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Big O of JavaScript arrays
Arrays in JavaScript are very easy to modify by adding and removing items. It somewhat masks the fact that most languages arrays are fixed-size, and require complex operations to resize. It seems that JavaScript makes it easy to write poorly performing array code. This leads to the question:
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What are the best practices for JavaScript error handling?
I'm looking to start making my JavaScript a bit more error proof, and I'm finding plenty of documentation on using try , catch , finally , and throw , but I'm not finding a ton of advice from experts on when and where to throw errors.
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Iterate over a Javascript associative array in sorted order
Let's say I have a Javascript associative array (a.k.a. hash, a.k.a. dictionary):
10 Answers
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Javascript add leading zeroes to date
..., without getting hung up on a discussion about the ins and outs of timing JavaScript routines, I found that the slice() technique in the accepted answer is about a 1/10 of a second faster than @Aleross 's pad() technique on 1 million iterations. jsFiddle. "pay your money, take your pick".
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How to have favicon / icon set when bookmarklet dragged to toolbar?
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A bookmarklet uses the javascript:// schema and thus do not have a domain from which a favicon may be loaded.
So, currently there is no way for you to provide a favicon for a bookmarklet. Think about it like this: remember the whole Javascript sa...
JavaScript file upload size validation
Is there any way to check file size before uploading it using JavaScript?
13 Answers
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Getting the return value of Javascript code in Selenium
...sts of my website, and I'd like to be able to get the return value of some Javascript code. If I have a foobar() Javascript function in my webpage and I want to call that and get the return value into my Python code, what can I call to do that?
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Uncaught ReferenceError: $ is not defined?
...uld put the references to the jquery scripts first.
<script language="JavaScript" type="text/javascript" src="/js/jquery-1.2.6.min.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/jquery-ui-personalized-1.5.2.packed.js"></script>
<script langua...
Override body style for content in an iframe
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@SimpleSam5 Can you provide the Javascript alternative (without using Jquery) ?
– Kamalakannan J
Sep 9 '16 at 4:33
2
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What is the JavaScript convention for no operation?
What is the JavaScript convention for no operation? Like a Python pass command.
6 Answers
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