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What command means “do nothing” in a conditional in Bash?
...s greater than "10", print "1" if $a is less than "5", otherwise, print "2":
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How to tell whether a point is to the right or left side of a line
I have a set of points. I want to separate them into 2 distinct sets. To do this, I choose two points ( a and b ) and draw an imaginary line between them. Now I want to have all points that are left from this line in one set and those that are right from this line in the other set.
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Most efficient way to store thousand telephone numbers
... the first m bits are 1...11 - this last count is 1000(decimal). There are 2^m such counts and each count is at most 1000. If we omit the last one (because we know it is 1000 anyway), we can store all of these numbers in a contiguous block of (2^m - 1) * 10 bits. (10 bits is enough for storing a num...
Fast check for NaN in NumPy
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Ray's solution is good. However, on my machine it is about 2.5x faster to use numpy.sum in place...
How to write header row with csv.DictWriter?
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Edit:
In 2.7 / 3.2 there is a new writeheader() method. Also, John Machin's answer provides a simpler method of writing the header row.
Simple example of using the writeheader() method now available in 2.7 / 3.2:
from collections imp...
calculating the difference in months between two dates
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How to compare two dates?
...t; datetime(3000, 1, 1) < present
False
>>> present - datetime(2000, 4, 4)
datetime.timedelta(4242, 75703, 762105)
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How to create a bash script to check the SSH connection?
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