Question

I have an array short_code[] that contains an array of short product identifiers such as ["11111", "2222", "33333"]

I want to create a copy of the array that contains the corresponding ‘long code’ data:

long_code[i] = my_lookup_long_code(short_code[i])

While simple iteration is easy, I’m wondering, as a relative ruby newbie, what is the ‘ruby way’ to create an array which is a simply method() applied on every element in the original array?

Answer 1

You can use the map command, which will return a new array with the results of your code block:

long_code = short_code.map{ |code| my_lookup_long_code(code) }