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How to check if a value exists in an array in Ruby
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1974
You're looking for include?:
>> ['Cat', 'Dog', 'Bird'].include? 'Dog'
=> true
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How do I fetch lines before/after the grep result in bash?
...n use the -B and -A to print lines before and after the match.
grep -i -B 10 'error' data
Will print the 10 lines before the match, including the matching line itself.
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Blocks on Swift (animateWithDuration:animations:completion:)
...es:
UIView.animateWithDuration(0.2, animations: {
self.blurBg.alpha = 1
}, completion: {
(value: Bool) in
self.blurBg.hidden = true
})
The important part here is the (value: Bool) in. That tells the compiler that this closure takes a Bool labeled 'value' and returns void.
For referen...
What is the purpose of the '@' symbol in CSS?
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@ has been around since the days of @import in CSS1, although it's arguably becoming increasin...
Is there a Google Voice API? [closed]
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No, there is no API for Google Voice as of 2019.
"pygooglevoice" can perform most of the voice functions from Python. It can send SMS. I've developed code to receive SMS messages, but the overhead is excessive given the current Google Voice interface. Each poll retu...
How to install psycopg2 with “pip” on Python?
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#ifdef in C#
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163
#if DEBUG
bool bypassCheck=TRUE_OR_FALSE;//i will decide depending on what i am debugging
#els...
How to check if anonymous object has a method?
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answered Jun 9 '10 at 15:48
Sean VieiraSean Vieira
134k2828 gold badges272272 silver badges265265 bronze badges
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In Git, how can I write the current commit hash to a file in the same commit
...recommend doing something similar to what you have in mind: placing the SHA1 in an untracked file, generated as part of the build/installation/deployment process. It's obviously easy to do (git rev-parse HEAD > filename or perhaps git describe [--tags] > filename), and it avoids doing anything...
Programmatically Hide/Show Android Soft Keyboard [duplicate]
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Adding ...