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Concatenate a vector of strings/character
...ta, collapse = '')
Thanks to http://twitter.com/onelinetips/status/7491806343
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Custom Python list sorting
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edited Feb 5 '15 at 17:33
Charlie
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answered Aug 7 '12 at 16:...
Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 2.1. awk的语法有两种形式
2.2. 命令选项
3. 模式和操作
3.1. 模式
3.2. 操作
4. awk的环境变量
5. awk运算符
6. 记录和域
6.1. 记录
6.2. 域
6.3. 域分隔符
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Using Rails 3.1 assets pipeline to conditionally use certain css
I’m in the process of building my first solo Rails app using Rails 3.1.rc5. My problem is that I want to have my site render the various CSS files conditionally. I’m using Blueprint CSS and I’m trying to have sprockets/rails render screen.css most of the time, print.css only when printing,...
How can I obtain an 'unbalanced' grid of ggplots?
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grid.arrange draws directly on the device; if you want to combine it with other grid objects you...
How can I create a copy of an object in Python?
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To get a fully independent copy of an object you can use the copy.deepcopy() function.
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Is there a Python equivalent to Ruby's string interpolation?
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Python 3.6 will add literal string interpolation similar to Ruby's string interpolation. Starting with that version of Python (which is scheduled to be released by the end of 2016), you will be able to include expressions in "f-str...
Ineligible Devices section appeared in Xcode 6.x.x
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Posting a File and Associated Data to a RESTful WebService preferably as JSON
...se64 encode the file, at the expense of increasing the data size by around 33%, and add processing overhead in both the server and the client for encoding/decoding.
Send the file first in a multipart/form-data POST, and return an ID to the client. The client then sends the metadata with the ID, and ...