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How to output only captured groups with sed?
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you can use grep
grep -Eow "[0-9]+" file
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django models selecting single field
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It will only fetch this one filed, but if you try to access other fields, a separate database query will be executed. So this is a good optimization technique, but make sure that you do not create these extra queries. Otherwise you will lose performance...
Using printf with a non-null terminated string
... output the first chars (number defined in number_of_chars variable ) to a file, in this case to stdout (the standard output, your screen)!
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Stacked Tabs in Bootstrap 3
...olution worked best: bootstrap-vertical-tabs I just had to include the CSS file... thanks @dbtek!
– msanjay
Jun 26 '14 at 6:39
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What is the easiest/best/most correct way to iterate through the characters of a string in Java?
...hough that most java optimizations happen in the runtime, NOT in the class files. Even if you saw repeated calls to length() that doesn't indicate a runtime penalty, necessarily.
– Isaac
Dec 25 '14 at 9:09
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emacs zoom in/zoom out
...ncrease and text-scale-decrease. I added the following to my configuration file so that I can do Ctrl+Scroll to zoom in/out. It is useful.
(global-set-key [C-mouse-4] 'text-scale-increase)
(global-set-key [C-mouse-5] 'text-scale-decrease)
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Git: How to rebase to a specific commit?
... by each commit of the branch you’re on, saving those diffs to temporary files, resetting the current branch to the same commit as the branch you are rebasing onto, and finally applying each change in turn. I tried it again now and seemed to work just fine.
– r0hitsharma
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Sending data back to the Main Activity in Android
...simple project for sending data back. Rather than providing the xml layout files, here is an image.
Main Activity
Start the Second Activity with startActivityForResult, providing it an arbitrary result code.
Override onActivityResult. This is called when the Second Activity finishes. You can ma...
Are there any smart cases of runtime code modification?
...mple is Transmeta's code morphing software.
Sophisticated debuggers and profilers like Valgrind or Pin use it to instrument your code while it is being executed.
Before extensions were made to the x86 instruction set, virtualization software like VMWare could not directly run privileged x86 code ins...
Git merge two local branches
...o merge branchA with branchB and proceed my work in the branchA . All files are comitted in the branchA and branchB .
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