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Why is using “for…in” for array iteration a bad idea?
...5;
for (var x in a) {
// Shows only the explicitly set index of "5", and ignores 0-4
console.log(x);
}
/* Will display:
5
*/
Also consider that JavaScript libraries might do things like this, which will affect any array you create:
// Somewhere deep in your JavaScript...
Is there a cross-domain iframe height auto-resizer that works?
...ibrary for keeping iFrames sized to their content. It uses the PostMessage and MutationObserver APIs, with fall backs for IE8-10. It also has options for the content page to request the containing iFrame is a certain size and can also close the iFrame when your done with it.
https://github.com/david...
Different ways of clearing lists
...
Why the first one will only affect a? I thought a and b reference to the same object... Just wanna know why. Thanks.
– Alston
Nov 22 '14 at 9:48
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Detect element content changes with jQuery
change() function works and detects changes on form elements, but is there a way of detecting when a DOM element's content was changed?
...
How do I initialize the base (super) class?
...
Python (until version 3) supports "old-style" and new-style classes. New-style classes are derived from object and are what you are using, and invoke their base class through super(), e.g.
class X(object):
def __init__(self, x):
pass
def doit(self, bar):
pa...
How to generate random SHA1 hash to use as ID in node.js?
...o create a HMAC-SHA1 hash?
I'd create a hash of the current timestamp + a random number to ensure hash uniqueness:
var current_date = (new Date()).valueOf().toString();
var random = Math.random().toString();
crypto.createHash('sha1').update(current_date + random).digest('hex');
...
p vs puts in Ruby
Is there any difference between p and puts in Ruby?
7 Answers
7
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What is the use of making constructor private in a class?
... answered Jan 14 '10 at 6:33
nandananda
23.5k1212 gold badges6565 silver badges8989 bronze badges
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Can you write virtual functions / methods in Java?
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@QuaziIrfan That is difference between Java and C# though.
– Sreekanth Karumanaghat
Dec 24 '19 at 6:09
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Undo git stash pop that results in merge conflict
...ing I was on an old topic branch. To transfer them, I wanted to stash them and then apply them to a new branch off of master. I used git stash pop to transfer work-in-progress changes to this new branch, forgetting that I hadn't pulled new changes into master before creating the new branch. This r...