一旦你這樣做：const currencies = [euro, yen];沒有從back 到或從back 到 的鏈接。獲取和變量的值并將這些值放入數(shù)組中。currencies[0]eurocurrencies[1]yen[euro, yen]euroyen嘗試對(duì)您所擁有的進(jìn)行最小的更改，您可以使用對(duì)象而不是數(shù)組：for (let [currencyName, currencyValue] of Object.entries({euro, yen})) {        const pair = await fetchPairData(currencyValue, dollar);    const route = new Route([pair], dollar);    console.log(currencyName, currencyValue + route.midPrice.toSignificant(6));}我有一個(gè)坐標(biāo)列表，通過它在地圖上設(shè)置標(biāo)記。標(biāo)記僅以小于 12 的放大倍數(shù)出現(xiàn)在地圖上。我想使當(dāng)我單擊標(biāo)記時(shí)執(zhí)行某些功能，并且僅執(zhí)行一次?，F(xiàn)在事情是這樣的：for (let i = 0; i < locationsCoordinates.length; i++) {    const bridge = locationsCoordinates[i];    markers.push( new google.maps.Marker({        position: bridge[1],        title: bridge[0],        map,        icon: 'img/bridges.png',        clickable: true,    }));}google.maps.event.addListener(map, 'zoom_changed', function() {    let zoom = map.getZoom();    if (zoom < 12) {        for (let i = 0; i < markers.length; i++) {            markers[i].setVisible(false);            markers[i].addListener("click", function (event) {                test +=1;            });            }        }     else {        for (let i = 0; i < markers.length; i++) {            markers[i].setVisible(true);        }    }})問題是，對(duì)于這樣的代碼，當(dāng)您單擊任何標(biāo)記時(shí)，該函數(shù)會(huì)運(yùn)行多次。