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How to flatten only some dimensions of a numpy array
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129
Take a look at numpy.reshape .
>>> arr = numpy.zeros((50,100,25))
>>> arr.s...
How to change facet labels?
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128
Change the underlying factor level names with something like:
# Using the Iris data
> i &l...
How do write IF ELSE statement in a MySQL query
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150
You probably want to use a CASE expression.
They look like this:
SELECT col1, col2, (case wh...
MySQL: @variable vs. variable. What's the difference?
...nitialize this variable with a SET statement or inside a query:
SET @var = 1
SELECT @var2 := 2
When you develop a stored procedure in MySQL, you can pass the input parameters and declare the local variables:
DELIMITER //
CREATE PROCEDURE prc_test (var INT)
BEGIN
DECLARE var2 INT;
SET var...
Get Image Height and Width as integer values?
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197
Try like this:
list($width, $height) = getimagesize('path_to_image');
Make sure that:
You...
jQuery Mobile: document ready vs. page events
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jQuery Mobile 1.4 Update:
My original article was intended for old way of page handling, basically everything before jQuery Mobile 1.4. Old way of handling is now deprecated and it will stay active until (including) jQuery Mobile 1.5, so ...
How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
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11
Using phpseclib, a pure PHP RSA implementation...
<?php
include('Crypt/RSA.php');
$rsa = n...
How do you know when to use fold-left and when to use fold-right?
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105
You can transfer a fold into an infix operator notation (writing in between):
This example fo...
Linux command to list all available commands and aliases
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You can use the bash(1) built-in compgen
compgen -c will list all the commands you could run.
compgen -a will list all the aliases you could run.
compgen -b will list all the built-ins you could run.
compgen -k will list all the keywords you co...
How to use GROUP BY to concatenate strings in SQL Server?
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