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Why are side-effects modeled as monads in Haskell?
...o, you're still missing my point here. Of course you wouldn't use that mindset for any of those specific types, because they have clear, meaningful structure. When I say "arbitrary monads" I mean "you don't get to pick which one"; the perspective here is from inside the quantifier, so thinking of m ...
Regular expression to match non-ASCII characters?
...+
It matches any character which is not contained in the ASCII character set (0-127, i.e. 0x0 to 0x7F).
You can do the same thing with Unicode:
[^\u0000-\u007F]+
For unicode you can look at this 2 resources:
Code charts list of Unicode ranges
This tool to create a regex filtered by Unicod...
Best way to convert text files between character sets?
...he fastest, easiest tool or method to convert text files between character sets?
20 Answers
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Maven2 property that indicates the parent directory
...
Try setting a property in each pom to find the main project directory.
In the parent:
<properties>
<main.basedir>${project.basedir}</main.basedir>
</properties>
In the children:
<properties&...
Remove all files except some from a directory
...o the following -
export GLOBIGNORE=*.php:*.sql
rm *
export GLOBIGNORE=
Setting GLOBIGNORE like this ignores php and sql from wildcards used like "ls *" or "rm *". So, using "rm *" after setting the variable will delete only txt and tar.gz file.
...
surface plots in matplotlib
I have a list of 3-tuples representing a set of points in 3D space. I want to plot a surface that covers all these points.
...
Border around specific rows in a table?
...
Understood, I needed that too. Enclose the set of rows you want a border around in their own tbody, and the above css will create a border around the set of them -- i.e., a top border on the top row, a bottom border on the bottom row, and left and right borders on all...
How to track child process using strace?
...c
(anon)
+-- touch /tmp/ppp.sleep
+-- killall -HUP pppd
+-- amixer set Speaker 70%
+-- amixer set Speaker 70%
+-- amixer set Speaker 70%
+-- amixer set Speaker 70%
+-- amixer set Speaker 50%
+-- amixer set Speaker 70%
`-- amixer set Speaker 50%
The output can be used to help na...
Create a dictionary with list comprehension
...ere is the mapping part. What makes this a dict comprehension instead of a set comprehension (which is what your pseudo-code approximates) is the colon, : like below:
mydict = {k: v for k, v in blahs}
And we see that it worked, and should retain insertion order as-of Python 3.7:
>>> mydict...
Python dictionary: Get list of values for list of keys
...: 2, 'three': 3}
mykeys = ['three', 'one'] # if there are many keys, use a set
[mydict[k] for k in mykeys]
=> [3, 1]
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