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How do you extract a column from a multi-dimensional array?
Does anybody know how to extract a column from a multi-dimensional array in Python?
20 Answers
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Convert Python program to C/C++ code? [closed]
...nces. And the interfacing with Python you get in all cases where you use C from Python.
– Lennart Regebro
Jan 10 '11 at 19:30
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Python, remove all non-alphabet chars from string
... data, I have found this post Stripping everything but alphanumeric chars from a string in Python which shows a nice solution using regex, but I am not sure how to implement it
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.gitignore is ignored by Git
...r current changes, or you will lose them.
Then run the following commands from the top folder of your Git repository:
git rm -r --cached .
git add .
git commit -m "fixed untracked files"
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ByteBuffer.allocate() vs. ByteBuffer.allocateDirect()
...ects in Java, and
the way data is stored inside that
object could vary from one JVM
implementation to another.
For this reason, the notion of a
direct buffer was introduced. Direct
buffers are intended for interaction
with channels and native I/O routines.
They make a best effort ...
Why does Ruby 1.9.2 remove “.” from LOAD_PATH, and what's the alternative?
... @Joshua Cheek: Also, as a sort-of counterbalance to removing . from $LOAD_PATH, Ruby 1.9.2 introduces require_relative which ... surprise ... require s a file relative to the location of the currently executing file (i.e. relative to File.dirname(__FILE__) ).
– Jör...
Force SSL/https using .htaccess and mod_rewrite
...om/htaccess/http-https-rewriterule-redirect.html
You can also solve this from within PHP in case your provider has disabled .htaccess (which is unlikely since you asked for it, but anyway)
if (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] !== 'on') {
if(!headers_sent()) {
header("Sta...
Drop unused factor levels in a subsetted data frame
...- factor(subdf$letters)
> subdf$letters
[1] a b c
Levels: a b c
EDIT
From the factor page example:
factor(ff) # drops the levels that do not occur
For dropping levels from all factor columns in a dataframe, you can use:
subdf <- subset(df, numbers <= 3)
subdf[] <- lapply(subd...
How to scale down a range of numbers with a known min and max value
...ange of say 1-30. I have methods that find the minimum and maximum values from my data set, but I won't have the min and max until runtime. Is there an easy way to do this?
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How to get the second column from command output?
...t the lines on "s:
awk -F '"' '{print $2}' your_input_file
or for input from pipe
<some_command> | awk -F '"' '{print $2}'
output:
A B
C
D
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