FAQ: Blocks, Procs, and Lambdas - Try It Yourself!

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This community-built FAQ covers the “Try It Yourself!” exercise from the lesson “Blocks, Procs, and Lambdas”.

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[matrenitski]

def double(param)
  yield(param)
end

puts double(8) {|x| x * 2 }

It is a nice thing to be able to have lots of tools, but it makes me wonder, in which use-cases using these weird constructions would be preferable?

[stephenfralich584732]

I found this discussion which makes the purpose of yield much clearer with only a slightly more complicated example. They really don’t do a good job of explaining why it’s useful.

https://www.codecademy.com/en/forum_questions/51c72e759c4e9d410501df42

[7226321346]

I’m curious about its possible use scenarios too!