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How is set() implemented?
I've seen people say that set objects in python have O(1) membership-checking. How are they implemented internally to allow this? What sort of data structure does it use? What other implications does that implementation have?
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How do I obtain the frequencies of each value in an FFT?
... terms, the nth bin is n * Fs / N.
So if your sample rate, Fs is say 44.1 kHz and your FFT size, N is 1024, then the FFT output bins are at:
0: 0 * 44100 / 1024 = 0.0 Hz
1: 1 * 44100 / 1024 = 43.1 Hz
2: 2 * 44100 / 1024 = 86.1 Hz
3: 3 * 44100 / 1024 = 129.2 Hz
4: ...
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Using std Namespace
...appy reading std::string, std::vector, etc. In fact, seeing a raw vector makes me wonder if this is the std::vector or a different user-defined vector.
I am always against using using namespace std;. It imports all sorts of names into the global namespace and can cause all sorts of non-obvious ambi...
Create array of all integers between two numbers, inclusive, in Javascript/jQuery [duplicate]
Say I have the following checkbox:
15 Answers
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Algorithms based on number base systems? [closed]
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Chris Okasaki has a very good chapter in his book Purely Functional Data Structures that discusses "Numerical Representations": essentially, take some representation of a number and convert it into a data structure. To give a flavor...
What's the difference between using “let” and “var”?
...le, but I'm still not quite sure how it behaves differently than the var keyword.
36 Answers
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How do I check that multiple keys are in a dict in a single pass?
I want to do something like:
19 Answers
19
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Can regular expressions be used to match nested patterns? [duplicate]
... write a regular expression that matches a nested pattern that occurs an unknown number of times? For example, can a regular expression match an opening and closing brace when there are an unknown number of open/close braces nested within the outer braces?
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How to create a simple map using JavaScript/JQuery [duplicate]
...ence/Global_Objects/Map
var map = new Object(); // or var map = {};
map[myKey1] = myObj1;
map[myKey2] = myObj2;
function get(k) {
return map[k];
}
//map[myKey1] == get(myKey1);
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Best way to randomize an array with .NET
... array of strings with .NET? My array contains about 500 strings and I'd like to create a new Array with the same strings but in a random order.
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