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How to use a variable for the key part of a map
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@TriMix the difference is Strings vs GStrings. With [(A):1, (X):2], the variable is being escaped into a String. With ["$A":1, (X):2], the "$A" is an interpolated string which results in a GString. Maps expect the keys to be immutable which a GString doesn't ...
Hidden Features of C#? [closed]
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community wiki
12 revs, 7 users 80%chakrit
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Why catch and rethrow an exception in C#?
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Is that true for Java as well ... "throw" vs. "throw ex"?
– JasonStoltz
Mar 11 '11 at 15:23
9
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What is the best IDE to develop Android apps in? [closed]
...com/2011/01/its-like-coming-home-again.html
and: http://code.google.com/p/vs-android/
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Is it possible to use argsort in descending order?
...e relevant information is that calculating the negation is O(n) complexity vs taking another slice which is O(1).
– wim
Aug 6 '17 at 19:33
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What's the difference between `on` and `live` or `bind`?
... one. This has the added bonus of tidying up the inefficiencies with live vs delegate. In future versions of jQuery, these methods will be removed and only on and one will be left.
Examples:
// Using live()
$(".mySelector").live("click", fn);
// Equivalent `on` (there isn't an exact equivalent,...
How many characters can UTF-8 encode?
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Unicode vs UTF-8
Unicode resolves code points to characters. UTF-8 is a storage mechanism for Unicode. Unicode has a spec. UTF-8 has a spec. They both have different limits. UTF-8 has a different upwards-bound.
Unicode
Unicode is ...
Remove blank attributes from an Object in Javascript
...undefined) {
delete obj[propName];
}
}
}
A few notes on null vs undefined:
test.test1 === null; // true
test.test1 == null; // true
test.notaprop === null; // false
test.notaprop == null; // true
test.notaprop === undefined; // true
test.notaprop == undefined; // true
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Default behavior of “git push” without a branch specified
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community wiki
15 revs, 11 users 34%UncleZeiv
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mysqli or PDO - what are the pros and cons? [closed]
...e a decent speed comparison of the two at jonathanrobson.me/2010/06/mysqli-vs-pdo-benchmarks. Summary: inserts - almost equal, selects - mysqli is ~2.5% faster for non-prepared statements/~6.7% faster for prepared statements. Given how small the performance penalties are, the features and flexibilit...