JavaScript 合并数组 - 不修改原数组

function mergeArrays(arr1, arr2) { return arr1.concat(arr2); }

// 示例 const arr1 = [1, 2, 3]; const arr2 = [4, 5, 6]; const mergedArr = mergeArrays(arr1, arr2); console.log(mergedArr); // [1, 2, 3, 4, 5, 6]