Question

I have a hash as follows:

drinks = {"soda" => 3, "water" => 2, "beer" => 6}

I would like to show the value of each pair tripled by using each.

In other words, I’d like “soda” to have a value of 9, “water” to have a value of 6, etc.

Answer 1

There are a number of ways to do this, depending on the semantics you want. One way is to operate on each key/value pair with Hash#each. For example:

drinks = {"soda"=>3, "water"=>2, "beer"=>6}
drinks.each { |key, value| drinks[key] = value.to_i * 3 }
=> {"soda"=>9, "water"=>6, "beer"=>18}