ruby lambda fun

gistfile1.rb

#Basic lambda Hello World
irb(main):122:0> test=lambda{"Hello World"}
=> #<Proc:0x00000001393e28@(irb):122 (lambda)>
irb(main):123:0> test.call
=> "Hello World"
 
#lambda function to remove nth object from an array
irb(main):115:0> str=lambda {|arr,div| arr.each_with_index.map{|x,i| i+=1; next if i % div == 0; x}.compact }
=> #<Proc:0x00000001570a70@(irb):115 (lambda)>
irb(main):116:0> str.call((0..20).to_a, 3)
=> [0, 1, 3, 4, 6, 7, 9, 10, 12, 13, 15, 16, 18, 19]