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An efficient way to transpose a file in Bash
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115
awk '
{
for (i=1; i<=NF; i++) {
a[NR,i] = $i
}
}
NF>p { p = NF }
END {...
How to flatten only some dimensions of a numpy array
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129
Take a look at numpy.reshape .
>>> arr = numpy.zeros((50,100,25))
>>> arr.s...
Should I use a data.frame or a matrix?
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177
Part of the answer is contained already in your question: You use data frames if columns (vari...
Reusable library to get human readable version of file size?
... unit in ['','Ki','Mi','Gi','Ti','Pi','Ei','Zi']:
if abs(num) < 1024.0:
return "%3.1f%s%s" % (num, unit, suffix)
num /= 1024.0
return "%.1f%s%s" % (num, 'Yi', suffix)
Supports:
all currently known binary prefixes
negative and positive numbers
numbers larger tha...
Convert hyphens to camel case (camelCase)
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13 Answers
13
Active
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How to use GROUP BY to concatenate strings in SQL Server?
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18 Answers
18
Active
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How do write IF ELSE statement in a MySQL query
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150
You probably want to use a CASE expression.
They look like this:
SELECT col1, col2, (case wh...
iOS 7 TableView like in Settings App on iPad
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15 Answers
15
Active
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Ukkonen's suffix tree algorithm in plain English
...se, each
edge carries a string label of arbitrary length, but takes only O(1)
space (two pointers).
Basic principle
I would like to first demonstrate how to create the suffix tree of a
particularly simple string, a string with no repeated characters:
abc
The algorithm works in steps, from left...