src/Ify.js
function onceify(f) {
  var ran, ret;
  return function() {
    return ran ? ret : (ran=true, ret=f.apply(this,arguments));
  };
}
function onceify(f) {
  var ran, ret;
  return function() {
    return ran ? ret : (ran=true, ret=f.apply(this,arguments));
  };
}
function onceify ( f ) { var ran , ret ; return function ( ) { return ran ? ret : ( ran = true , ret = f . apply ( this , arguments ) ) ; } ; }
Make create a version of a function which runs just once on first call. Returns same value on succeeding calls.
Make create a version of a function which runs just once on first call . Returns same value on succeeding calls .