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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...
Redirect Windows cmd stdout and stderr to a single file
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Abel
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answered Sep 14 '09 at 11:23
Anders LindahlAnders Lindahl
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How to keep Maven profiles which are activeByDefault active even if another profile gets activated?
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Kariem
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answered Sep 20 '11 at 7:07
seanfseanf
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How to retrieve form values from HTTPPOST, dictionary or?
...lue1 = model.SimpleProp1;
var value2 = model.SimpleProp2;
var value3 = model.ComplexProp1.SimpleProp1;
...
... return something ...
}
Another (obviously uglier) way is:
[HttpPost]
public ActionResult SubmitAction()
{
var value1 = Request["SimpleProp1"];
var value2 = Reque...
R data formats: RData, Rda, Rds etc
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answered Jan 26 '14 at 22:53
KenMKenM
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Group by with multiple columns using lambda
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AducciAducci
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What is the difference between assert, expect and should in Chai?
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edited May 23 '17 at 12:10
Community♦
111 silver badge
answered Jan 28 '14 at 12:01
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Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
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answered Dec 13 '12 at 1:37
BrenBarnBrenBarn
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