Ruby's Array() and Array.wrap

July 30, 2019

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Your Teacher

Hi, I'm Chris. I'm the creator of GoRails, and Jumpstart. I spend my time creating tutorials and tools to help Ruby on Rails developers build apps better and faster.

About This Episode

Learn how to remove conditionals and make your code simpler and more reliable using Ruby and ActiveSupport's Array wrap methods


Array([1,2,3]) #=> [1,2,3]
Array(1) #=> [1]
Array(nil) #=> []
Array(a: 1, b: 2) #=> [[:a, 1], [:b, 2]]
require 'active_support/all'

Array.wrap([1,2,3]) #=> [1,2,3]
Array.wrap(1) #=> [1]
Array.wrap(nil) #=> []
Array.wrap(a: 1, b: 2) #=> [{a: 1, b: 2}]
def sum(numbers)
  Array.wrap(numbers).inject(0, :+)

p sum([1,2,3]) #=> 6
p sum(1) #=> 1
p sum(nil) #=> 0

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