我正试图编写一个加密警报系统，但我遇到了一个问题，所以我有一个名为 getAlerts 返回如下数组：

[{"id":3,"user_id":"1","ticker":"btcusdt","price":41000,"position":"above"},{"id":4,"user_id":"1","ticker":"btcusdt","price":36000,"position":"above"}]

[{"id":1,"user_id":"1","ticker":"btcusdt","price":40000,"position":"below"}]

然后我有一个带有setinterval的websocket，它每1秒检查一次值。如何将websocket中的价格字符串与数组中的所有价格键进行比较，并与它们的用户id键进行比较？假设当前价格与数组中的一个价格键匹配，如何获取匹配键的索引？我在谷歌上搜索了很多，但不幸的是，这些问题比较了两个数组，仍然找不到任何关于匹配键索引的信息。
nodejs代码

const WebSocket = require('ws');

const launchMonitorInstance = (ticker) => {
    let AboveList = [];
    let BelowList = [];

    getAlerts(ticker, "above").then((result) => {
        AboveList = JSON.stringify(result);
    });

    getAlerts(ticker, "below").then((result) => {
        BelowList = JSON.stringify(result);
    });

    const ws = new WebSocket(`wss://stream.binance.com:9443/ws/${ticker}@trade`);
    let coinprice;
    ws.on('message', function incoming(data) {
        let result = JSON.parse(data);
        coinprice = result.p;
    });

    setInterval(() => {
        if (coinprice > AboveList) {
             // get user_id of matched key
            // do something
        }
        if (coinprice < BelowList) {
            // get user_id of matched key
            // do something
        }
    }, 1000);

};