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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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test a file upload using rspec - rails
...argument to post was a path helper method, whose only intended argument I didn't enclose in parentheses, so the following tokens were interpreted as additional args to the helper, rather than args for the post itself. E.g., I had post order_documents_path @order, document: file instead of post order...
Does Git Add have a verbose switch
...44890 git.c:415 trace: built-in: git config --get oh-my-zsh.hide-dirty
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How do you manually execute SQL commands in Ruby On Rails using NuoDB
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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