利用双重for循环
var arr = [1,9,8,8,7,2,5,3,3,3,2,3,1,4,5,444,55,22]; console.log(arr); function noRepeat(arr){ for (var i = 0; i < arr.length; i++) { for (var j = 0; j < arr.length; j++) { if (arr[i] == arr[j] && i != j) { //将后面重复的数删掉 arr.splice(j, 1); } } } return arr; } var arr2 = noRepeat(arr); console.log(arr2); 利用单层for循环去重 // 单层for循环去重 // Array.splice() 方法用于添加或删除数组中的元素。会改变原数组 let list = ['你是最棒的4', 8, 8, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 1, 2, 3, 4, 5, 6, 7, 8] let newlist5 = []; for (let i = 0; i < list.sort().length; i++) { if (list[i] == list[i + 1]) { list.splice(i, 1) i-- } } console.log('newlist5', list);