default catch return null with try about coffeescript HOT 5 CLOSED

I'm not a huge fan of .try(:symbol) in Rails, but Ruby's postfix rescue is a little better. Note that you can already do this in one line like so:

result: try attempt() catch e then null

Do you think that's too verbose? JavaScript doesn't have very good (or much use of) exceptions. I don't think it's too common to need to catch them and assign the result in a single line.

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Personally it's too verbose for me to use it much. What do you mean by 'nor very good use of' exceptions?
You're probably right that's it's not very good coding practice. More often than not what you are really trying to do is prevent calling methods on null.

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He means that functions that should throw exceptions tend not to.

Using exception handling for anything other than genuine exception handling sounds horrible to me, I vote leaving the syntax as is.

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Yeah, I don't think I want to promote this feature with a language construct. Most places where it occurs in Ruby have hidden bugs where real exceptions (the ones that you aren't expecting) get swallowed by overzealous rescues. If you're just checking for null, then this:

result: try obj.method() catch e then null

Isn't the right way to do it in CoffeeScript either, this is better (and far, far faster):

result: if obj? then obj.method() else null

Closing the ticket.

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Yep - I agree. In fact you can leave out the 'else':

result: if obj? then obj.method()

result: obj.method() if obj?

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