What Does. Map Return Ruby

Ruby | Enumerable map() function The map() of enumerable is an inbuilt method in Ruby returns a new array with the results of running block once for every element in enum. The object is repeated every time for each enum. In case no object is given, it return nil for each enum.

Can you map a hash in Ruby?

Map is a Ruby method that you can use with Arrays, Hashes & Ranges. The main use for map is to TRANSFORM data. For example: Given an array of strings, you could go over every string & make every character UPPERCASE.

What does array map Do Ruby?

Ruby | Array map() function Array#map() : map() is a Array class method which returns a new array containing the values returned by the block. Return: a new array containing the values returned by the block.