根據(jù)數(shù)組中的某個(gè)字段生成對應(yīng)字段值相同的數(shù)組，例：下面根據(jù)type這個(gè)字段來將type值一致的分到同一數(shù)組。。。

let arr = [
        {regulationsId: 5172, title: "測試111標(biāo)題2 ", type: 610, state: 1, createdTime: 1530152467000},
        {regulationsId: 5169, title: "測試111標(biāo)題", type: 610, state: 1, createdTime: 1530085573000},
        {regulationsId: 5170, title: "測試123標(biāo)題", type: 609, state: 1, createdTime: 1530085687000},
        {regulationsId: 5171, title: "測試1122標(biāo)題", type: 608, state: 1, createdTime: 1530085750000}
    ];
    
    //獲取數(shù)組中有多少個(gè)type
    let types = [];
    
    arr.map((item, index) => {
        if(types.indexOf(item.type) === -1){
            types.push(item.type)
        }
    })
    
    //一個(gè)包含多個(gè)list的結(jié)果對象
    let obj = [];
    
    // 根據(jù)type生成多個(gè)數(shù)組
    types.map((typeItem, typeIndex) => {
        arr.map((arrItem,  arrIndex) => {
            if(arrItem.type == typeItem){
                obj[typeIndex] = obj[typeIndex] || [];
                obj[typeIndex].push(arrItem)
            }
        })
    })

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