比較兩個數組是否相等

const compare = (() => {
        function compareArray(a, b) {
            if (a.length !== b.length) {
                return false;
            }
            const length = a.length;
            for (let i = 0; i < length; i++) {
                if (!compare(a[i], b[i])) {
                    return false;
                }
            }

            return true;
        }

        function compareObject(a, b) {
            const keya = Object.keys(a);
            const keyb = Object.keys(b);

            if (keya.length !== keyb.length) {
                return false;
            }

            return keya.every(key => {
                if (!compare(a[key], b[key])) {
                    return false;
                }
                return true;
            });
        }

        function compare(a, b) {
            if (a === b) {
                return true;
            }

            if (typeof a !== typeof b || a === null || b === null) {
                return false;
            }

            if (Array.isArray(a)) {
                if (!Array.isArray(b)) {
                    return false;
                }
                return compareArray(a, b);
            }

            if (typeof a === "object") {
                return compareObject(a, b);
            }

            return false;
        }

        return compare;
    })();

使用方法
a和b都爲數組
console.log(compare(a, b))複製代碼