第2个回答 2020-04-23
<script>
var arr = [1, 5, 84, 4894, 44, 45, 454, 444, 515, 3, 4, 84, 4894, 44, 45, 454, 444, 515, 3, 4, 6, 6, 6, 6, 4];
for (var i = 0; i < arr.length; i++) {
if (arr.indexOf(arr[i]) == i) {
var num = 1;
for (var j = i + 1; j < arr.length; j++) {
if (arr[i] === arr[j]) {
num++;
}
}
console.log(arr[i] + "出现的次数是:" + num)
}
}
</script>