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What does the exclamation mark mean in a Haskell declaration?

...y to look inside it, probably through a pattern match: case f of Foo 0 _ _ _ -> "first arg is zero" _ -> "first arge is something else" This is going to execute enough code to do what it needs, and no more. So it will create a Foo with four parameters (because you can't ...
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How to implement a unique index on two columns in rails

... Dorian 17.4k66 gold badges101101 silver badges102102 bronze badges answered Nov 8 '10 at 12:45 shingarashingara ...
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How can I change the copyright template in Xcode 4?

... 209 Xcode 4 (and above) stores this on a per-project basis. If you select the project in the Proj...
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What is the difference between origin and upstream on GitHub?

... answered Feb 13 '12 at 9:10 VonCVonC 985k405405 gold badges33953395 silver badges39913991 bronze badges ...
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How to get Visual Studio to open Resolve Conflicts window after a TFS Get

... | edited Jun 22 '14 at 9:00 answered Jun 22 '14 at 8:54 Da...
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How to allow remote connection to mysql

... 5.5\ and the filename will be my.ini. Change line bind-address = 127.0.0.1 to #bind-address = 127.0.0.1 And restart the MySQL server (Unix/OSX, and Windows) for the changes to take effect. share | ...
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PHP Difference between array() and []

...ith []." – mrwaim Feb 12 '15 at 12:30 1 @Prof83, You may use $data = new stdClass();$data->som...
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How do I change column default value in PostgreSQL?

... answered Jan 20 '11 at 9:28 Silver LightSilver Light 35.5k2929 gold badges112112 silver badges156156 bronze badges ...
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Callback after all asynchronous forEach callbacks are completed

...r function callback () { console.log('all done'); } var itemsProcessed = 0; [1, 2, 3].forEach((item, index, array) => { asyncFunction(item, () => { itemsProcessed++; if(itemsProcessed === array.length) { callback(); } }); }); (thanks to @vanuan and others) This appro...
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emacs zoom in/zoom out

...) on the mouse. – sawa Apr 4 '11 at 0:05 2 ...