如何通过给定的对象访问路径，获取javascript对象的某个属性的值?

Question

const people = {
 base: {
   name: 'zhang san',
   age: 25,
   clothes: [
     { name: 'jack', color: 'red' },
     { name: 'suit', color: 'black' }
   ]
 },
 children: [
   { name: 'son1', gender: 'male', age: 3 },
   { name: 'girl1', gender: 'female', age: 1 }
 ]
}
function getObjectByPath (obj, path) {
 // return result
}
console.log(getObjectByPath(people, 'base.age')) // 25
console.log(getObjectByPath(people, 'base.clothes[0].name')) // jack
console.log(getObjectByPath(people, 'children[0].name')) // son1

Answer 1

Lodash get方法

Answer 2

刚刚自己写了一个，不知道有没有更好方法

const people = {
 base: {
 name: 'zhang san',
 age: 25,
 clothes: [
 { name: 'jack', color: 'red' },
 { name: 'suit', color: 'black' }
 ] }, children: [
 { name: 'son1', gender: 'male', age: 3 },
 { name: 'girl1', gender: 'female', age: 1 }
 ]}
function getObjectByPath (obj, path) {
 path = path.split('.')
 path.forEach(p => {
   let reg = /[(d+)]/
   obj = reg.test(p) ? obj[p.replace(reg, '')][RegExp.$1] : obj[p]
 })
 return obj
}
console.log(getObjectByPath(people, 'base.age')) // 25
console.log(getObjectByPath(people, 'base.clothes[0].name')) // jack
console.log(getObjectByPath(people, 'children[0].name')) // son1
console.log(getObjectByPath(people, 'children[0]')) // { name: 'son1', gender: 'male', age: 3 }