Over a million developers have joined DZone.

Switch The Items Around In An Array

·

a = [['b2','a1'],['d2','c1']]
a.map!{|x,y| [y,x]}          # => [["a1", "b2"], ["c1", "d2"]]

# or

a.map!{|x| x.reverse}        # => [["a1", "b2"], ["c1", "d2"]]

# or

a.map!(&:reverse)            # => [["a1", "b2"], ["c1", "d2"]]
Topics:

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}