实现JavaScript forEach时间:2023-03-10 03:55:52 function forEach(list, callback){ for(var n = ; n <list.length; n++){ callback.call(list[n], n); } } var arr = [,,,,,,,] forEach(arr, function(index){ if(this == arr[index]){ console.log("Got the expected value of " + arr[index]); } }) 分享一个代码片段