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Best way to find the intersection of multiple sets?
... use multiple arguments to set.intersection(), like
u = set.intersection(s1, s2, s3)
If the sets are in a list, this translates to:
u = set.intersection(*setlist)
where *a_list is list expansion
Note that set.intersection is not a static method, but this uses the functional notation to apply ...
How to select the nth row in a SQL database table?
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31 Answers
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Convert NSArray to NSString in Objective-C
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edited Mar 11 '14 at 12:14
alexyorke
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Generate random numbers uniformly over an entire range
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How to install a specific version of a ruby gem?
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1182
Use the -v flag:
$ gem install fog -v 1.8
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jQuery Set Select Index
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NOTE: answer is dependent upon jQuery 1.6.1+
$('#selectBox :nth-child(4)').prop('selected', true); // To select via index
$('#selectBox option:eq(3)').prop('selected', true); // To select via value
Thanks for the comment, .get won't work since it returns a ...
Declaring and initializing variables within Java switches
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114
Switch statements are odd in terms of scoping, basically. From section 6.3 of the JLS:
The...
How to detect if a script is being sourced
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SQL query for finding records where count > 1
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FROM
PAYMENT
GROUP BY
account,
user_id ,
date
Having
COUNT(*) > 1
Update
If you want to only include those that have a distinct ZIP you can get a distinct set first and then perform you HAVING/GROUP BY
SELECT
user_id,
account_no ,
date,
COUNT(*)
FROM
(SELECT...
How can I auto-elevate my batch file, so that it requests from UAC administrator rights if required?
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15 Answers
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