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assign multiple variables to the same value in Javascript
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Nothing stops you from doing
moveUp = moveDown = moveLeft = moveRight = mouseDown = touchDown = false;
Check this example
var a, b, c;
a = b = c = 10;
console.log(a + b + c)
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How can I determine if a variable is 'undefined' or 'null'?
How do I determine if variable is undefined or null ?
30 Answers
30
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NodeJS: How to get the server's port?
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Express 4.x answer:
Express 4.x (per Tien Do's answer below), now treats app.listen() as an asynchronous operation, so listener.address() will only return data inside of app.listen()'s callback:
var app = require('express')();
var listener = app.listen(8888, functi...
CASCADE DELETE just once
I have a Postgresql database on which I want to do a few cascading deletes. However, the tables aren't set up with the ON DELETE CASCADE rule. Is there any way I can perform a delete and tell Postgresql to cascade it just this once? Something equivalent to
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How can I represent an 'Enum' in Python?
...een py2 and py3, e.g. you'll need __order__ in python 2).
To use enum34, do $ pip install enum34
To use aenum, do $ pip install aenum
Installing enum (no numbers) will install a completely different and incompatible version.
from enum import Enum # for enum34, or the stdlib version
# from...
How do I cast a variable in Scala?
Given a variable with type Graphics ,
how do I cast it to Graphics2D in Scala?
2 Answers
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When to dispose CancellationTokenSource?
...nmanaged resource.
Since CancellationTokenSource has no finalizer, if we do not dispose it, the GC won't do it.
7 Answers...
How to dynamically insert a tag via jQuery after page load?
...ipt tags as strings and then using jquery replaceWith() to add them to the document after page load:
9 Answers
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Tool for adding license headers to source files? [closed]
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#!/bin/bash
for i in *.cc # or whatever other pattern...
do
if ! grep -q Copyright $i
then
cat copyright.txt $i >$i.new && mv $i.new $i
fi
done
share
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improv...
how do I strip white space when grabbing text with jQuery?
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One thing to be wary of is that IE doesn't consider non-breaking spaces ( ,  ,  , \xA0, \u00A0, etc...) as white-space, so /[\s\xA0]+/g might be more reliable for replacing all white-space.
– travis
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