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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...
How to round up the result of integer division?
...m in mid-2017 stumbling across this great answer after trying several much more complex approaches.
– Mifo
Jul 29 '17 at 23:41
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Check if a value is an object in JavaScript
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What is this 'Lambda' everyone keeps speaking of?
...ut there are other higher order functions, like forEach, that perform much more useful tasks. For example filter:
var numbers = [1, 2, 3, 4];
var even = [];
// keep all even numbers from above array
for (var i=0; i<numbers.length; i++) {
if (numbers[i] % 2 === 0) {
even.push(numb...
How should I use git diff for long lines?
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“Treat all warnings as errors except…” in Visual Studio
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Passing arguments to “make run”
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@Rob: $() is more portable, it works in Nmake as well as make.
– John Knoeller
Feb 6 '10 at 20:33
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What is a magic number, and why is it bad? [closed]
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@MarcusJ You could not be more wrong. This is not a matter of opinion, but of hard earned experience, by many programmers. I cannot tell you how many times, over the past 40 years of programming, that I have cursed a previous programmer who didn't def...
How to force NSLocalizedString to use a specific language
...t to call this sometime early in your application's startup. You can read more about language/locale preferences here: Internationalization Programming Topics: Getting the Current Language and Locale
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Set cellpadding and cellspacing in CSS?
...cellpadding, which I'd thought was obvious (just use "padding"). Hope it's more useful now.
– Eric Nguyen
Dec 16 '13 at 6:27
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