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List comprehension vs. lambda + filter
...able (value). That is slower than accessing a local variable and in Python 2.x the list comprehension only accesses local variables. If you are using Python 3.x the list comprehension runs in a separate function so it will also be accessing value through a closure and this difference won't apply.
T...
Column order manipulation using col-lg-push and col-lg-pull in Twitter Bootstrap 3
...h is consisted of length 5, and the other length 5, and finally one length 2 grid.
5 Answers
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Why would I use a templating engine? jsp include and jstl vs tiles, freemarker, velocity, sitemesh
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answered Jul 2 '10 at 20:18
matt bmatt b
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Connect to Amazon EC2 file directory using Filezilla and SFTP
I have created an AWS EC2 Instance and I want to be able to upload files to the server directory using FileZilla in the simplest and most straightforward fashion possible.
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How can I ensure that a division of integers is always rounded up?
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UPDATE: This question was the subject of my blog in January 2013. Thanks for the great question!
Getting integer arithmetic correct is hard. As has been demonstrated amply thus far, the moment you try to do a "clever" trick, odds are good that you've made a mistake. And when a fla...
LaTeX Optional Arguments
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Example from the guide:
\newcommand{\example}[2][YYY]{Mandatory arg: #2;
Optional arg: #1.}
This defines \example to be a command with two arguments,
referred to as #1 and #2 in the {<definition>}--nothing new so far.
But by addi...
INSERT with SELECT
...(name, location, gid)
SELECT name, location, 1
FROM courses
WHERE cid = 2
You can put a constant of the same type as gid in its place, not just 1, of course. And, I just made up the cid value.
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How to trim white spaces of array values in php
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12 Answers
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Creating a new column based on if-elif-else condition
... passing in the axis=1 option:
In [1]: 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 c...
python pandas: apply a function with arguments to a series
...w documentation). So now you can do:
my_series.apply(your_function, args=(2,3,4), extra_kw=1)
The positional arguments are added after the element of the series.
For older version of pandas:
The documentation explains this clearly. The apply method accepts a python function which should have ...