Monkeypatching base JavaScript types (Array, Number) using CoffeeScript!

bits.coffee

Number::log   = (base)-> Math.log(this)/Math.log(base)
Number::pow   = (exp)-> Math.pow(this, exp)
Number::ceil  = -> Math.ceil(this)
Number::floor = -> Math.floor(this)

Array::first  = -> this[0]
Array::last   = -> this[@length-1]
Array::min    = -> @sort().first()
Array::max    = -> @sort().last()
Array::minmax = -> sorted = @sort(); [sorted.first(), sorted.last()]

Number::bits  = -> 
  highest_bit = this.log(2).ceil()
  for bit in [0..highest_bit]
    if this & 2.pow(bit)
      1
    else
      0
      
  
console.log 42.bits()
console.log 255.bits()
console.log 256.bits()
console.log [9,1,2,3,4,5,7].minmax()