<script src="https://cdn.staticfile.org/jquery/2.2.4/jquery.min.js"></script>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>文档标题</title>
</head>
<body>
<h2>去重之前：</h2>
<div id="uniqueArrayBefore"></div>
<h2>去重之后：</h2>
<div id="uniqueArrayAfter"></div>
</body>
<script>
var printinfos = [{
printname: "一分钱测试票",
num: 1,
printtime: "2021-09-27 11:09:55"
},
{
printname: "一分钱测试票",
num: 2,
printtime: "2021-09-28 11:09:55"
},
{
printname: "测试票",
num: 5,
printtime: "2021-09-28 11:09:55"
}]
$(function(){
$("#uniqueArrayBefore").text(JSON.stringify(printinfos));
console.log(printinfos);
const res = new Map();
var printinfoArr = printinfos.filter(function(currentValue,index,arr){
if(res.has(currentValue.printname)){
for(var i = 0; i<arr.length; i++){
var obj = arr[i];
if(obj.printname === currentValue.printname){// 对象里的唯一标识printname
obj.num += currentValue.num;
arr[i] = obj;
break;
}
}
return false;
}else{
res.set(currentValue.printname, 1);
return true;
}
});
console.log(printinfoArr);
$("#uniqueArrayAfter").text(JSON.stringify(printinfoArr));
})
</script>
</html>