Function makeIterator

mocha_test/filter.js:57–71

(array)

    if (typeof Symbol === 'function' && Symbol.iterator) {
        function makeIterator(array){
            var nextIndex;
            let iterator = {
                next: function(){
                    return nextIndex < array.length ?
                       {value: array[nextIndex++], done: false} :
                       {done: true};
                }
            };
            iterator[Symbol.iterator] = function() {
                nextIndex = 0; // reset iterator
                return iterator;
            };
            return iterator;
        }

        it('filter iterator', function(done){
            var a = makeIterator([500, 20, 100]);