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Difference between variable declaration syntaxes in Javascript (including global variables)?
...sually big ones.
There's a fourth way, and as of ES2015 (ES6) there's two more. I've added the fourth way at the end, but inserted the ES2015 ways after #1 (you'll see why), so we have:
var a = 0; // 1
let a = 0; // 1.1 (new with ES2015)
const a = 0; // 1.2 (new with ES2015)
a = 0; ...
Are nested HTML comments possible?
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@selector() in Swift?
...ath(#keyPath(Person.friends.firstName)). See SE-0062 for details. And even more KeyPath stuff in Swift 4, so make sure you're using the right KeyPath-based API instead of selectors if appropriate.
You can read more about selectors under Interacting with Objective-C APIs in Using Swift with Cocoa and...
How to call a SOAP web service on Android [closed]
... SOAP processing is also memory and processor intensive compared to a more concise format like JSON.
– Jeremy Edwards
Mar 2 '10 at 6:15
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How to paginate with Mongoose in Node.js?
...et (e.g. pageNumber above) increases, cursor.skip() will become slower and more CPU intensive. With larger collections, cursor.skip() may become IO bound.
To achieve pagination in a scaleable way combine a limit( ) along with at least one filter criterion, a createdOn date suits many purposes.
M...
How to create the most compact mapping n → isprime(n) up to a limit N?
...ent a pseudo-prime test based on Fermat's little theorem. If I really want more speed (i.e. avoid O(sqrt(N)) algorithm altogether), I precompute the false positives (see Carmichael numbers) and do a binary search. This is by far the fastest test I've ever implemented, the only drawback is that the r...
cscope or ctags why choose one over the other? [closed]
...without doing much else, it's vital for omni-complete too. cscope provides more features if you have to maintain a large and mostly unknown code base, but requires more leg work.
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Alternate output format for psql
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I just needed to spend more time staring at the documentation. This command:
\x on
will do exactly what I wanted. Here is some sample output:
select * from dda where u_id=24 and dda_is_deleted='f';
-[ RECORD 1 ]------+------------------------...
Why would a static nested interface be used in Java?
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@Pacerier: no. More precisely, you can load the class and inspect its members, but cannot instantiate it or call methods on it without using setAccessible(true). In other words it is visible, but not accessible, via reflection. But if the n...