From Metaprogamming Ruby Page 113. In Ruby 1.8, Kernel#proc() is actually a synonym for Kernel#lambda(). Because of loud protest from programmers, Ruby 1.9 made proc() a synonym for Proc.new() instead.
This is one of the main differences between Procs and lambdas. A return in a Proc returns from its enclosing block/method, while a return in a lambda simply returns from the lambda. When you call the lambda inside the func_two, it simply returns its value in place, which is not saved. Read on Procs v. … Read more
Ruby has three constructs: A block is not an object and is created by { … } or do … end. A proc is a Proc object created by Proc.new or proc. A lambda is a Proc created by lambda (or proc in Ruby 1.8). Ruby has three keywords that return from something: return terminates … Read more
Simply use next in this context: $ irb irb(main):001:0> def thing(*args, &block) irb(main):002:1> value = block.call irb(main):003:1> puts “value=#{value}” irb(main):004:1> end => nil irb(main):005:0> irb(main):006:0* thing { irb(main):007:1* return 6 * 7 irb(main):008:1> } LocalJumpError: unexpected return from (irb):7:in `block in irb_binding’ from (irb):2:in `call’ from (irb):2:in `thing’ from (irb):6 from /home/mirko/.rvm/rubies/ruby-1.9.1-p378/bin/irb:15:in `<main>’ irb(main):009:0> thing … Read more