Understanding Ruby Blocks, Procs and Lambdas

Re:Understanding Ruby Blocks, Procs and Lambdas by aaronblohowiak on Tuesday December 23, 2008 @12:47AM (#407318)

I respectfully disagree that the return keyword is more trouble than it is worth.

"return false if simple_question?" ... rest of the body

is a very useful thing to do. granted, you might say it is "programming by GOTO", but it lowers the indentation level, and so keeps me happy.

To the GP: we can also .to_proc on blocks.

[ Parent | on HN ]

Re:Understanding Ruby Blocks, Procs and Lambdas by raganwald on Wednesday December 31, 2008 @04:25PM (#415906)

Sorry I didn't see this when you posted it. The problem is not `return :foo if bar()`, it's something like `pizzles.each { |p| return :foo if p.bar() }`. In Ruby, that returns from the surrounding method, not from the block where it's defined.

You can decide for yourself if this behaviour of return more trouble than it's worth. I didn't say it was, I said that this definition is what forces a block to be something different from a proc, which makes the language more complicated.

[ Parent | on HN ]