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What does !! mean in ruby?
...f data from being returned. For example you probably don't want to return 3MB of image data in your has_image? method, or you may not want to return your entire user object in the logged_in? method. Using !! converts these objects to a simple true/false.
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How can I do an UPDATE statement with JOIN in SQL Server?
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edited Mar 10 at 3:56
Shelvacu
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answered Aug 18 '09 at...
rsync copy over only certain types of files using include option
...lude "*/" --exclude="*" --include="*.sh" "$from" "$to"
For rsync version 3.0.6 or higher, the order needs to be modified as follows (see comments):
rsync -zarv --include="*/" --include="*.sh" --exclude="*" "$from" "$to"
Adding the -m flag will avoid creating empty directory structures in the de...
Is there a performance impact when calling ToList()?
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edited May 23 '17 at 12:18
Community♦
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answered Mar 20 '13 at 7:20
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invalid context 0x0 under iOS 7.0 and system degradation
...se errors magically disappear some day (but that day did not come with 7.0.3).
Update: After installing Xcode 5.1 and targeting iOS 7.1, I can no longer reproduce the error by double tapping inside an empty text field.
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Use of “global” keyword in Python
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The keyword global is only useful to change or create global variables in a local context, alt...
How can I add a class to a DOM element in JavaScript?
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new_row.className = "aClassName";
Here's more information on MDN: className
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Unit Testing AngularJS directive with templateUrl
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answered Aug 21 '13 at 21:48
SleepyMurphSleepyMurph
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Make install, but not to default directories?
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answered Jul 13 '10 at 16:43
ThomasThomas
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jQuery scroll() detect when user stops scrolling
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