前端小知识

ShenlxX

于 2017-05-23 20:04:01 发布

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分类专栏：前端

本文链接：https://blog.youkuaiyun.com/ShenlxX/article/details/72657582

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本文介绍了一种利用JavaScript中的Map思想对前端JSON数据进行快速去重的方法。通过创建两个临时JSON对象，分别用于存储需要去重的数据字段，并最终输出去重后的结果。

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在前端以map的思想将json中的数据快速去重

var param = [
    {"area":520303,"L1":"预计","L2":"游客流失预警","L3":243414.00,"L4":500000.00},
    {"area":520303,"L1":"预计","L2":"收入流失预警","L3":413414.00,"L4":500000.00},
    {"area":520303,"L1":"预计","L2":"商户流失预警","L3":533414.00,"L4":500000.00},
    {"area":520303,"L1":"实际","L2":"游客流失预警","L3":343414.00,"L4":500000.00},
    {"area":520303,"L1":"实际","L2":"收入流失预警","L3":313414.00,"L4":500000.00},
    {"area":520303,"L1":"实际","L2":"商户流失预警","L3":333414.00,"L4":500000.00}
];

var json = {},json1= {};
for(var i =0;i<param.length;i++){
    json[param[i].L1] = "";
    json1[param[i].L2] = param[i].L4;
}
for (var key in json1)
    {
        console.log(key);
        console.log(json1[key]);
    }
console.log(json);
console.log(json1);