Ruby/Hash/each key
Материал из Wiki.crossplatform.ru
each_key method passes only the keys to the block
zip = { 1 => "One", 2 => "Two", 3 => "Three", 4 => "Four", 5 => "Five", 6 => "Six", 7 => "Seven", 8 => "Eight", 9 => "Eight" } zip.each_key { |key| print key, " " }
Loop through all keys
zip = { 1 => "A", 2 => "B"} zip.each_key { |key| print key, " " }
