# Ruby code for collect!() method
  
# declaring array
a = ["cat", "rat", "geeks"]
  
# invoking block for each element
# returning elements that don't follow
puts "collect a : #{a.collect! {|x| x + "!" }}\n\n"
  
puts "collect a : #{a.collect! {|x| x + "_at" }}\n\n"

collect a : ["cat!", "rat!", "geeks!"]

collect a : ["cat!_at", "rat!_at", "geeks!_at"]

# Ruby code for collect!() method
  
# declaring array
a = [1, 2, 3, 4]
  
# invoking block for each element
# returning elements that don't follow
puts "collect a : #{a.collect! {|x| x + 1 }}\n\n"
  
puts "collect a : #{a.collect! {|x| x - 5*7 }}\n\n"

collect! a : [2, 3, 4, 5]

collect! a : [-33, -32, -31, -30]