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Index on multiple columns in Ruby on Rails
...:user_id, :article_id], you can perform a fast query on user_id or user_id AND article_id, but NOT on article_id.
Your migration add_index line should look something like this:
add_index :user_views, [:user_id, :article_id]
Question regarding 'unique' option
An easy way to do this in Rails ...
Removing multiple files from a Git repo that have already been deleted from disk
... Git repo that I have deleted four files from using rm ( not git rm ), and my Git status looks like this:
29 Answers
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eclipse stuck when building workspace
...ook at How to report a deadlock. You may also want to check the Error view and/or the error log ([workspace]/.metadata/.log). If that doesn't help, you'll probably need to include more info about which plugins you have installed and which projects you have. Can you create a minimal workspace which r...
How to recursively delete an entire directory with PowerShell 2.0?
What is the simplest way to forcefully delete a directory and all its subdirectories in PowerShell? I am using PowerShell V2 in Windows 7.
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Latest jQuery version on Google's CDN
...DN team has joined us in this effort to prevent
inadvertent web breakage and no longer updates the file at
http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js. That file
will stay locked at version 1.11.1 as well.
The following, now moot, answer is preserved here for historical reasons.
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Generic htaccess redirect www to non-www
...th the double slashes. So I did RewriteRule ^(.*)$ http://%1$1 [R=301,L] and it seems to be working so far
– bobfet1
Mar 22 '12 at 13:59
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In PHP with PDO, how to check the final SQL parametrized query? [duplicate]
... order to have a full solution for the record. But have to thank Ben James and Kailash Badu which provided the clues for this.
Short Answer
As mentioned by Ben James: NO.
The full SQL query does not exist on the PHP side, because the query-with-tokens and the parameters are sent separately to the ...
Exception NoClassDefFoundError for CacheProvider
I'm kind of new in Spring and hibernate so I'm trying to implement some simple web application based on Spring 3 + hibernate 4
while I start tomcat I have this exception:
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Disable a group of tests in rspec?
I have a test spec which describes a class and within that has various contexts each with various it blocks.
7 Answer...
For each row in an R dataframe
I have a dataframe, and for each row in that dataframe I have to do some complicated lookups and append some data to a file.
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