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What is the purpose of setting a key in data.table?
...other vignettes that we plan to.
I've updated this answer again (Feb 2016) in light of the new on= feature that allows ad-hoc joins as well. See history for earlier (outdated) answers.
What exactly does setkey(DT, a, b) do?
It does two things:
reorders the rows of the data.table DT by the c...
Tomcat: How to find out running tomcat version
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edited Feb 6 '19 at 8:19
Svetlin Zarev
8,72433 gold badges3939 silver badges6767 bronze badges
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Java: Equivalent of Python's range(int, int)?
...leSimon Steele
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6
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jQuery - setting the selected value of a select control via its text description
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Select by description for jQuery v1.6+
var text1 = 'Two';
$("select option").filter(function() {
//may want to use $.trim in here
return $(this).text() == text1;
}).prop('selected', true);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqu...
PHP function to generate v4 UUID
...time_low"
mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
// 16 bits for "time_mid"
mt_rand( 0, 0xffff ),
// 16 bits for "time_hi_and_version",
// four most significant bits holds version number 4
mt_rand( 0, 0x0fff ) | 0x4000,
// 16 bits, 8 bit...
How to validate GUID is a GUID
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167
See if these helps :-
Guid guidResult = Guid.Parse(inputString)
(http://msdn.microsoft.com/en...
How do I put a bunch of uncommitted changes aside while working on something else
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edited Jun 30 '16 at 3:19
smoreilly
5555 bronze badges
answered Jul 17 '12 at 9:57
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Comparing two byte arrays in .NET
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622
You can use Enumerable.SequenceEqual method.
using System;
using System.Linq;
...
var a1 = ne...