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What are the most interesting equivalences arising from the Curry-Howard Isomorphism?
...re the terms "necessity" and "possibility" precisely defined in logic? how do they translate to their computational equivalents?
– Tom Crockett
Jul 30 '10 at 10:57
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How to declare a global variable in a .js file
...e, link in the script tags just before the closing <body>-tag if you do not want the load of js-files to interrupt the initial page load.
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Compare two DataFrames and output their differences side-by-side
... to highlight the cells that are different. We define a custom function to do this which you can see in this part of the documentation.
def highlight_diff(data, color='yellow'):
attr = 'background-color: {}'.format(color)
other = data.xs('First', axis='columns', level=-1)
return pd.Data...
Log all queries in mysql
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If you have trouble enabling logging in this manner, doublt-check that the mysql user can write to the appropriate file location.
– Jon Topper
Nov 20 '08 at 16:56
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Using a .php file to generate a MySQL dump
...ote: between shell_exec() and exec(), I would choose the second one, which doesn't return the output to the PHP script -- no need for the PHP script to get the whole SQL dump as a string : you only need it written to a file, and this can be done by the command itself.
That external command will :
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Trigger a Travis-CI rebuild without pushing a commit?
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Don't forget you have to be signed in to see this :P
– Michael J. Calkins
Jan 8 '14 at 22:24
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How to make join queries using Sequelize on Node.js
...bove might look a bit complicated compared to what you posted, but what it does is basically just aliasing all columns of the users table to make sure they are placed into the correct model when returned and not mixed up with the posts model
Other than that you'll notice that it does a JOIN instead...
What is the difference between static_cast and C style casting?
...arch for the keyword "cast" thru out your source files. But want could you do with the c-style casts?
– huangzonghao
May 31 '18 at 16:01
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MySQL: Fastest way to count number of rows
...be the best result. Mysql with MyISAM engine actually stores row count, it doensn't count all rows each time you try to count all rows. (based on primary key's column)
Using PHP to count rows is not very smart, because you have to send data from mysql to php. Why do it when you can achieve the same...
pandas: filter rows of DataFrame with operator chaining
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I'm not entirely sure what you want, and your last line of code does not help either, but anyway:
"Chained" filtering is done by "chaining" the criteria in the boolean index.
In [96]: df
Out[96]:
A B C D
a 1 4 9 1
b 4 5 0 2
c 5 5 1 0
d 1 3 9 6
In [99]: df[(df.A ==...