Question

How to square each element of an array in Ruby

Answer 1

class Array
  def square
    self.map! {|num| num ** 2}
  end
end
   
arr = [1, 2, 3, 4]
 
arr = arr.square
 
print arr
 
 
 
 
 
# run:
# 
# [1, 4, 9, 16]
#

 

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