JavaScript utility belt

utilitybelt.js

//A continual schmorgasboard of code that probably exists in a better documented & executed function elsewhere.

//Produces a # between min and max.
function between(min,max) {
    var d = Math.abs(min - max);
    return min + Math.random() * d;
}

//Integer between min & max.
function intBetween(min,max) {
    return Math.floor(between(min,max))
}


function mapValue(per, min, max) {
    var diff = max - min;
    return min + (diff * per * 2);
}

//Produces a number from 0 - max
function ranRange(max) {
   return -max + (Math.random() * (max * 2));
}

//Degrees to radians.
function deg2rad(d) {
  return d * (Math.PI / 180);
}

//The other way around.
 function rad2deg(r) {
     return r * (180 / Math.PI);
 }