![[用JS來寫演算法和了解資料結構] Data Structures - Hash Table - Day6 Map](/gallery/014.jpeg)
[用JS來寫演算法和了解資料結構] Data Structures - Hash Table - Day6 Map
Map
The Map object holds key-value pairs and remembers the original insertion order of the keys.
elements in an array do not repeat -> use
Setelements in an object do not repeat -> use
Map
both have size, has(), and keys().與Object有點類似，但Map裡面的key是唯一的，重複set會覆蓋舊的value
Map的key除了原始型別外，可以是任何值object或function