普通容易理解的方式

[zhangzhangjing]

const arr = [10, 21, 0, -7, 35, 7, 9, 23, 18]
var pos = 0
var num = arr[0]
for (var i = 1; i < arr.length; i++) {
if (arr[i] > 0 && arr[i] < num) {
num = arr[i]
pos = i
}
}
return pos