JS遍历方法与forEach对比

数组遍历方式与forEach对比

    let policy = {"ips": 0,"waf": 0,"pvs": 1};

    let filterArr = Object.keys(policy).filter((key) => {
        return policy[key] === 0;
    });
    console.log(filterArr); // [ 'ips', 'waf' ]

    let policy = {"ips": 0,"waf": 0,"pvs": 1};

    let filterArr = [];
    Object.keys(policy).forEach((key) => {
        if (policy[key] === 0) {
            filterArr.push(key);
        }
    });
    console.log(filterArr); // [ 'ips', 'waf' ]

    const TEXT_TYPE = {
        ips: '未配置漏洞攻击防护策略',
        waf: '未配置WEB应用防护策略',
        pvs: '未配置实时漏洞分析策略'
    };

    // 找出未配置策略对应的文案信息
    let mapArr = filterArr.map((key) => {
        return TEXT_TYPE[key];
    });
    console.log(mapArr); // [ '未配置漏洞攻击防护策略', '未配置WEB应用防护策略' ]

    const TEXT_TYPE = {
            ips: '未配置漏洞攻击防护策略',
            waf: '未配置WEB应用防护策略',
            pvs: '未配置实时漏洞分析策略'
        };

    let mapArr = [];
    filterArr.forEach((key) => {
        mapArr.push(TEXT_TYPE[key]);
    });
    console.log(mapArr); // [ '未配置漏洞攻击防护策略', '未配置WEB应用防护策略' ]

    // 判定是否是立体防护完备
    let someBoolean = Object.keys(policy).some((key) => {
        return policy[key] === 0;
    });
    console.log(someBoolean); // true

    let everyBoolean = Object.keys(policy).every((key) => {
        return policy[key] > 0;
    });
    console.log(everyBoolean); // false

    let someBoolean = false;
    Object.keys(policy).forEach((key) => {
        if (policy[key] === 0) {
            someBoolean = true;
            return false;
        }
    });