Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.
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.