Javascript 嵌套集合的Lodash映射
我有以下收藏:Javascript 嵌套集合的Lodash映射,javascript,lodash,Javascript,Lodash,我有以下收藏: var realty = { name: 'Realty A', entrances: [ { name: 'Entrance A', units: [ {name: 'unitA', contracts: [{contractNo: 'no.963'}, {contractNo: 'no.741'}]}, {name: 'unitB', contracts: [{contractNo: 'no.789'},
var realty = {
name: 'Realty A',
entrances: [
{
name: 'Entrance A',
units: [
{name: 'unitA', contracts: [{contractNo: 'no.963'}, {contractNo: 'no.741'}]},
{name: 'unitB', contracts: [{contractNo: 'no.789'}, {contractNo: 'no.564'}]}
]
},
{
name: 'Entrance B',
units: [
{name: 'unitC', contracts: [{contractNo: 'no.419'}, {contractNo: 'no.748'}]},
{name: 'unitD', contracts: [{contractNo: 'no.951'}, {contractNo: 'no.357'}]}
]
}
]
}
我正试图提取合同集合。
我尝试使用lodash“map”函数,如下所示:
\uuu.map(realty,'entals.units.contracts')
但是'property'迭代在数组上不起作用
知道如何提取所有合同的集合吗?也许lodash chain能帮上忙,但我不知道如何使用它:/。这似乎能奏效
_(realty.entrances).flatMap('units').flatMap('contracts').value()
一种不含lodash的可能性
var contractsArray = []
realty.entrances.forEach( e => {
let units = e.units;
units.forEach( u => contractsArray.push(u.contracts));
});
如果要获得所有合同,请使用lodash:
_.map(realty.entrances, e => e.units.map(u => u.contracts));