ratio - ℚ in JS

Sometimes you want to handle a ratio as its own entity. Yeah, you could downcast to decimal (though on floating point that's really a crime), or encode it as a string, but neither of those really cuts it.

So why not npm install ratio?

var ratio = require('ratio')
  , half = ratio(4,8)
 
half === 0.5 // true
half.toString() === '1/2' // true
ratio(0.02).toSring() === '1/50'

features

• flexible instantiation:
  • from numerator and denominator
  • from string
  • from decimal number
• nice rendering
  • valueOf() returns numeric form
  • toString() renders fractional form
• automatically reduces fractions on creation
• fraction arithmetic
  • addition with r.plus(x)
  • subtraction with r.minus(x)
  • multiplication with r.times(x)
  • division with r.div(x)
  • reciprocal with r.reciprocal()
  • negative with r.neg()

still to come

• render unicode fractions?