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Get current time in seconds since the Epoch on Linux, Bash
I need something simple like date , but in seconds since 1970 instead of the current date, hours, minutes, and seconds.
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Git Commit Messages: 50/72 Formatting
Tim Pope argues for a particular Git commit message style in his blog post:
http://www.tpope.net/node/106 .
5 Answers
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data.table vs dplyr: can one do something well the other can't or does poorly?
I'm relatively familiar with data.table , not so much with dplyr . I've read through some dplyr vignettes and examples that have popped up on SO, and so far my conclusions are that:
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Command line CSV viewer? [closed]
Anyone know of a command-line CSV viewer for Linux/OS X? I'm thinking of something like less but that spaces out the columns in a more readable way. (I'd be fine with opening it with OpenOffice Calc or Excel, but that's way too overpowered for just looking at the data like I need to.) Having ...
Git command to show which specific files are ignored by .gitignore
I am getting my feet wet with Git and have the following issue:
9 Answers
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Are list-comprehensions and functional functions faster than “for loops”?
In terms of performance in Python, is a list-comprehension, or functions like map() , filter() and reduce() faster than a for loop? Why, technically, they run in a C speed , while the for loop runs in the python virtual machine speed ?.
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How to tell if a string is not defined in a Bash shell script
If I want to check for the null string I would do
12 Answers
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App Inventor 2 列表代码块 · App Inventor 2 中文网
... 搜索 App Inventor 2 列表代码块
创建空列表
创建列表
追加列表项
检查列表中是否包含对象
求列表长度
列表是否为空？
随机选取列表项
求...
vector vs. list in STL
I noticed in Effective STL that
16 Answers
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Reading a plain text file in Java
It seems there are different ways to read and write data of files in Java.
28 Answers
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