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How do I delete rows in a data frame?
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84
You can also work with a so called boolean vector, aka logical:
row_to_keep = c(TRUE, FALSE, T...
How to terminate a Python script
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You can also use simply exit().
Keep in mind that sys.exit(), exit(), quit(), and os._exit(0) ...
How to round up the result of integer division?
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For C# the solution is to cast the values to a double (as Math.Ceiling takes a double):
int nP...
How to make fill height
...'s a solution that also works in Firefox: stackoverflow.com/questions/36575846/…
– Wouter
Apr 12 '16 at 14:43
To mak...
Convert all first letter to upper case, rest lower for each word
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84
I probably prefer to invoke the ToTitleCase from CultureInfo (System.Globalization) than Thread...
What's the difference between eval, exec, and compile?
... = '42 * a'
>>> result = eval(my_calculation)
>>> result
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exec and eval both accept the program/expression to be run either as a str, unicode or bytes object containing source code, or as a code object which contains Python bytecode.
If a str/unicode/bytes containing source c...
STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...中，编译程序：
f:\vs2008\vc\include\functional(143) : error C2784: “bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)”: 无法从“const a”为“const std::_Tree<_Traits> &”推导 模板 参数
1> f:\vs2008\vc\include\xtree(1466) : 参见“st...
YouTube Video Embedded via iframe Ignoring z-index?
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<iframe width="420" height="315" src="http://www.youtube.com/embed/C4I84Gy-cPI?wmode=transparent" frameborder="0" allowfullscreen>
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What's the best way to develop a sideswipe menu like the one in Facebook's new iOS app?
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There is a great library for this by Tom Adriaenssen: Inferis/ViewDeck
It's very easy to use a...
Start a git commit message with a hashmark (#)
...(Q3 2014) will add an automatic selection for core.commentChar:
See commit 84c9dc2
When core.commentChar is "auto", the comment char starts with '#' as in default but if it's already in the prepared message, find another char in a small subset. This should stop surprises because git strips some lin...
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