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GROUP_CONCAT ORDER BY

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How to write multiple line property value using PropertiesConfiguration?

I have a properties file with a property with a List value (comma separated), how to write this property in a multi-line ? (backslash after the comma)? ...
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LAST_INSERT_ID() MySQL

I have a MySQL question that I think must be quite easy. I need to return the LAST INSERTED ID from table1 when I run the following MySql query: ...
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Find the extension of a filename in Ruby

I'm working on the file upload portion of a Rails app. Different types of files are handled differently by the app. 4 Answ...
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How to sort the result from string_agg()

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LINQPad [extension] methods [closed]

Does anyone have a complete list of LINQPad extension methods and methods, such as 4 Answers ...
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What is the difference between t.belongs_to and t.references in rails?

What is the difference between t.references and t.belongs_to ? Why are we having those two different words? It seems to me they do the same thing? Tried some Google search, but find no explanation. ...
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How to ignore xargs commands if stdin input is empty?

Consider this command: 6 Answers 6 ...
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Specify pane percentage in tmuxinator project

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Rails: where does the infamous “current_user” come from?

I've been looking around recently into Rails and notice that there are a lot of references to current_user . Does this only come from Devise? and do I have to manually define it myself even if I use Devise? Are there prerequisites to using current_user (like the existence of sessions, users, etc)...