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Finding differences between elements of a list
...gt;> [j-i for i, j in zip(t[:-1], t[1:])] # or use itertools.izip in py2k
[2, 3]
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Fastest way to determine if an integer's square root is an integer
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filter items in a python dictionary where keys contain a specific string
...natory, as it reads like English pretty well.
This syntax requires Python 2.7 or greater.
In Python 3, there is only dict.items(), not iteritems() so you would use:
filtered_dict = {k:v for (k,v) in d.items() if filter_string in k}
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ios app maximum memory budget
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It's just that we wanted to put as much stuff as we could (graphics & sounds). Artists will always want to put as much as they possibly ...
Random record in ActiveRecord
... a table via ActiveRecord. I've followed the example from Jamis Buck from 2006 .
25 Answers
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Inline labels in Matplotlib
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Nice question, a while ago I've experimented a bit with this, but haven't used it a lot because...
Functions that return a function
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Assigning a variable to a function (without the parenthesis) copies the reference to the functi...
How to validate an Email in PHP?
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You can use the filter_var() function, which gives you a lot of handy validation and sanitizat...
MySQL: Insert record if not exists in table
...able_listnames` (
`id` int(11) NOT NULL auto_increment,
`name` varchar(255) NOT NULL,
`address` varchar(255) NOT NULL,
`tele` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
Insert a record:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'Rupert', 'S...