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What reason is there to use null instead of undefined in JavaScript?
I've been writing JavaScript for quite a long time now, and I have never had a reason to use null . It seems that undefined is always preferable and serves the same purpose programmatically. What are some practical reasons to use null instead of undefined ?
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_=> what does this underscore mean in Lambda expressions?
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How many bytes in a JavaScript string?
I have a javascript string which is about 500K when being sent from the server in UTF-8. How can I tell its size in JavaScript?
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What are bitwise operators?
I'm someone who writes code just for fun and haven't really delved into it in either an academic or professional setting, so stuff like these bitwise operators really escapes me.
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What is the error “Every derived table must have its own alias” in MySQL?
I am running this query on MySQL
4 Answers
4
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Dot character '.' in MVC Web API 2 for request such as api/people/STAFF.45287
The URL I'm trying to let work is one in the style of: http://somedomain.com/api/people/staff.33311 (just like sites as LAST.FM allow all sort of signs in their RESTFul & WebPage urls, for example " http://www.last.fm/artist/psy'aviah " is a valid url for LAST.FM).
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What is VanillaJS?
...vaScript libraries.
Here's a funny site that jokingly talks about this: http://vanilla-js.com/
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edited Sep 12 '16 at 18:39
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How do I increase the number of displayed lines of a Java stack trace dump?
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How to sum all column values in multi-dimensional array?
How can I add all the columnar values by associative key? Note that key sets are dynamic.
20 Answers
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How to stop a JavaScript for loop?
...ES2015 release. Unlike forEach, we can use return, break and continue. See https://hacks.mozilla.org/2015/04/es6-in-depth-iterators-and-the-for-of-loop/
let arr = [1,2,3,4,5];
for (let ele of arr) {
if (ele > 3) break;
console.log(ele);
}
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