//将数组[2,0,6,1,77,0,52,0,25,7]中的 0 去掉后,形成一个不包含0的新数组
var arr = [2, 0, 6, 1, 77, 0, 52, 0, 25, 7];
var newArr = [];
for (var i = 0; i < arr.length; i++) {
if (arr[i] != 0) {
newArr[newArr.length] = arr[i];
}
}
console.log(newArr);