Blocks are one of Ruby’s great assets. Block's important quality is good code readability and simplicity.
Blocks are the way to create a block of code grouped together. Blocks can take arguments and return values as normal functions. they are not executed where they defined they stored in a veriable passed as argument or return from a function.
For example :--
[ "Ruby", "Java", "PHP"].each { | lang | puts lang }
output --
Ruby
Java
PHP
in abouve example each runs the given block for each element of array.
here lang passed as argument in in block with in || bars and processed.
if you want you can pass more then one argument in blocks by comma seperated.
We can get a block from a function
for example --------
def get_block()
any_message = "Ruby blocks"
return Proc.new{ puts any_message }
end
c = get_block
c.call
output---
Ruby blocks
