Is there a method to limit/clamp a number?

user_376113 0
Viewed 10100

I wrote the following code, which keeps x within the range (a..b). In pseudo code: 

(if x < a, x = a; if x > b, x = b)

In Ruby it would be something like:

x = [a, [x, b].min].max

As it is quite basic and useful function, I was wondering if there is a native method to do that in ruby.

As of Ruby 2.3.3 there is apparently no method like this, what would be the shortest/more readable way to do it?

I found:

x = [a, x, b].sort[1]

so far, but I'm not sure if it is more readable.

clamp ruby
5 Answers

Here is my solution which borrows heavily from the actual implementation:

unless Comparable.method_defined? :clamp
  module Comparable
    def clamp min, max
      if max-min<0
        raise ArgumentError, 'min argument must be smaller than max argument'
      end
      self>max ? max : self<min ? min : self
    end
  end
end
user_89608400
Related