Javascript 数组重建 merging/filtering

Question

我有两个 javascript 阵列一个

var sectors = [
   { name: 'Fishing' }, {name: 'Bowling'}...
];

另一个

var organizations = [
    {name: 'Carson ind', tel: '1545454', fax: 1215454, sectors: ['Banking', 'Fishing']},
    {name: 'Superman & Co.', tel: '1545454', fax: 1215454, sectors: ['Financing', 'Banking']}, 
     ....
    ];

我如何用这两个具有以下结构的数组创建新数组。

var newArray = [
   {sector : 'Banking', organizations : 
    [
      {name: 'Superman & Co.', tel: '1545454', fax: 1215454, sectors: ['Financing', 'Banking']}, 
      ....
    ]
   }
 ];

现在我正在使用下划线和我的代码

    var newArray = [];
    _.each(vm.allSectors, function(sec){
        newArray[sec.name] = _.filter(vm.allOrganizations, function(org) {
           return _.filter(org.sector, function(sector){
              return sector === sec.name;
           });
        });

    });

它没有给我我想要的结果，它只是 return 很多扇区数组。

Answer 1

基本上是 user6188402 的回答，但有固定的 lambdas

result = sectors.map(s => {
    return {
        sector: s.name,
        organizations: organizations.filter(o => o.sectors.indexOf(s.name) > -1)
    }
});

Answer 2

此提案使用一个对象作为所需部门并迭代 organisations 并创建一个新对象并将实际数据插入组织属性。

var sectors = [{ name: 'Fishing' }, { name: 'Bowling' }],
    sectorHash = {},
    organizations = [{ name: 'Carson ind', tel: '1545454', fax: 1215454, sectors: ['Banking', 'Fishing'] }, { name: 'Superman & Co.', tel: '1545454', fax: 1215454, sectors: ['Financing', 'Banking'] }],
    newArray = [];

sectors.forEach(function (a) {
    sectorHash[a.name] = true;
});

organizations.forEach(function (a) {
    a.sectors.forEach(function (b) {
        if (sectorHash[b]) {
            if (!this[b]) {
                this[b] = { sector: b, organzations: [] };
                newArray.push(this[b]);
            }
            this[b].organzations.push(a);
        }
    }, this);
}, Object.create(null));

document.write('<pre>' + JSON.stringify(newArray, 0, 4) + '</pre>');

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