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Bash/sh - difference between && and ;

I normally use ; to combine more than one command in a line, but some people prefer && . Is there any difference? For example, cd ~; cd - and cd ~ && cd - seems to make the same thing. What version is more portable, e.g. will be supported by a bash-subset like Android's shell ...
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Removing the title text of an iOS UIBarButtonItem

What I wanted to do is to remove the text from the 'Back' button of a UIBarButtonItem , leaving only the blue chevron on the navigation bar. Keep in mind that I'm developing for iOS 7. I've tried several methods, including, but not limited to: ...
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Setting variable to NULL after free

...cause the problem with the code structure will always find another way to manifest itself. Finally, if your code is specifically designed to rely on the pointer value being NULL or not NULL, it is perfectly fine to set the pointer value to NULL after free. But as a general "good practice" rule (as ...
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Why do std::shared_ptr work

I found some code using std::shared_ptr to perform arbitrary cleanup at shutdown. At first I thought this code could not possibly work, but then I tried the following: ...
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What's the best way to convert a number to a string in JavaScript? [closed]

What's the "best" way to convert a number to a string (in terms of speed advantage, clarity advantage, memory advantage, etc) ? ...
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What's the cause of this FatalExecutionEngineError in .NET 4.5 beta? [closed]

...ecided it couldn't be a Thread static problem. I think I found a strange manifestation of the same bug though. This code fails with an access violation: class A<T> { static A() { } public A(out string s) { s = string.Empty; } } class B { static void Main() { ...
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What does the LayoutInflater attachToRoot parameter mean?

The LayoutInflater.inflate documentation isn't exactly clear to me about the purpose of the attachToRoot parameter. 12...
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How to provide different Android app icons for different gradle buildTypes?

... answered Apr 5 '14 at 3:27 InsanityOnABunInsanityOnABun 4,88355 gold badges1717 silver badges2525 bronze badges ...
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How can I check if an argument is defined when starting/calling a batch file?

I'm trying to use the following validation logic in a batch file but the "usage" block never executes even when no parameter is supplied to the batch file. ...
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jquery UI dialog: how to initialize without a title bar?

Is it possible to open a jQuery UI Dialog without a title bar? 23 Answers 23 ...