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Extracting the last n characters from a ruby string
...a one liner, you can put a number greater than the size of the string:
"123".split(//).last(5).to_s
For ruby 1.9+
"123".split(//).last(5).join("").to_s
For ruby 2.0+, join returns a string
"123".split(//).last(5).join
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Creating a new column based on if-elif-else condition
...df['C'] = df.apply(f, axis=1)
In [2]: df
Out[2]:
A B C
a 2 2 0
b 3 1 1
c 1 3 -1
Of course, this is not vectorized so performance may not be as good when scaled to a large number of records. Still, I think it is much more readable. Especially coming from a SAS background.
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How to override the [] operator in Python?
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What's a standard way to do a no-op in python?
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edited Dec 18 '09 at 3:41
answered Mar 27 '09 at 17:05
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Why can't decimal numbers be represented exactly in binary?
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364
Decimal numbers can be represented exactly, if you have enough space - just not by floating bi...
How to hide databases that I am not allowed to access
When I connect to my Heroku - Postgresql database via pgAdmin3 , It lists all the tables (about 2600). Every time I open the pgAdmin3 I have to find my own database.
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What is this CSS selector? [class*=“span”]
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It's an attribute wildcard selector. In the sample you've given, it looks for any child elemen...
jQuery hide element while preserving its space in page layout
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edited Mar 2 '12 at 3:13
Wesley Murch
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How to keep Maven profiles which are activeByDefault active even if another profile gets activated?
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Kariem
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answered Sep 20 '11 at 7:07
seanfseanf
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Mercurial (hg) commit only certain files
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