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  • js--数组分类

    原数组:

    let arr = [
            {
                id:1,
                key: "计划中",
                value: "E0001"
            },
            {
                id:2,
                key: "已完成",
                value: "E0006"
            },
            {
                id:3,
                key: "计划中",
                value: "E0007"
            },
            {
                id:4,
                key: "已取消",
                value: "E0008"
            }
        ]        

    分类一:

    const getNewArr = arr => {
        let newArr = [];
        arr.map(mapItem => {
          if (newArr.length == 0) {
            newArr.push({ value: mapItem.value, list: [mapItem] });
          } else {
            let res = newArr.some(item => {
              if (item.value == mapItem.value) {
                item.list.push(mapItem);
                return true;
              }
            });
            if (!res) {
              newArr.push({ value: mapItem.value, list: [mapItem] });
            }
          }
        });
        console.log(newArr);
      };

    分类二:

    const getNewArr = arr => {
        let list = arr,
          data = [];
        for (let i = 0; i < list.length; i++) {
          if (!data[list[i].key]) {
            let arr = [];
            arr.push(list[i]);
            data[list[i].key] = arr;
          } else {
            data[list[i].key].push(list[i]);
          }
        }
        console.log(data)
      };

     

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  • 原文地址:https://www.cnblogs.com/Super-scarlett/p/13986425.html
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