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Unique (non-repeating) random numbers in O(1)?
I'd like to generate unique random numbers between 0 and 1000 that never repeat (i.e. 6 doesn't show up twice), but that doesn't resort to something like an O(N) search of previous values to do it. Is this possible?
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How to elegantly check if a number is within a range?
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There are a lot of options:
int x = 30;
if (Enumerable.Range(1,100).Contains(x))
//true
if (x >= 1 && x <= 100)
//true
Also, check out this SO post for regex options.
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Easiest way to rename a model using Django/South?
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answered May 24 '10 at 18:07
LeopdLeopd
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Does Java casting introduce overhead? Why?
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answered Jan 31 '10 at 7:14
Alex NtousiasAlex Ntousias
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How to get MD5 sum of a string using python?
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answered Mar 14 '11 at 10:43
IkkeIkke
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How to redirect stderr and stdout to different files in the same line in script?
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edited Oct 26 '11 at 10:45
answered Oct 26 '11 at 10:38
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Browser support for URLs beginning with double slash
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answered Mar 9 '12 at 10:18
oezioezi
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What is the AppDelegate for and how do I know when to use it?
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edited Oct 27 '10 at 6:40
answered Mar 17 '09 at 7:40
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What is the maximum value for an int32?
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My mnemonic: 2^10 is very near to 1000, so 2^(3*10) is 1000^3 or about 1 billion. One of the 32 bits is used for sign, so the max value is really only 2^31, which is about twice the amount you get for 2^(3*10): 2 billion.
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What Content-Type value should I send for my XML sitemap?
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answered Jul 17 '10 at 17:40
GumboGumbo
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