数组对象去重方法：

数组对象去重方法：

  // 数组对象去重

````

  toRetry = (arr = []) => {

    let result = []

    let preResult = []

    // 组装select下拉框数据形式

    arr.map((item) => {

      if(item.userIdentityName) {

        let Obj = {

          text: item.userIdentityName,

          value: item.userIdentityId

        }

        preResult.push(Obj)

      }

    })

    // 对象数组去重

    let preObj = {}

    for(var i =0; i<preResult.length; i++){

        if(!preObj[preResult[i].value]){

        result.push(preResult[i]);

        preObj[preResult[i].value] = true;

        }

    }

    return result

  }

````