Question

Have an array of single pair hashes, like this:

arguments = [{:name=>"ABCD"},{:title=>"Awesome"},{:number=>4}]

I need to loop through and pull each one off as a key and value. Right now, I’m doing this:

def methodname(*arguments, &block)
  arguments.each do |arg|
    arg.each do |key, value|
      # use my key and value
    end
  end
  # use the &block here in awesome ways
end

Ick. Gotta be a better way, so I’m asking if someone knows it. I’ve searched and can’t seem to find this particular question on StackOverflow, but let me know if it’s out there.

EDIT: Added context to the code example.

Answer 1

If arguments are expected to be unique…

arguments.inject({},:merge).each { ... }

FWIW – if you can change this data structure, it might be a good idea to do so. This data is better represented in a single hash.

You can also define your method differently and avoid the problem altogether.

irb(main):011:0> def foo(kwargs={},&block)
irb(main):012:1>    pp kwargs
irb(main):013:1> end
irb(main):025:0> foo(:biz=>1,:baz=>2)
{:biz=>1, :baz=>2}
=> nil