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What is the purpose of the var keyword and when should I use it (or omit it)?
What exactly is the function of the var keyword in JavaScript, and what is the difference between
19 Answers
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Aborting a shell script if any command returns a non-zero value?
I have a Bash shell script that invokes a number of commands.
I would like to have the shell script automatically exit with a return value of 1 if any of the commands return a non-zero value.
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Maintain aspect ratio of div but fill screen width and height in CSS?
...ite to put together that has a fixed aspect ratio of approximately 16:9 landscape, like a video.
9 Answers
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How can Xcode 6 adaptive UIs be backwards-compatible with iOS 7 and iOS 6?
...ith Size Classes in Interface Builder DO appear correctly on iOS 7 devices and the Preview in Xcode. For example, I changed some Auto Layout constraints and font sizes for Regular height Regular width and those changed constraints are visible in the iPad Simulator running iOS 7.0.
All size class op...
Is it possible to capture a Ctrl+C signal and run a cleanup function, in a “defer” fashion?
I want to capture the Ctrl+C ( SIGINT ) signal sent from the console and print out some partial run totals.
10 Answers
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How to normalize a NumPy array to within a certain range?
...io /= np.max(np.abs(audio),axis=0)
image *= (255.0/image.max())
Using /= and *= allows you to eliminate an intermediate temporary array, thus saving some memory. Multiplication is less expensive than division, so
image *= 255.0/image.max() # Uses 1 division and image.size multiplications
i...
Get generated id after insert
I'm using the SQLite with Android, and I want to know the best way to get the generated id of the row I inserted.
5 Answers...
Android 4.1: How to check notifications are disabled for the application?
Android 4.1 offers the user a check box to disable notifications for a specific application.
6 Answers
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Why does C# not provide the C++ style 'friend' keyword? [closed]
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Having friends in programming is more-or-less considered "dirty" and easy to abuse. It breaks the relationships between classes and undermines some fundamental attributes of an OO language.
That being said, it is a nice feature and I've used it plenty of times myself in C++; and would lik...
Running PostgreSQL in memory only
...y for this particular question: It's a bad idea to mix with valuable data (and thanks for the warning). For unit-testing with a dedicated DB cluster, a ramdisk is fine.
– Erwin Brandstetter
Jul 12 '15 at 0:32
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