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What does !! mean in ruby?
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Not not. It's used to convert a value to a boolean:
!!nil #=> false
!!"abc" #=> true...
Git: can I suppress listing of 'modified content'/dirty submodule entries in status, diff, etc?
Somewhen (around the 1.6.x releases, I think) git became aware of changes inside submodules. That only serves to annoy me:
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Using R to list all files with a specified extension
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edited Feb 2 '11 at 16:25
answered Feb 2 '11 at 16:14
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Test iOS app on device without apple developer program or jailbreak
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Seven years after the inception of the App Store (July 10, 2008), Apple has finally introduced a new feature in Xcode 7 that allows you to deploy and run any number of apps on any of your devices, simply by logging in with your Apple ID. You will no longer need a paid Program mem...
How to make jQuery to not round value returned by .width()?
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198
Use the native Element.getBoundingClientRect rather than the style of the element. It was intr...
What is the difference between an annotated and unannotated tag?
...oesn't. An annotated tag has a message that can be displayed with git-show(1), while a tag without annotations is just a named pointer to a commit.
More About Lightweight Tags
According to the documentation: "To create a lightweight tag, don’t supply any of the -a, -s, or -m options, just provid...
Determining type of an object in ruby
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edited Nov 10 '17 at 21:10
answered Apr 2 '13 at 16:53
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Python 3: ImportError “No Module named Setuptools”
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Soham Dongargaonkar
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answered Jan 20 '13 at 16:27
tiagotiago
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How to set an environment variable only for the duration of the script?
On Linux (Ubuntu 11.04) in bash, is it possible to temporarily set an environment variable that will only be different from the normal variable for the duration of the script? For example, in a shell script, making an app that saves to HOME portable by temporarily setting HOME to a folder in the pre...