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Shoko Ishigaki
21,826 Pointsyield and block.call
I watched all the videos in this course and checked relevant questions, but I'm still not sure the difference between use of yield and block.call
yield self if block_given?
block.call(self)
Can someone help me understand the difference between these codes? Thanks in advance!
1 Answer

Jay McGavren
Treehouse TeacherThere basically is no difference, except that yield
implicitly calls the block without you having to store it in a variable first. So these are mostly equivalent:
def implicit_block
puts yield
end
def explicit_block(&block)
puts block.call
end
implicit_block { 3 } # Prints "3"
explicit_block { 4 } # Prints "4"
But, to me, the implicit_block
style seems a little more convenient in this case.