How to implement deduplication algorithm in JSON array in JS

This time I will show you how to implement the deduplication algorithm in JSON array with JS. What are the precautions for JS to implement the deduplication algorithm of JSON array? The following are Let’s take a look at practical cases.

Description of requirements: Remove items with the same paymode field in the JSON array and accumulate paymoney.

paylist:[{paymode:'1',payname:"现金"，paymoney:"20"},
{paymode:'2',payname:"支付宝"，paymoney:"50"},{paymode:'1',payname:"现金"，paymoney:"40"}]

Universal JSON array deduplication

function UniquePay(paylist){
  var payArr = [paylist[0]];
  for(var i = 1; i < paylist.length; i++){
    var payItem = paylist[i];
    var repeat = false;
    for (var j = 0; j < payArr.length; j++) {
     if (payItem.paymode == payArr[j].paymode) {
        payArr[j].paymoney = parseFloat(payArr[j].paymoney)+parseFloat(payItem.paymoney);
         repeat = true;
         break;
     }
   }
       if (!repeat) {
         payArr.push(payItem);
       }
  }
  return payArr;
}

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