Question

我在JavaScript中有员工信息的数组结构

var emplyeeinfo=[{
    empNo: 12302,
    empId: '30984',
    empJobCategory: 'Designer',
  },
  {
    empNo: 14785,
    empId: '33420',
    empJobCategory: 'Associate Manager',
  },
  {
    empNo: 13710,
    empId: '32603',
    empJobCategory: 'Designer',
  },
  {
    empNo: 13783,
    empId: '32675',
    empJobCategory: 'Designer',
  },
  {
    empNo: 15069,
    empId: '33619',
    empJobCategory: 'Designer',
  },
  {
    empNo: 14285,
    empId: '33020',
    empJobCategory: 'Validator',
  },
  {
    empNo: 14476,
    empId: '33185',
    empJobCategory: 'Designer',
  }];

并希望根据以上信息构建数组

var employeejob=[{'Designer':[12302,13710,13783,15069,14476]},
                    {'Associate Manager':[14785]},
                    {'Validator':'[14285]}
                    ];

我没有找到任何适当的机制来在JavaScript中构建这个数组，并且从这个数组想要为高图表系列构建以下数组

    var finalchart={series:[7,5,1,1], 
category:['Total','Designer','Associate Manager','Validator']};

Answer 1

试试这个：

// Your new object
var obj = {};
// loop through the objects in array
employeeinfo.map(function(e){
   // check if the object is already created or not
   if(!obj[e.empJobCategory]){
       // if not created then initialize it as an array
       obj[e.empJobCategory] = [];
   }
   // push the new empNo in the created/present array
   obj[e.empJobCategory].push(e.empNo);
});

// see the output
console.dir(obj);

<强> Working Fiddle

也可以使用Array.reduce()完成。

var obj = employeeinfo.reduce(function(p, c, i, a) {
  if (!p[c.empJobCategory]) {
    p[c.empJobCategory] = [];
  }
  p[c.empJobCategory].push(c.empNo);
  return p;
}, {});

console.dir(obj);

<强> Working Fiddle

Answer 2

您可以尝试其他方式

function groupBy( array , f )
{
  var groups = {};
  array.forEach( function( o )
  {
    var group = JSON.stringify( f(o) );
    groups[group] = groups[group] || [];
    groups[group].push( o.empNo );  
  });
  return Object.keys(groups).map( function( group )
  {
    return groups[group]; 
  })
}

然后

var result = groupBy(employeeinfo, function(item)
{
  return [item.empJobCategory];
});

印刷品

console.dir(result)

javascript中的数组和对象处理，用于获取highchart json数据

2 个答案: