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Best way to detect Mac OS X or Windows computers with JavaScript or jQuery

...ing the user agent, but it can be too easily spoofed for reliable OS detection. Is there a surefire way to detect whether the OS on which the browser is running is Mac OS X or Windows? If not, what's better than user agent sniffing? ...
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iOS difference between isKindOfClass and isMemberOfClass

... isKindOfClass:(Class)aClass and the isMemberOfClass:(Class)aClass functions? I know it is something small like, one is global while the other is an exact class match but I need someone to specify which is which please. ...
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How to access command line parameters?

...mmand line arguments by using the std::env::args or std::env::args_os functions. Both functions return an iterator over the arguments. The former iterates over Strings (that are easy to work with) but panics if one of the arguments is not valid unicode. The latter iterates over OsStrings and never p...
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Duplicate and rename Xcode project & associated folders [closed]

... This answer is the culmination of various other StackOverflow posts and tutorials around the internet brought into one place for my future reference, and to help anyone else who may be facing the same issue. All credit is given for other answers at the...
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Completion block for popViewController

...ing a modal view controller using dismissViewController , there is the option to provide a completion block. Is there a similar equivalent for popViewController ? ...
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What is the best way to do a substring in a batch file?

... - expands %I to a file extension only %~sI - expanded path contains short names only %~aI - expands %I to file attributes of file %~tI - expands %I to date/time of file %~zI - expands %I to size of file %~$PATH:I - searches the directories listed in the PATH ...
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App Inventor 2 中的响应式设计 · App Inventor 2 中文网

...ng sizes as percentages Fixed vs. responsive sizing Detailed example Special circumstances Limitation: Drawing and animation Responsive design and Google Play One tricky issue in designing apps is making apps that look good on devices with scree...
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jQuery Get Selected Option From Dropdown

Usually I use $("#id").val() to return the value of the selected option, but this time it doesn't work. The selected tag has the id aioConceptName ...
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Centering a view in its superview using Visual Format Language

I just started learning AutoLayout for iOS and had a look at Visual Format Language. 14 Answers ...
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Why all the Active Record hate? [closed]

... @JoãoBragança - perhaps rather than a sarcastic comment, you could actually explain the difficulties that occur when one's data is sharded - so the rest of us can learn something :) – Taryn East N...