javascript - 在日期属性中按天按数组重新分组

Question

如何创建一个在日期属性中按天重新组合数组的函数

例如我有这个数组..

var _array = [ 
{name:"sample1" ,date:'08-07-2017'}, 
{name:"sample2" ,date:'08-07-2017'},
{name:"sample3" ,date:'08-08-2017'},
{name:"sample4" ,date:'08-09-2017'},
{name:"sample5" ,date:'08-09-2017'},
{name:"sample5" ,date:'08-09-2017'},
];

然后我调用函数重新分组

regroup_byday(_array);

预期输出为

{ 
   [
    {name:"sample1" ,date:'08-07-2017'}, 
    {name:"sample2" ,date:'08-07-2017'},
   ],

   [
   {name:"sample3" ,date:'08-08-2017'}, 
   ],

   [
    {name:"sample4" ,date:'08-09-2017'},
    {name:"sample5" ,date:'08-09-2017'},
    {name:"sample5" ,date:'08-09-2017'},
   ]
};

提前致谢! ..

Answer 1

以下内容应产生您正在寻找的所需输出:

var _array = [
{name:"sample1" ,date:'08-07-2017'}, 
{name:"sample2" ,date:'08-07-2017'},
{name:"sample3" ,date:'08-08-2017'},
{name:"sample4" ,date:'08-09-2017'},
{name:"sample5" ,date:'08-09-2017'},
{name:"sample5" ,date:'08-09-2017'}
];

var regrouped = [];

for (var i = 0; i < _array.length; i++) {
  var addNew = true;
  for (var j = 0; j < regrouped.length; j++) {
    if (_array[i].date === regrouped[j][0].date) {
      regrouped[j].push(_array[i]);
      addNew = false;
    }
  }
  if (addNew) {
    regrouped.push([_array[i]]);
  }
}

console.log(regrouped);