<script type="text/javascript">
var items = [1,5,3,4];
$.each(items, function(i,index) {
console.log('this is ' + index);
});
var newItems = $.map(items, function(i,index) {
return i;
});
console.log(newItems)
</script>
2、输出结果:this is 1 this is 5 this is 3 this is 4 [1, 5, 3, 4]
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