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MYSQL OR vs IN performance
...than using OR.
Do not believe people who give their "opinion", science is all about testing and evidence.
I ran a loop of 1000x the equivalent queries (for consistency, I used sql_no_cache):
IN: 2.34969592094s
OR: 5.83781504631s
Update:
(I don't have the source code for the original test, as it...
PowerShell: Store Entire Text File Contents in Variable
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To get the entire contents of a file:
$content = [IO.File]::ReadAllText(".\test.txt")
Number of lines:
([IO.File]::ReadAllLines(".\test.txt")).length
or
(gc .\test.ps1).length
Sort of hackish to include trailing empty line:
[io.file]::ReadAllText(".\desktop\git-python\test.ps1")....
Still Reachable Leak detected by Valgrind
All the functions mentioned in this block are library functions. How can I rectify this memory leak?
5 Answers
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Proper REST response for empty table?
Let's say you want to get list of users by calling GET to api/users , but currently the table was truncated so there are no users. What is the proper response for this scenario: 404 or 204 ?
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Showing a different background colour in Vim past 80 characters
... Mono 11 font and the molokai color scheme. You can find my vim config and all of my dotfiles on GitHub.
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Why are only final variables accessible in anonymous class?
...used in an anonymous inner class or lambda expression though.
It's basically due to the way Java manages closures.
When you create an instance of an anonymous inner class, any variables which are used within that class have their values copied in via the autogenerated constructor. This avoids th...
Select N random elements from a List in C#
... time you get to the end you will have your 5 items, and often you'll have all of them before that.
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Changing image sizes proportionally using CSS?
I have been trying for a couple of days now to configure my thumbnail gallery so all the images appear the same height and width. However when I change the Css code to,
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How to change max_allowed_packet size
...ading files larger than approx 1MB I get an error Packets larger than max_allowed_packet are not allowed.
12 Answers
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Ruby on Rails: how do I sort with two columns using ActiveRecord?
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Assuming you're using MySQL,
Model.all(:order => 'DATE(updated_at), price')
Note the distinction from the other answers. The updated_at column will be a full timestamp, so if you want to sort based on the day it was updated, you need to use a function to ...