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What exactly is Arel in Rails 3.0?
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What exactly is Arel in Rails 3.0?
It's an object model for an algebra of relational query operators.
I understand that it is a replacement for ActiveRecord
No, it isn't. It's a replacement for hand-crafting SQL queries in strings. It is a common query l...
What are the relationships between Any, AnyVal, AnyRef, Object and how do they map when used in Java
...red a primitive in Java is descendant from AnyVal in Scala. Until Scala 2.10.0, AnyVal was sealed, and programmers were unable to extend it. It should be interesting to see what will happen with Scala on .Net, since interoperability alone calls for Scala to at least recognize user-defined "primitive...
RabbitMQ message size and types
...nt to read up on their performance measures:
http://www.rabbitmq.com/blog/2012/04/17/rabbitmq-performance-measurements-part-1/
http://www.rabbitmq.com/blog/2012/04/25/rabbitmq-performance-measurements-part-2/
Queues are pretty light weight, you will most likely be limited by the number of connection...
There can be only one auto column
... of a composite key?
– Nubcake
Sep 20 '17 at 18:13
What is the syntax when altering the table?
–...
jQuery - get a list of values of an attribute from elements of a class
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answered May 2 '10 at 16:02
KobiKobi
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Debugging automatic properties
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220
Using Visual Studio 2008, 2010, 2012, 2013:
Go to the Breakpoint window
New -> Break at Fun...
How do I use VaryByParam with multiple parameters?
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You can use * for all parameters or a semi-colon separated list (VaryByParam = "customerId;lang...
How do I git rebase the first commit?
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edited May 23 '17 at 12:03
Community♦
111 silver badge
answered Apr 10 '14 at 22:35
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How to include (source) R script in other scripts
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edited Sep 11 '15 at 8:03
Roman
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answered Jun ...
Lowercase and Uppercase with jQuery
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karim79karim79
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