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find -exec with multiple commands
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Alan W. Smith
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answered May 18 '11 at 11:25
TinkerTinker
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When to add what indexes in a table in Rails
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edited Jul 10 '18 at 12:50
answered Sep 7 '10 at 13:17
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Delete all but the most recent X files in bash
...here's no input.
If you have BSD xargs (including on macOS), you can use -0 to handle NUL-separated input, after first translating newlines to NUL (0x0) chars., which also passes (typically) all filenames at once (will also work with GNU xargs):
ls -tp | grep -v '/$' | tail -n +6 | tr '\n' '\0' | ...
What is the in a .vimrc file?
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1025
The <Leader> key is mapped to \ by default. So if you have a map of <Leader>t, yo...
What is Autoloading; How do you use spl_autoload, __autoload and spl_autoload_register?
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Don
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answered Nov 2 '11 at 20:45
BrownbayBrownbay
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二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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基础知识
首先，我们先说一下二维码一共有40个尺寸。官方叫版本Version。Version 1是21 x 21的矩阵，Version 2是 25 x 25的矩阵，Version 3是29的尺寸，每增加一个version，就会增加4的尺寸，公式是：(V-1)*4 + 21（V是版本号） 最...
How to fire AJAX request Periodically?
...t I learned from this excellent video by Paul Irish: http://paulirish.com/2010/10-things-i-learned-from-the-jquery-source/
For periodic tasks that might end up taking longer than the repeat interval (like an HTTP request on a slow connection) it's best not to use setInterval(). If the first request...
How can I get the current screen orientation?
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edited Jul 3 '12 at 18:00
Tim Cooper
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ans...
Django ModelForm: What is save(commit=False) used for?
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That's useful when you get most of your model data from a form, but need to populate some null=...
git remote add with other SSH port
... minimalpop
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answered Aug 29 '10 at 19:38
igorwigorw
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