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Formatting a number with exactly two decimals in JavaScript
...adays, you can use the Intl.NumberFormat constructor. It's part of the ECMAScript Internationalization API Specification (ECMA402). It has pretty good browser support, including even IE11, and it is fully supported in Node.js.
const formatter = new Intl.NumberFormat('en-US', {
minimumFraction...
Real mouse position in canvas [duplicate]
...er to simplify cross-browser compatibility, but if you want to use raw javascript a quick Google will get that too).
var canvasOffset=$("#canvas").offset();
var offsetX=canvasOffset.left;
var offsetY=canvasOffset.top;
Then in your mouse handler, you can get the mouse X/Y like this:
...
is not JSON serializable
...used/viewed straightly in the browser)
import json
from xxx.models import alert
from django.core import serializers
def test(request):
alert_list = alert.objects.all()
tmpJson = serializers.serialize("json",alert_list)
tmpObj = json.loads(tmpJson)
return HttpResponse(json.dumps(t...
When should I use Arrow functions in ECMAScript 6?
...,
showMovies: function() {
this.movies.forEach(function(movie) {
alert(this.name + " has acted in " + movie);
});
}
};
Actor.showMovies();
Now what about if the this keyword were inside of method’s function?
Here this would refer to window object than the inner function as its ...
What's the best strategy for unit-testing database-driven applications?
...at I think would solve some of your problems:
Keep the entire schema and scripts for creating it in source control so that anyone can create the current database schema after a check out. In addition, keep sample data in data files that get loaded by part of the build process. As you discover dat...
html tables: thead vs th
...ike <tbody> and <tfoot> is. So you have more possibilities for scripting and formatting.
share
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Javascript switch vs. if…else if…else
...nd the different ways different JS engines function. Quote: Since most JavaScript engines don’t have such optimizations, performance of the switch statement is mixed.
– Jasper
May 17 '13 at 17:23
...
关于php的socket初探 - PHP - 清泛IT论坛，有思想、有深度
...狭小的容器内，最近转向php，才慢慢体会到之前充实技术开发前的那段极度渴望去学习新知识的那种动力，可能在大多数的人眼里，php是专为web而生，做wep app是一流的快速好用，并极易简单和容易上手，做起web所需的各项功能...
How/When does Execute Shell mark a build as failure in Jenkins?
...part of the answer, but absolutely has to be said:
If you have a shell script that does "checkout, build, deploy" all by itself, then why are you using Jenkins? You are foregoing all the features of Jenkins that make it what it is. You might as well have a cron or an SVN post-commit hook call th...
Javascript when to use prototypes
...var myObject = function () {
};
myObject.prototype.getA = function (){
alert("A");
};
myObject.getB = function (){
alert("B");
};
myObject.getB(); // This works fine
myObject.getA(); // Error!
var myPrototypeCopy = new myObject();
myPrototypeCopy.getA(); // This works, too.
...