# Mathish

the two halves of my tasty brain

## Quirks of Array#each

I’m probably just late to the party, but at least with Ruby 1.8.7 and 1.9.2, there’s nothing special that has to be done for each of these examples to produce the same output:

[ [1, 2, 3], [4, 5, 6], [7, 8, 9] ].each do |trip|
puts "#{trip[0]} / #{trip[1]} / #{trip[2]}"
end

[ [1, 2, 3], [4, 5, 6], [7, 8, 9] ].each do |a,b,c|
puts "#{a} / #{b} / #{c}"
end

[ [1, 2, 3], [4, 5, 6], [7, 8, 9] ].each do |(a,b,c)|
puts "#{a} / #{b} / #{c}"
end

I knew that wrapping the block parameters in parentheses worked when arrays were yielded to the block. I did not realize that Ruby would automatically do this when presented with a block that takes multiple parameters.