.classList.remove('modal-open'); this.setState({ showModal: false }); } With the new React (16.8) this can be solved with hooks: import {useEffect} from 'react'; const addBodyClass = className => document.body.classList.add(className); const removeBodyClass = className => document.body.classList.remove(className); export default function useBodyClass(className) { useEffect( () => { // Se

Example 1: javascript open new window <a onclick= "window.open(document.URL, '_blank', 'location=yes,height=570,width=520,scrollbars=yes,status=yes');" > Open New Window </a> Example 2: open new window javascript window. open ( "LINK-HERE" ) ; Example 3: open new window in java script <script type= "text/javascript" > var windowObjectReference = null ; // global variable function openRequestedPopup ( url , windowName ) { if ( windowObjectReference == null || windowObjectReference .closed ) { windowObjectReference = window. open ( url , windowName , "resizable,scrollbars,status" ) ; } else { windowObjectReference. focus ( ) ; } ; } </script> ( ... ) <p><a href= "http://www.spreadfirefox.com/" target= "PromoteFirefoxWindow" onclick= "openRequestedPopup(this.href, this.target); return false;" title= "This link will create a new

Answer : There's an experimental CSS property called text-stroke, supported on some browsers behind a -webkit prefix. h1 { -webkit-text-stroke: 2px black; /* width and color */ font-family: sans; color: yellow; } <h1>Hello World</h1> Another possible trick would be to use four shadows, one pixel each on all directions, using property text-shadow : h1 { /* 1 pixel black shadow to left, top, right and bottom */ text-shadow: -1px 0 black, 0 1px black, 1px 0 black, 0 -1px black; font-family: sans; color: yellow; } <h1>Hello World</h1> But it would get blurred for more than 1 pixel thickness. UPDATE Here's a SCSS mixin to generate the stroke: http://codepen.io/pixelass/pen/gbGZYL /// Stroke font-character /// @param {Integer} $stroke - Stroke width /// @param {Color} $color - Stroke color /// @return {List} - text-shadow list @function stroke($stroke, $color) { $shadow: (); $from: $stroke*-1; @for $i from $from thr

Example: C# TutorialsTeacher public int MyAutoImplementedProperty { get ; set ; }

Example 1: css select all siblings after element /*To match to any sibling element after the selector on the left, use the tilde symbol '~'. This is called the general sibling combinator. */ h1 ~ p { color : black ; } Example 2: adjacent sibling selector /*The adjacent sibling combinator (+) separates two selectors and matches the second element only if it immediately follows the first element, and both are children of the same parent element.*/ li : first - of - type + li { color : red ; } < ul > < li > One < / li > // The sibling < li > Two < / li > // This adjacent sibling will be red < li > Three < / li > < / ul > Example 3: sibling selector css /*General Sibling*/ /*The general sibling selector selects all elements that are siblings of a specified element. The following example selects all <p> elements that are siblings of <div> elements: */ /*<div></div> &

Example 1: td align top <td style= "vertical-align:top" > <p>Content</p> </td> Example 2: table td data in middle vertical-align : middle