我创建了以下地图:
(function getLakes() {
let lakes = new Map ([['Caspian Sea', 560], ['Tarn Hows', 53], ['Crater Lake', 324], ['Lake Tanganyika', 803], ['Lake Vostok', 546],
['Lake Baikal', 897]]);
let fathom = 1.829;
console.log("The deepest lake is " + Math.max(...lakes.values())*fathom);
})();
除了记录值之外,我还想记录键,以便最终得到以下附加行:
“最深的湖是贝加尔湖。”
我不确定如何进行这项工作-有人知道吗?
谢谢!
最佳答案
展开地图并在条目(Array.find()
对)上使用[key, value]
。使用解构来获取湖泊的名称(键)。
const lakes = new Map([
['Caspian Sea', 560],
['Tarn Hows', 53],
['Crater Lake', 324],
['Lake Tanganyika', 803],
['Lake Vostok', 546],
['Lake Baikal', 897]
]);
const fathom = 1.829;
const max = Math.max(...lakes.values());
const [lake] = [...lakes].find(([, v]) => v === max);
console.log(`The deepest lake is ${max * fathom}`);
console.log(`The deepest lake is ${lake}`);