unorderedmap、multiMap、unordered_multimap?
1. Map
let map = new Map();
map.set('key1', 'value1');
map.set('key2', 'value2');2. Unordered Map(无序的 Map)
let obj = { key1: 'value1', key2: 'value2' }; // 对象的键值对存储无序3. Multimap(多重映射)
4. Unordered Multimap(无序多重映射)
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