hashidator.rb

require 'hashidator'

schema = {
  :name   => String,
  :age    => (13..25),
  :mail   => /^\S+@\S+\.\S+$/,
  :admin  => Boolean
}

valid = {
  :name   => "Harry",
  :age    => 20,
  :mail   => "[email protected]",
  :admin  => true
}

invalid = {
  :name   => 1234,
  :age    => 45,
  :mail   => "forget it",
  :admin  => "yes"
}

h = Hashidator.new(schema)
h.validate(valid)   #=> true
h.validate(invalid) #=> false