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IN vs OR in the SQL WHERE Clause
... your specific data to see which is faster.
I tried both on a MySQL with 1000000 rows. When the column is indexed there is no discernable difference in performance - both are nearly instant. When the column is not indexed I got these results:
SELECT COUNT(*) FROM t_inner WHERE val IN (1000, 2000, ...
The Ruby %r{ } expression
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%r{} is equivalent to the /.../ notation, but allows you to have '/' in your regexp without havi...
In a javascript array, how do I get the last 5 elements, excluding the first element?
...want to exclude the first element, use
arr.slice(Math.max(arr.length - 5, 0))
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How to access object attribute given string corresponding to name of that attribute
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Antti Haapala
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answered Apr 10 '10 at 7:25
Pratik Deogha...
Get current batchfile directory
...You can get the name of the batch script itself as typed by the user with %0 (e.g. scripts\mybatch.bat). Parameter extensions can be applied to this so %~dp0 will return the Drive and Path to the batch script (e.g. W:\scripts\) and %~f0 will return the full pathname (e.g. W:\scripts\mybatch.cmd).
Y...
Hyphenated html attributes with asp.net mvc
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Use an underscore in the data attribute name, and it'll magically handle it for you, converting...
Disable activity slide-in animation when launching new activity?
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What's the difference between integer class and numeric class in R
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answered May 14 '14 at 17:07
Greg SnowGreg Snow
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Where to put view-specific javascript files in an ASP.NET MVC application?
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answered Jun 23 '11 at 12:07
daveswdavesw
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What's the opposite of head? I want all but the first N lines of a file
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-n, --lines=K output the last K lines, instead of the last 10;
or use -n +K to output lines starting with the Kth
So to filter out the first 2 lines, -n +3 should give you the output you are looking for (start from 3rd).
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