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What is event bubbling and capturing?
...opagation mode determines in which order the elements receive the event.
With bubbling, the event is first captured and handled by the innermost element and then propagated to outer elements.
With capturing, the event is first captured by the outermost element and propagated to the inner elements....
Keyboard shortcut to comment lines in Sublime Text 3
In Sublime Text 2 it was possible to comment out a line or a block of lines with Ctrl + / and Ctrl + Shift + / . According to the menu Edit > Comment these shortcuts should be valid, but in Sublime Text 3 (build 3047) they no longer seem to work. Does anybody know the right default keyboard...
what are the .map files used for in Bootstrap 3.x?
There are two files included in the CSS folder with .map file extensions. They are:
8 Answers
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Simplest way to wait some asynchronous tasks complete, in Javascript?
...le and use async.parallel(...). You will find this module really helpful - it was developed to solve the problem you are struggling with. Your code may look like this
var async = require('async');
var calls = [];
['aaa','bbb','ccc'].forEach(function(name){
calls.push(function(callback) {
...
Python: How to ignore an exception and proceed? [duplicate]
...in my code and When an exception is throw. I really just want to continue with the code because in that case, everything is still able to run just fine. The problem is if you leave the except: block empty or with a #do nothing, it gives you a syntax error. I can't use continue because its not in a l...
AngularJS-Twig conflict with double curly braces
...erpolateProvider service. One convenient place for this is at the module initialization time.
angular.module('myApp', []).config(function($interpolateProvider){
$interpolateProvider.startSymbol('{[{').endSymbol('}]}');
});
https://docs.angularjs.org/api/ng/provider/$interpolateProvider
...
pod install -bash: pod: command not found
I installed pod some time ago. However, it's stopped working so I'm working through this again.
21 Answers
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Spring Boot + JPA : Column name annotation ignored
I have a Spring Boot application with dependency spring-boot-starter-data-jpa . My entity class has a column annotation with a column name. For example:
...
Does Java casting introduce overhead? Why?
...
There are 2 types of casting:
Implicit casting, when you cast from a type to a wider type, which is done automatically and there is no overhead:
String s = "Cast";
Object o = s; // implicit casting
Explicit casting, when you go from a wider type to a more na...
Create Django model or update if exists
...docs.djangoproject.com/en/dev/ref/models/querysets/#get-or-create
For you it could be :
id = 'some identifier'
person, created = Person.objects.get_or_create(identifier=id)
if created:
# means you have created a new person
else:
# person just refers to the existing one
...