javascript - 为什么我的函数返回不同的数组？

Question

我有一些代码旨在执行以下操作:

Given two arrays of strings a1 and a2 return a sorted array r in lexicographical order of the strings of a1 which are substrings of strings of a2.
Arrays are written in "general" notation.

现在我正在做一个测试，其中 array1 = ["arp", "live", "strong"] 和 array2 = ["lively", "alive", "harp ”、“锐利”、“阿姆斯特朗”]。 我想我已经明白了，但我不明白为什么当在最后一个 for 循环中我替换 newArray 时，该函数只返回数组 ["arp", "strong"] 。 splice(l, l+1) 与 newArray.splice(k, k+1)。 谁能告诉我这是为什么？

function inArray(array1, array2) {
    var newArray = [];
    var sortedArray = [];
    for (var i in array2) {
        for (var j in array1) {
            if (array2[i].includes(array1[j])) {
                newArray.push(array1[j]);
            };
        };
    };
    sortedArray = newArray.sort();
    for (var k = 0; k < newArray.length; k++) {
        for (var l = 0; l < newArray.length; l++) {
            if (newArray[k] === newArray[l] && k != l) {
                newArray.splice(l, l + 1)
            }
        }
    }
    return sortedArray;
};

console.log(inArray(["arp", "live", "strong"], ["lively", "alive", "harp", "sharp", "armstrong"]));

Answer 1

看起来你有点过于复杂了;)

a1 = ["arp", "live", "strong", "bazooka"]
a2 = ["lively", "alive", "harp", "sharp", "armstrong"]


result = a1
    .filter(x => a2.some(y => y.includes(x)))
    .sort();

console.log(result);