js中怎么合并相同数组对象数据

Posted 2023-05-11

参考技术A var a = [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ];
var b = [ "foo", "bar", "baz", "bam", "bun", "fun" ];
var c = a.concat( b );
a; // [1,2,3,4,5,6,7,8,9]
b; // ["foo","bar","baz","bam","bun","fun"]
c; // [1,2,3,4,5,6,7,8,9,"foo","bar","baz","bam","bun","fun"]

js数组对象的相同值相加合并

mergeArr(arr){
        var newArr=[];
          arr.forEach(item => {
          var dataItem = item;
            if(newArr.length>0) {
                var filterValue = newArr.filter(v => {
                  return v.partNo == dataItem.partNo
                })
                if(filterValue.length>0){
                    newArr.forEach(n => {
                      if( n.partNo == filterValue[0].partNo){
                          n.itemQty = filterValue[0].itemQty + dataItem.itemQty
                      } 
                    })
                }else{
                    newArr.push(dataItem)
                }
            }else{
                newArr.push(dataItem)
            }
        })
        return newArr
      }

// js数组对象相同值相加，不同添加

来自互联网参考：https://blog.csdn.net/namechenfl/article/details/93750462