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PostgreSQL array_agg order
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If you are on a PostgreSQL version < 9.0 then:
From: http://www.postgresql.org/docs/8.4/static/functions-aggregate.html
In the current implementation, the order of the input is in principle unspecified. Supplying the input values from a sorted subquery will usually work, ho...
Timeout jQuery effects
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Update: As of jQuery 1.4 you can use the .delay( n ) method. http://api.jquery.com/delay/
$('.notice').fadeIn().delay(2000).fadeOut('slow');
Note: $.show() and $.hide() by default are not queued, so if you want to use $.delay() with them, you need to configure them that way:
$('.n...
Is there a simple, elegant way to define singletons? [duplicate]
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Generating Guids in Ruby
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Google yields the following Ruby library:
http://raa.ruby-lang.org/project/ruby-guid/
Also, over at http://www.ruby-forum.com/topic/99262 they say you can install a gem (execute gem uuid on the command line to install it) and then do
gem 'uuid'
puts UUID.new
in y...
What regular expression will match valid international phone numbers?
I need to determine whether a phone number is valid before attempting to dial it. The phone call can go anywhere in the world.
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jQuery SVG, why can't I addClass?
... stroke-width: 5;
}
svg circle.green {
fill: green;
}
<script src="https://code.jquery.com/jquery-3.0.0.min.js"></script>
<svg>
<circle cx="50" cy="50" r="25" />
</svg>
The Problem:
The reason the jQuery class manipulation functions do not work with the...
How to close Android application?
...he app. Whether the
* app is killed safely or quickly the app will be completely created as a
* new app in a new virtual machine running in a new process if the user
* starts the app again.
*
* <P>
* <B>NOTE:</B> The app will not be killed until all o...
backbone.js - events, knowing what was clicked
....target can be misleading, you should use ev.currentTarget as described on http://www.quirksmode.org/js/events_order.html
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What is IP address '::1'?
...pback address in IPv6. Think of it as the IPv6 version of 127.0.0.1.
See http://en.wikipedia.org/wiki/Localhost
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Checking if an instance's class implements an interface?
... echo "Yes!";
}
class_implements() is part of the SPL extension.
See: http://php.net/manual/en/function.class-implements.php
Performance Tests
Some simple performance tests show the costs of each approach:
Given an instance of an object
Object construction outside the loop (100,000 iterati...