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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                ### Set是新的數據結構 1. Set數組結構中的數據都是唯一的,類似于數組,但不是數組 2. Set構造函數參數可接收 數組 字符串 類數組對象( DOM數據對象 )等具有 iterable 接口的數據 3. Set去除數據的重復成員 [ ...new Set( arr ) ] 4. Set實例屬性:size || constructor 5. Set實例方法:操作類方法 || 遍歷類方法 6. 操作類:add delete has clear add返回數據結構本身 7. 遍歷類:keys values entries forEach 8. new Set([ 1,2,3 ]) { 1,2,3 } ### WeakSet ### Map數據結構 1. Map構造函數創建的實例類似于對象,也是鍵值對的集合 2. Map對象允許使用對象做為鍵名,在ES5時代使用對象做為鍵名會被轉為字符串 '[ object Object ]',DOM類數組 對象也會被轉換為 '[ htmldivElement ]' 3. let map = new Map() 4. Map操作類方法:get set has delete clear 5. Map遍歷類:keys values entries forEach ### WeakMap
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