按数组某字段维度求和

//组装方法
  function groupBy(array, f) {
    let groups = {};
    array.forEach(function (o) {
      let group = JSON.stringify(f(o));
      groups[group] = groups[group] || [];
      groups[group].push(o);
    });
    return Object.keys(groups).map(function (group) {
      return groups[group];
    });
  }

let list = []; //要处理的数组
let sorted = groupBy(list, function (item) {
    return [item.dateField_l65uepgf]; //开始日期
  });

//求和方法
function sum(arr) {
    var s = 0;
    for (var i = arr.length - 1; i >= 0; i--) {
      s += arr[i];
    }
    return s;
  } 

 var sumed = [];
  sorted.forEach(d=>{
    var gg = d.map(g => g.numberField_leibu0hx);
    var dd = d.map(p => p.numberField_l64uq2up);
    var yy = d.map(y => y.numberField_l8ceukh9);
   
    let ret = {
      "numberField_leibu0hx": sum(gg), //应收金额
      "numberField_l64uq2up": sum(dd), //待收金额
      "numberField_l8ceukh9": sum(yy), //优惠
      "dateField_l65uepgf": d[0].dateField_l65uepgf, //开始日期
      "dateField_l65uepgg": d[0].dateField_l65uepgg, //结束日期      
    };
    sumed.push(ret); 
  })
  console.log("sumed", sumed)

//组装结束

//其他功能：通过某个值过滤数组

var newtab = [];
  var total = 0;
  for(var m=0;m<tablist.length;m++){
    total += tablist[m].numberField_ldjphnt4;
    if (total <= money)
      newtab.push(tablist[m])
    else
      break
  }