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12.利用函数反转数组

<script>
//利用函数翻转任意数组 reverse 翻转
function reverse(arr) {
let newArr = [];
for (let i = arr.length - 1; i >= 0; i--) {
newArr[newArr.length] = arr[i];
}
return newArr;
}
var arr1 = reverse([1, 3, 5, 6, 9]);
console.log(arr1);
var arr2 = reverse(["pink", "blue", "red"]);
console.log(arr2);
</script>

 


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