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MySQL - UPDATE query based on SELECT Query
... the second doesn't work in some database such as MySQL. You will get this error : You can't specify target table ___ for update in FROM clause SQL.sql
– Jugali Lakota
Nov 9 '16 at 16:20
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How do you create nested dict in Python?
...he following:
d = {} # can use defaultdict(dict) instead
for row in file_map:
# derive row key from something
# when using defaultdict, we can skip the next step creating a dictionary on row_key
d[row_key] = {}
for idx, col in enumerate(row):
d[row_key][idx] = col
Ac...
Java: Date from unix timestamp
...
This is the right way:
Date date = new Date ();
date.setTime((long)unix_time*1000);
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How do you validate a URL with a regular expression in Python?
...lparse({}) where the input is not even a string succeeds without a visible error
– RubenLaguna
Oct 10 '18 at 12:59
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lenses, fclabels, data-accessor - which library for structure access and mutation is better
... a -> a)
providing two functions: a getter, and a setter
get (Lens g _) = g
put (Lens _ s) = s
subject to three laws:
First, that if you put something, you can get it back out
get l (put l b a) = b
Second that getting and then setting doesn't change the answer
put l (get l a) a = a
A...
Javascript : natural sort of alphanumerical strings
...llator(undefined, {numeric: true, sensitivity: 'base'});
var myArray = ['1_Document', '11_Document', '2_Document'];
console.log(myArray.sort(collator.compare));
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Retrieve list of tasks in a queue in Celery
... Celery.
– mlissner
May 11 '17 at 5:05
1
I've updated the above to handle prioritized tasks. Prog...
Simultaneously merge multiple data.frames in a list
... also on the link from Ramnath. Looks easy enough. But I get the following error: "Error in match.names(clabs, names(xi)) : names do not match previous names". The variables I'm matching on are all present in all the dataframes in the list, so I'm not catching what this error is telling me.
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How to ignore xargs commands if stdin input is empty?
... "x$linecount" = "x0" ]
then
exit 0
fi
fi
# grep returns an error code for no matching lines, so only activate error checks from here
set -e
set -o pipefail
echo $stdin | /usr/bin/xargs $@
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Is there a link to GitHub for downloading a file in the latest release of a repository?
...-N to only download if the file is newer but S3 was giving a 403 Forbidden error.
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