合并node.js中的对象

Question

我有一些对象试图在Node.js中将它们合并在一起，第一个对象的格式如下

{ ids : [id, id, id, ....]}

其余对象的格式如下

{ postcode: '' , lat: '', lon: ''}, {postcode: '' , lat: '', lon: ''},....

我需要以类似于此格式的方式合并它们

{ id: '', postcode: '', lat: '', lon:''}

我想知道是否可以在nodejs中做到这一点？

Answer 1

ECMAScript 2015（ES6）标准方法

Object.assign(obj1, obj2);

Answer 2

使用功能forEach 。

假设对象都在同一数组中。

 var array = [{ ids : ['5a6df69d84a1d08d9104c0b2', '5a6df69d84a1d08d9104c0b3', '5a6df69d84a1d08d9104c0b4']}, { postcode: 'BL9 9LS', lat: 53.5784531917354, lon: -2.30434868940289, admin_ward: 'E05000682' }, { postcode: 'SK3 0RH', lat: 53.4003081612165, lon: -2.19362957330647, admin_ward: 'E05000788' }, { postcode: 'BS1 5BQ', lat: 51.4564431573373, lon: -2.59829088044349, admin_ward: 'E05010892' }]; var result = array.slice(-(array.length - 1)); // Create a new Array removing the first position. result.forEach((e, i) => e['id'] = array[0].ids[i] /* Add id from the first element*/); console.log(result); 

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分开的物体

此方法修改了源数组。

 var firstObject = { ids : ['5a6df69d84a1d08d9104c0b2', '5a6df69d84a1d08d9104c0b3', '5a6df69d84a1d08d9104c0b4']}; var array = [{ postcode: 'BL9 9LS', lat: 53.5784531917354, lon: -2.30434868940289, admin_ward: 'E05000682' }, { postcode: 'SK3 0RH', lat: 53.4003081612165, lon: -2.19362957330647, admin_ward: 'E05000788' }, { postcode: 'BS1 5BQ', lat: 51.4564431573373, lon: -2.59829088044349, admin_ward: 'E05010892' }]; array.forEach((e, i) => e['id'] = firstObject.ids[i]); console.log(array); 

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使用功能map 。

假设对象都在同一数组中。

 var array = [{ ids : ['5a6df69d84a1d08d9104c0b2', '5a6df69d84a1d08d9104c0b3', '5a6df69d84a1d08d9104c0b4']}, { postcode: 'BL9 9LS', lat: 53.5784531917354, lon: -2.30434868940289, admin_ward: 'E05000682' }, { postcode: 'SK3 0RH', lat: 53.4003081612165, lon: -2.19362957330647, admin_ward: 'E05000788' }, { postcode: 'BS1 5BQ', lat: 51.4564431573373, lon: -2.59829088044349, admin_ward: 'E05010892' }]; var result = array.slice(-(array.length - 1)); // Create a new Array removing the first position. result = result.map((e, i) => ({ ...e, ...{'id': array[0].ids[i] } }) /* Add id from the first element*/); console.log(result); 

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分开的物体

 var firstObject = { ids : ['5a6df69d84a1d08d9104c0b2', '5a6df69d84a1d08d9104c0b3', '5a6df69d84a1d08d9104c0b4']}; var array = [{ postcode: 'BL9 9LS', lat: 53.5784531917354, lon: -2.30434868940289, admin_ward: 'E05000682' }, { postcode: 'SK3 0RH', lat: 53.4003081612165, lon: -2.19362957330647, admin_ward: 'E05000788' }, { postcode: 'BS1 5BQ', lat: 51.4564431573373, lon: -2.59829088044349, admin_ward: 'E05010892' }]; var result = array.map((e, i) => ({ ...e, ...{ 'id': firstObject.ids[i] } })); console.log(result); 

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Answer 3

尝试这个。 Object.assign会改变您的对象。

let idsObj = { ids : [id, id, id, ....]};

let postCodeArray = [{ postcode: '' , lat: '', lon: ''}, {postcode: '' , lat: '', lon: ''}];

postCodeArray.forEach((elem,index) => Object.assign(elem,{id: idsObj.ids[index]}));

Answer 4

您可以在对象前面加上id 。

 var object1 = { ids: [23, 42] }, postcodes = [{ postcode: 'XY' , lat: '11', lon: '22' }, { postcode: 'ZY' , lat: '33', lon: '44'}], merged = postcodes.map((o, i) => Object.assign({ id: object1.ids[i] }, o)); console.log(merged);