数组对象下去重--相同的value

Posted 2020-10-22 最爱小虾

new Set

 

 

      const arr = [{name:"wo"},{name:"shi"},{name:"wo"}]
      console.log([...new Set(arr.map(item=>item.name))].length)//2
      if([...new Set(arr.map(item=>item.name))].length < arr.length){
        let arr2 = [...new Set(arr.map(item=>item.name))]
        console.log(arr2)//["wo", "shi"]
      }

文献：

https://developer.mozilla.org/zh-CN/docs/Web/javascript/Reference/Global_Objects/Set