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Algorithm to generate all possible permutations of a list?
Say I have a list of n elements, I know there are n! possible ways to order these elements. What is an algorithm to generate all possible orderings of this list? Example, I have list [a, b, c]. The algorithm would return [[a, b, c], [a, c, b,], [b, a, c], [b, c, a], [c, a, b], [c, b, a]].
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Replace multiple characters in a C# string
Is there a better way to replace strings?
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How to put multiple statements in one line?
I wasn't sure under what title to ponder this question exactly, coding golf seems appropriate if a bit unspecific.
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What is the easiest way to remove the first character from a string?
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15 Answers
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What is the difference between bottom-up and top-down?
The bottom-up approach (to dynamic programming) consists in first looking at the "smaller" subproblems, and then solve the larger subproblems using the solution to the smaller problems.
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Have bash script answer interactive prompts [duplicate]
Is it possible to have a bash script automatically handle prompts that would normally be presented to the user with default actions? Currently I am using a bash script to call an in-house tool that will display prompts to the user (prompting for Y/N) to complete actions, however the script I'm writ...
How can I get a file's size in C? [duplicate]
How can I find out the size of a file I opened with an application written in C ?
I would like to know the size, because I want to put the content of the loaded file into a string, which I allocate using malloc() . Just writing malloc(10000*sizeof(char)); is IMHO a bad idea.
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How to change to an older version of Node.js
I am running Node.js version v0.5.9-pre on Ubuntu 10.10.
15 Answers
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Randomize a List
What is the best way to randomize the order of a generic list in C#? I've got a finite set of 75 numbers in a list I would like to assign a random order to, in order to draw them for a lottery type application.
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Limit a stream by a predicate
Is there a Java 8 stream operation that limits a (potentially infinite) Stream until the first element fails to match a predicate?
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