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How to prevent gcc optimizing some statements in C?
...urpose of volatile is to let the compiler know that the memory access has side effects, and therefore must be preserved. In this case, the store has the side effect of causing a page fault, and you want the compiler to preserve the page fault.
This way, the surrounding code can still be optimized,...
How to collapse all methods in Xcode?
...ode 9 Beta5 according to beta release note: Resolved in Xcode 9 beta 5 – IDE
Here is how:
Press and hold ⌘ (command) button in keyboard and move/hover mouse cursor on any (start or end) braces. It will automatically highlight, block area.
Keep (hold) ⌘(command) button in pressed condition a...
Is there a way to zoom the Visual Studio text editor with a keyboard shortcut?
... Perfect this was definitely my preferred option. I try to avoid the mouse when I can. :)
– ahsteele
Jun 22 '10 at 19:56
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Running multiple commands in one line in shell
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cp file1 file2 ; cp file1 file3 ; rm file1
If you require that the individual commands MUST succeed before the next can be started, then you'd use && instead:
cp file1 file2 && cp file1 file3 && rm file1
That way, if either of the cp commands fails, the rm will not run....
What does -D_XOPEN_SOURCE do/mean?
...t gcc would not compile without this arg. I checked the gcc man page, but did not find this specific option. I did find XOPEN_SOURCE , but there was little explanation of what it does.
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How to include a child object's child object in Entity Framework 5
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As GraemeMiller said, strongly typed classes are better for maintainability than using strings
– Ryan Amies
Oct 24 '12 at 14:08
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Gradient of n colors ranging from color 1 and color 2
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Added a link which provides better options for color gradients and hues which work in both color and B&W.
– Anusha
Sep 24 '14 at 15:40
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Reload the path in PowerShell
...d I install something that modifies the PATH or I modify it in any way outside of PowerShell then I need to restart PowerShell for it to see the updated PATH variable.
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Rails: how do I validate that something is a boolean?
Does rails have a validator like validates_numericality_of for boolean or do I need to roll my own?
5 Answers
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How to format all Java files in an Eclipse project at one time?
...iles according to the settings in Eclipse. I don't want to edit every individual file with Ctrl + Shift + F . Is there a way to format all my files? Perhaps an Eclipse plugin?
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