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Static extension methods [duplicate]
Is there any way I can add a static extension method to a class.
4 Answers
4
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pandas GroupBy columns with NaN (missing) values
...Missing Data section of the docs:
NA groups in GroupBy are automatically excluded. This behavior is consistent with R, for example.
One workaround is to use a placeholder before doing the groupby (e.g. -1):
In [11]: df.fillna(-1)
Out[11]:
a b
0 1 4
1 2 -1
2 3 6
In [12]: df.fillna(-1...
How Do You Clear The IRB Console?
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On Mac OS X or Linux you can use Ctrl + L to clear the IRB screen.
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String formatting: % vs. .format vs. string literal
...on 2.6 introduced the str.format() method with a slightly different syntax from the existing % operator. Which is better and for what situations?
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Add a prefix string to beginning of each line
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# If you want to edit the file in-place
sed -i -e 's/^/prefix/' file
# If you want to create a new file
sed -e 's/^/prefix/' file > file.new
If prefix contains /, you can use any other character not in prefix, or
escape the /, so the sed command becomes
's#^#/opt/workdir#'
# or...
用Javascript获取页面元素的位置（全） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...mpat"){
return {
width: Math.max(document.body.scrollWidth,
document.body.clientWidth),
height: Math.max(document.body.scrollHeight,
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Java code To convert byte to Hexadecimal
...want each byte String of that array to be converted to its corresponding hexadecimal values.
19 Answers
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GetType() can lie?
...cessfully lied, right?
Well, yes and no... Consider that using this as an exploit would mean using your BadFoo instance as an argument to a method somewhere, that expects likely an object or a common base type for a hierarchy of objects. Something like this:
public void CheckIfInt(object ob)
{
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Converting numpy dtypes to native python types
..., how do I automatically convert it to its closest python data type? For example,
12 Answers
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HTML 5 tag vs Flash video. What are the pros and cons?
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