ES6 Map entries()用法及代碼示例

這個函數返回一個iterator包含 Map 中每個元素的鍵值對。

用法

entries() 的語法如下所示

map_name.entries()

示例

<script>
   let andy = {ename:"Andrel"},
      varun = {ename:"Varun"},
      prijin = {ename:"Prijin"}

   let empJobs = new Map([
   [andy,'Software Architect'],
   [varun,'Developer']]
   );

   for(let row of empJobs.entries()){
      console.log("key is ",row[0])
      console.log("value is ",row[1])
   }
</script>

上麵代碼的輸出如下圖所示

key is {ename:"Andrel"}
value is Software Architect
key is {ename:"Varun"}
value is Developer