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Python idiom to return first item or None
I'm sure there's a simpler way of doing this that's just not occurring to me.
23 Answers
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Get line number while using grep
I am using grep recursive to search files for a string, and all the matched files and the lines containing that string are print on the terminal. But is it possible to get the line numbers of those lines too??
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How do I determine k when using k-means clustering?
I've been studying about k-means clustering , and one thing that's not clear is how you choose the value of k. Is it just a matter of trial and error, or is there more to it?
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Quickly create large file on a Windows system
In the same vein as Quickly create a large file on a Linux system ,
I'd like to quickly create a large file on a Windows system. By large I'm thinking 5 GB. The content doesn't matter. A built-in command or short batch file would be preferable, but I'll accept an application if there are no other...
Fade/dissolve when changing UIImageView's image
Rather than creating two UIImageViews , it seems logical to simply change the image of one view. If I do that, is there anyway of having a fade/cross dissolve between the two images rather than an instant switch?
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How can I get stock quotes using Google Finance API?
I'm looking for access to financial data from Google services.
13 Answers
13
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Matplotlib transparent line plots
I am plotting two similar trajectories in matplotlib and I'd like to plot each of the lines with partial transparency so that the red (plotted second) doesn't obscure the blue.
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How can I get Git to follow symlinks?
Is my best be going to be a shell script which replaces symlinks with copies, or is there another way of telling Git to follow symlinks?
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How to jump to a particular line in a huge text file?
Are there any alternatives to the code below:
16 Answers
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How do I get current date/time on the Windows command line in a suitable format for usage in a file/
Update: Now that it's 2016 I'd use PowerShell for this unless there's a really compelling backwards-compatible reason for it, particularly because of the regional settings issue with using date . See @npocmaka's https://stackoverflow.com/a/19799236/8479
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