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How to find all combinations of coins when given some dollar value

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Regular expression for matching HH:MM time format

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Socket.IO - how do I get a list of connected sockets/clients?

... 176 In Socket.IO 0.7 you have a clients method on the namespaces, this returns a array of all conn...
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How to determine if a number is odd in JavaScript

... the below code: function isOdd(num) { return num % 2;} console.log("1 is " + isOdd(1)); console.log("2 is " + isOdd(2)); console.log("3 is " + isOdd(3)); console.log("4 is " + isOdd(4)); 1 represents an odd number, while 0 represents an even number. ...
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How to calculate time elapsed in bash script?

... | edited Dec 12 '15 at 1:12 answered Jan 17 '12 at 23:44 ...
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How to generate a random integer number from within a range

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What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort

...ic sort compares the numbers as floats, this allows scientific notation eg 1.234E10 but is slower and subject to rounding error (1.2345678 could come after 1.2345679), numeric sort is just a regular alphabetic sort that knows 10 comes after 9. See http://www.gnu.org/software/coreutils/manual/h...
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How do I pick randomly from an array?

... 1140 Just use Array#sample: [:foo, :bar].sample # => :foo, or :bar :-) It is available in Ru...
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Modular multiplicative inverse function in Python

...e inverse of a number, i.e. a number y = invmod(x, p) such that x*y == 1 (mod p) ? Google doesn't seem to give any good hints on this. ...
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Numpy argsort - what is it doing?

... 146 According to the documentation Returns the indices that would sort an array. 2 is the i...