Lodash向对象添加属性的方式

Question

I have an object

{ id1: {name: 'John'}, id2: {name: 'Mary'} }

I need to assign a property to each person. I need to achieve this

{ id1: {name: 'John', married: false}, id2: {name: 'Mary', married: false} }

I can do it by forEach over the _.values but it doesn't seem like the best way. Is there a LoDash way to do this

Answer 1

use _.mapValues

var res = _.mapValues(data, function(val, key) {
    val.married = false;
    return val;
})

to prevent the mutation of the original data

var res = _.mapValues(data, function(val, key) {
    return _.merge({}, val, {married: false});
})

to mutate in place

_.mapValues(data, function(val, key) {
    val.married = false;
})

Answer 2

ES6 version, probably also the fastest...?

 var obj = { id1: {name: 'John'}, id2: {name: 'Mary'} } for (let [key, val] of Object.entries(obj)) val.married = false console.log(obj)

Answer 3

Use _.mapValues,

    let rows = { id1: {name: 'John'}, id2: {name: 'Mary'} };

    _.mapValues(rows, (value, key) => {
        value.married = false;
    });

Output:-

{id1: {name: "John", married: false}, id2: {name: "Mary", married: false}}