walk in js

gistfile1.js

var walk = function(list, callback) {
  var getCB = function(next) {
    return function(o) {
      callback(o, next)
    };
  },
  handle = function() {
    var item, cb, res = {};
    if(list.length <= 0) {
      return;
    }
    item = list.shift();
    cb = getCB(handle);
    res.data = item;
    cb(res);
  };
  handle();
};

walk(['one', 'two', 'three'], function(o, next) {
  console.log(o.data);
  next();
});