如何获取分配给JSON数组中相同键的重复值的计数-JavaScript/NodeJS [英] How to get the count of duplicate value assigned to same key in JSON array - JavaScript/NodeJS

问题描述

伙计们，我需要一点帮助才能解决此问题.

Hi Guys i need small help in getting this solved.

如果这是重复的帖子，请指出原始问题.

If this is a duplicate post please point me to the original question.

这里有一个JSON元素数组

Here I have an JSON array of elements

Ex:var consume = [{"key":"Test1"},{"key":"Test2"},{"key":"Test3"},{"key":"Test1"},{"key":"Test3"},{"key":"Test1"}];

预期输出:

var yield = [{"name":"test1","count":3},{"name":"test2","count":2},{"name":"test3","count":2}]

var produce = [{"name":"test1","count":3},{"name":"test2","count":2},{"name":"test3","count":2}]

推荐答案

最后，我用纯JavaScript编写了我的问题的答案.

Finally I wrote Answer to my question in pure javascript.

感谢您的支持人员，他们曾经试图引导我解决我的问题

Thanks for your support guys who ever tried to guide me to solve my question

var consume = [{"key":"Test1"},{"key":"Test2"},{"key":"Test3"},{"key":"Test1"},{"key":"Test3"},{"key":"Test1"}]
 
 var temp = [];
 
 var produce = [];
 
 for(var i=0;i<consume.length;i++){
   if(temp.indexOf(consume[i].key) == -1){
   		temp.push(consume[i].key);
      var _data = {};
      _data.name = consume[i].key;
      _data.count = 1;
      
      produce.push(_data);
   }else{
     for(var j=0;j<produce.length;j++){
     		if(produce[j].name === consume[i].key){
        		var _x = parseInt(produce[j].count) + 1;
            produce[j].count = _x;
        }
     }
   }
 }

console.log(produce);

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