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How to get the ASCII value of a character
...t; chr(97)
'a'
>>> chr(ord('a') + 3)
'd'
>>>
In Python 2, there is also the unichr function, returning the Unicode character whose ordinal is the unichr argument:
>>> unichr(97)
u'a'
>>> unichr(1234)
u'\u04d2'
In Python 3 you can use chr instead of unichr.
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Add a prefix string to beginning of each line
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edited Oct 25 '18 at 22:35
PhysicalChemist
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“PKIX path building failed” and “unable to find valid certification path to requested target”
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How do I iterate through each element in an n-dimensional matrix in MATLAB?
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You can use linear indexing to access each element.
for idx = 1:numel(array)
element = arra...
How to alter a column and change the default value?
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ALTER TABLE foobar_data MODIFY COLUMN col VARCHAR(255) NOT NULL DEFAULT '{}';
A second possi...
Any gotchas using unicode_literals in Python 2.6?
We've already gotten our code base running under Python 2.6. In order to prepare for Python 3.0, we've started adding:
6 A...
How to test which port MySQL is running on and whether it can be connected to?
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209
To find a listener on a port, do this:
netstat -tln
You should see a line that looks like t...
Can I use a binary literal in C or C++?
...le itoa function, or implement your own.
Unfortunately you cannot do base 2 formatting with STL streams (since setbase will only honour bases 8, 10 and 16), but you can use either a std::string version of itoa, or (the more concise, yet marginally less efficient) std::bitset.
#include <boost/ut...
Postgres: INSERT if does not exist already
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Postgres 9.5 (released since 2016-01-07) offers an "upsert" command, also known as an ON CONFLICT clause to INSERT:
INSERT ... ON C...
How to draw border around a UILabel?
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You can set label's border via its underlying CALayer property:
#import <QuartzCore/Quartz...