How to sort a map by value in ja

使用 javascript 对map 按照value排序

const myMap = new Map();

        myMap.set("a",3);

        myMap.set("c",4);

        myMap.set("b",1);

        myMap.set("d",2);

// sort by value

        const mapSort1 = new Map([...myMap.entries()].sort((a, b) => b[1] - a[1]));

        console.log(mapSort1);

// Map(4) {"c" => 4, "a" => 3, "d" => 2, "b" => 1}

const mapSort2 = new Map([...myMap.entries()].sort((a, b) => a[1] - b[1]));

console.log(mapSort2);

// Map(4) {"b" => 1, "d" => 2, "a" => 3, "c" => 4}

// sort by key

const mapSort3 = new Map([...myMap.entries()].sort());

console.log(mapSort3);

// Map(4) {"a" => 3, "b" => 1, "c" => 4, "d" => 2}

const mapSort4 = new Map([...myMap.entries()].reverse());

console.log(mapSort4);

// Map(4) {"d" => 2, "b" => 1, "c" => 4, "a" => 3}

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