Async forEach in CPS.js

/* async forEach (continuation pass style) */
function forEach (list, cb) {
   var i = 0;

   function next() {
      cb(null, list[i], function () {
         i++;
         if (i == list.length)
            cb('end')
         else
            next()
      })
   }
   next()
}


/* Example usage */

/* Here we use simple async strategy: insert process.nextTick after
 * every 10 items. */
var handler = (function () {

   var i = 0;

   return function  (err, data, done) {
      if (err) return
      /* Do something with our data */
      console.log(data)
      /* insert nextTick sometimes */
      if (i++ % 10 == 0) {
         process.nextTick(done)
      } else {
         done()
      }
   }

})()


var arr = [1,2,3,4,5,6,7,8];

forEach(arr, handler)

Tip: replace process.nextTick(done) with setTimeout(done, 1) and this code would work in browser (in my chromium all ok).