Test to see if a number is a number in Ruby. Useful because: "I am a string".to_i returns 0, which is an an Integer.... so my string will test positive for a number.

test a number in Ruby.rb

def isInt?(number)
  true if Integer(number) rescue false
end

isInt?("13")

result = true if Integer("12") rescue false # true
result = true if Integer("test") rescue false #false
result = true if Float("test") rescue false #false
result = true if Float(13.2) rescue false #true