// 合并两个数组

var a = [1, 2, 4, 8,10];
var b = [3, 6, 7, 8, 11];

function merge(arr1, arr2) {
   const resultArr = [];
   while(arr1.length >0 && arr2.length>0) {
       arr1[0] < arr2[0] ? resultArr.push(arr1.splice(0, 1)[0]) : resultArr.push(arr2.splice(0, 1)[0]);
   }
   return resultArr.concat(arr1, arr2);
}

console.log(merge(a, b)); // 输出[1, 2, 3, 4, 6, 7, 8, 8, 10, 11]

// 字符串