Maybe a stupid question but is it possible to use Symbol to_proc even for methods which need an argument?
Nope, it only works on very simple method calls which don't take an argument. Anything more complicated and you will need to use the full block.
Ryan,
Can more than one attribute be combined / concatenated ?
e.g. :
Something like ... (this doesn't work) :
ActorNames = Actor.find(:all).collect(&:last_name + ' ' + &:first_name)
.. neither does :
ActorNames = Actor.find(:all).collect(&:last_name,&:first_name)
Mike
@Mike, nope, you can only call a single method with Symbol to_proc. If you want to combine two methods like you're trying to do, I recommend creating a new "full_name" method in the actor model to do this. That way you're back to calling one method.
Before your readers subscribe to this method, they should be aware of the performance issue.
http://m.onkey.org/2007/6/30/let-s-start-with-wtf
Apparently, nothing beats a good olf-fashioned block
Two ways to do :
1.find(:all).map{|t| t.name}
2.find(:all).collect(&:name)
Symbol to_proc. If you want to combine two methods like you're trying to do, I recommend creating a new "full_name" method in the actor model to do this.
Keep it short and simple. This is what you do!
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Great site. This could probably have the refactoring tag added t it.
Great site. This could probably have the refactoring tag added t it.
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to_proc Symbol. If you want to combine two methods that you try to do, I recommend you create a new "FULL_NAME" model of the actor method to do this.
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Hi Ryan -
Great stuff, but be careful.
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I think this is a great post. One thing that I find the most helpful is number five. Sometimes when I write, I just let the flow of the words and information come out so much that I loose the purpose. It’s only after editing when I realize what I’ve done. There’s defiantly a lot of great tips here I’m going to try to be more aware of.
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