rails hash reject key code example

Example 1: ruby hash delete

h = { "a" => 100, "b" => 200 }
h.delete("a")                              #=> 100
h.delete("z")                              #=> nil
h.delete("z") { |el| "#{el} not found" }   #=> "z not found"

Example 2: ruby omit key

hash.except(:key)