ruby - How can I turn an array of keys into an array of values? -

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i have hash like

hash = { 'burger': 2, 'kebab': 5, 'pizza': 10 }

and have array of keys like

['burger', 'burger', 'pizza']

how create array of corresponding values? inject method best method sum value array together?

actually, don't need prepare key arrays.

  • to keys: hash.keys
  • to values: hash.values

if want values or values in order, then

a = [:burger, :pizza] hash.values_at(*a) # => [2, 10]

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