Why is Proc in ruby return before executing remaining codes in a method from which Proc was called?
def hello
a = Proc.new{ return }
a.call
puts "Hello"
end
def proc
hello
puts "Proc"
end
Here return will skip puts "Hello" and prints only puts "Proc"
But lambda prints puts "Hello" as well.
What's the reason for this?
You should see comment in this answer https://stackoverflow.com/a/723/4576274.
It states
A lambda is an anonymous method. Since it's a method, it returns a value, and the method that called it can do with it whatever it wants, including ignoring it and returning a different value.
A Proc is like pasting in a code snippet. It doesn't act like a method. So when a return happens within the Proc, that's just part of the code of the method that called it
def find_even; [1, 2, 3].each {|elem| return elem if elem.even? }; end. So, if that's the case, use block/proc. if you want the opposite, use lambda.lambdain the code.