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Shell one liner to prepend to a file

... The hack below was a quick off-the-cuff answer which worked and received lots of upvotes. Then, as the question became more popular and more time passed, outraged people started reporting that it sorta worked but weird things could happen, or it just didn't work at all, so it was furi...
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Can you “compile” PHP code and upload a binary-ish file, which will just be run by the byte code int

I know that PHP is compiled to byte code before it is run on the server, and then that byte code can be cached so that the whole script doesn't have to be re-interpreted with every web access. ...
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JavaScript check if variable exists (is defined/initialized)

... @George IV: "just do `if( variable ) " -- um, no, that fails for false and 0. – Jason S May 13 '09 at 15:53 17 ...
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WPF TextBox won't fill in StackPanel

... I've had the same problem with StackPanel, and the behavior is "by design". StackPanel is meant for "stacking" things even outside the visible region, so it won't allow you to fill remaining space in the stacking dimension. You can use a DockPanel with LastChildFill...
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Rsync copy directory contents but not directory itself

... Seems weird and inconsistent to make the trailing slash relevant for just this particular command. Wonder why it hasn't been changed. – Luke Davis Jan 12 '17 at 22:29 ...
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How to know if other threads have finished?

...ted, or Unorthodox, for each Thread in question, call setUncaughtExceptionHandler to call a method in your object, and program each Thread to throw an uncaught Exception when it completes, or Use locks or synchronizers or mechanisms from java.util.concurrent, or More orthodox, create a listener in y...
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How to TryParse for Enum value?

...erything. If you are using bitfield enums (i.e. flags), you also have to handle a string like "MyEnum.Val1|MyEnum.Val2" which is a combination of two enum values. If you just call Enum.IsDefined with this string, it will return false, even though Enum.Parse handles it correctly. Update As mention...
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How to escape indicator characters (i.e. : or - ) in YAML

...ey to which I wish to assign a URL. The problem is that YAML interprets : and - characters as either creating mappings or lists, so it has a problem with the line ...
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Undefined reference to `sin` [duplicate]

...mented as part of the "Single UNIX Specification". This history of this standard is interesting, and is known by many names (IEEE Std 1003.1, X/Open Portability Guide, POSIX, Spec 1170). This standard, specifically separates out the "Standard C library" routines from the "Standard C Mathematical...
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Run an Application in GDB Until an Exception Occurs

I'm working on a multithreaded application, and I want to debug it using GDB. 4 Answers ...