CODEWITHSUNDEEP
rubyruby-on-rails-4
Ilya Libin
Ilya Libin

Reputation: 1627

is it possible to use hash keys as a first level variables inside ruby method?

I'll try to explain myself a little bit more

# Lets say I have this hash
options = {a: 1, b: 2}

# and here I'm calling the method
some_method(options)

def some_method(options)
  # now instead of using options[:a] I'd like to simply use a.
  options.delete_nesting_and_create_vars
  a + b # :a + :b also good.

thanks!

Upvotes: 1

Views: 44

Answers (2)

Babar Al-Amin
Babar Al-Amin

Reputation: 3984

If your options are fixed, like only :a and :b are the only keys, you can write the method like this:

def some_method(a:, b:)
  a + b
end

options = {a: 1, b: 2}

some_method(options) #=> 3

Upvotes: 2

Aleksei Matiushkin
Aleksei Matiushkin

Reputation: 121010

Is it possible using Ruby2 splat parameters:

options = {a: 1, b: 2}

def some_method1(a:, b:)
  a + b
end

or:

def some_method2(**options)
  options[:a] + options[:b]
end


some_method1 **options
#⇒ 3
some_method2 **options
#⇒ 3

Upvotes: 4

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