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Random record in ActiveRecord
...e current record count) as an offset.
offset = rand(Model.count)
# Rails 4
rand_record = Model.offset(offset).first
# Rails 3
rand_record = Model.first(:offset => offset)
To be honest, I've just been using ORDER BY RAND() or RANDOM() (depending on the database). It's not a performance issue ...
Heroku NodeJS http to https ssl forced redirect
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As of today, 10th October 2014, using Heroku Cedar stack, and ExpressJS ~3.4.4, here is a working set of code.
The main thing to remember here is that we ARE deploying to Heroku. SSL termination happens at the load balancer, before encrypted traffic re...
Javascript when to use prototypes
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Daniel EarwickerDaniel Earwicker
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How to read multiple text files into a single RDD?
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ChrisWue
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answered Jun 4 '14 at 11:35
samthebestsamthebest
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How do you round a floating point number in Perl?
...sprintf() or printf() is usually the easiest
route.
printf("%.3f", 3.1415926535); # prints 3.142
The POSIX module (part of the standard Perl distribution) implements
ceil(), floor(), and a number of other mathematical and trigonometric
functions.
use POSIX;
$ceil = ceil(3.5);...
Calculating sum of repeated elements in AngularJS ng-repeat
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148
In Template
<td>Total: {{ getTotal() }}</td>
In Controller
$scope.getTotal = fu...
When should I use a struct instead of a class?
...Choosing Between Classes and Structures.
Basically, that page gives you a 4-item checklist and says to use a class unless your type meets all of the criteria.
Do not define a structure unless the
type has all of the following
characteristics:
It logically represents a single valu...
Python dictionary: Get list of values for list of keys
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answered Aug 26 '13 at 21:45
FazJaxtonFazJaxton
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Tri-state Check box in HTML?
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edited Oct 27 '18 at 23:48
Community♦
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answered Jan 18 '11 at 12:48
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How to colorize diff on the command line?
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