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Rails 3: Get Random Record
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I am working on a project (Rails 3.0.15, ruby 1.9.3-p125-perf) where the db is in localhost and users table has a bit more than 100K records.
Using
order by RAND()
is quite slow
User.order("RAND(id)").first
becomes
SELECT users.* FROM users ORDER BY RAND(id) LI...
How do I use .toLocaleTimeString() without displaying seconds?
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325
You can always set the options, based on this page you can set, to get rid of the seconds, some...
Why is it said that “HTTP is a stateless protocol”?
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answered Nov 2 '12 at 17:25
Rahul TripathiRahul Tripathi
146k2525 gold badges220220 silver badges285285 bronze badges
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ASP.NET MVC controller actions that return JSON or partial html
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edited Aug 7 '09 at 19:25
Eduardo Molteni
36.5k2222 gold badges133133 silver badges201201 bronze badges
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90后创业四年:曾经觉得不公 后来愿赌服输 - 资讯 - 清泛网 - 专注C/C++及内核技术
...代表的90后创业者群体，争议从未远离，但他们有的已满25岁，这是告别年少轻狂的年纪。
下面是他的故事。
2011年下半年，我还在读大学二年级，就尝到了一夜成名的滋味。那年国庆节过后，我在人人网上开发了一个小应用叫...
What is the difference between Factory and Strategy patterns?
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25
Just to add to what tvanfosson said, a lot of the patterns look the same as far as implementati...
throwing an exception in objective-c/cocoa
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answered Nov 27 '08 at 17:25
e.Jamese.James
106k3737 gold badges165165 silver badges207207 bronze badges
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Pass an array of integers to ASP.NET Web API?
...your pick?
– David Rettenbacher
Mar 25 '15 at 14:21
12
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Django: Get an object form the DB, or 'None' if nothing matches
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25
@sleepycal I disagree. The first() works exactly as it suppose to. It returns the first object in query result and doesn't cares if multipl...
Java: How to get input from System.console()
... In case we want to read password from user, stackoverflow.com/questions/22545603/… masks the line with asterisk.
– oraclesoon
Mar 22 '17 at 11:05
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