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What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?

...rovides high performance, regular, multi-dimensional, shape polymorphic parallel arrays. All numeric data is stored unboxed. Functions written with the Repa combinators are automatically parallel provided you supply +RTS -Nwhatever on the command line when running the program. Recently, it has bee...
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What function is to replace a substring from a string in C?

Given a ( char * ) string, I want to find all occurrences of a substring and replace them with an alternate string. I do not see any simple function that achieves this in <string.h> . ...
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Can I write a CSS selector selecting elements NOT having a certain class or attribute?

I would like to write a CSS selector rule that selects all elements that don't have a certain class. For example, given the following HTML: ...
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How to go to each directory and execute a command?

...oesn't match anything else than numbers, but in the general case, you basically always want to put the directory name in double quotes inside the loop. cd "$d" would be better in that it transfers to situations where the wildcard does match files whose names contain whitespace and/or shell metachar...
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How to elegantly rename all keys in a hash in Ruby? [duplicate]

...to do ages = Hash[ages.map {|k, v| [mappings[k] || k, v] }] to be able to call the variable again with the mapping. – Chanpory Nov 9 '10 at 20:32 ...
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Favorite Visual Studio keyboard shortcuts [closed]

...fancy tool panel. Instead, it's just about letting me see the code. With all the panels surrounding you, the area you use to actually write code becomes too small. In this cases, Shift+Alt+Enter comes in to the rescue and gets the code window in focus in full screen mode. Hit it again, and you h...
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execute function after complete page load

... why jQuery will most probably implement some heavy workarounds to support all the browsers. And this will make it very difficult to "exactly" simulate the behavior using plain Javascript (but not impossible of course). as Jeffrey Sweeney and J Torres suggested, i think its better to have a setTime...
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What does ||= (or-equals) mean in Ruby?

...threads on the Ruby mailing-list whose only purpose is to collect links to all the other threads on the Ruby mailing-list that discuss this issue. Here's one: The definitive list of ||= (OR Equal) threads and pages If you really want to know what is going on, take a look at Section 11.4.2.3 "Abbrevi...
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String Concatenation using '+' operator

... code: string x = "hello"; string y = "there"; string z = "chaps"; string all = x + y + z; actually gets compiled as: string x = "hello"; string y = "there"; string z = "chaps"; string all = string.Concat(x, y, z); (Gah - intervening edit removed other bits accidentally.) The benefit of the C...
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Visual Studio refuses to forget breakpoints?

... go to Debug menu then Delete All Breakpoints Ctrl+Shift+F9 share | improve this answer | follow | ...