查找两个有序数组最小元素

var arr1 = [1, 2, 3, 4, 5];

var arr2 = [2, 3, 4, 5, 9];

for (var i = 0; i < arr1.length; i++) {

if (arr2.indexOf(arr1[i]) > -1) {

console.log(arr1[i]);

break;

}

}