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I need a Nodejs scheduler that allows for tasks at different intervals [closed]
...* * * * *' - runs every 5 seconds
'10,20,30 * * * * *' - run at 10th, 20th and 30th second of every minute
'0 * * * * *' - runs every minute
'0 0 * * * *' - runs every hour (at 0 minutes and 0 seconds)
But also more complex schedules e.g.
'00 30 11 * * 1-5' - Runs every weekday (Monday through Fr...
Create an index on a huge MySQL production table without table locking
...ed to create an index on a ~5M rows MySQL table. It is a production table, and I fear a complete block of everything if I run a CREATE INDEX statement...
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General suggestions for debugging in R
...r silver bullet. There are good strategies for debugging in any language, and they apply here too (e.g. read this nice article). For instance, the first thing is to reproduce the problem...if you can't do that, then you need to get more information (e.g. with logging). Once you can reproduce it, ...
Hidden Features of C++? [closed]
... that it can be used as an lvalue:
(a == 0 ? a : b) = 1;
which is shorthand for
if (a == 0)
a = 1;
else
b = 1;
Use with caution :-)
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edited Jan 7 '09 at 21:...
Failed loading english.pickle with nltk.data.load
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I had this same problem. Go into a python shell and type:
>>> import nltk
>>> nltk.download()
Then an installation window appears. Go to the 'Models' tab and select 'punkt' from under the 'Identifier' column. Then click Download and it will install the...
Any way to modify Jasmine spies based on arguments?
...ent parameters. I'd like to mock this external API out with a Jasmine spy, and return different things based on the parameters. Is there any way to do this in Jasmine? The best I can come up with is a hack using andCallFake:
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Is JSON Hijacking still an issue in modern browsers?
I am using Backbone.js and the Tornado web server. The standard behavior for receiving collection data in Backbone is to send as a JSON Array.
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Android static object lifecycle
...ulate in another screen then user can edit search criteria from 3rd screen and goes to 4th screen.
4 Answers
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Convert list of dictionaries to a pandas DataFrame
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As of Pandas 0.19.2, there's no mention of this in the documentation, at least not in the docs for pandas.DataFrame
– Leo Alekseyev
Apr 13 '17 at 22:56
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Dynamic variable names in Bash
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Use an associative array, with command names as keys.
# Requires bash 4, though
declare -A magic_variable=()
function grep_search() {
magic_variable[$1]=$( ls | tail -1 )
echo ${magic_variable[$1]}
}
If you can't use associative arrays (e.g., you m...