value.js
2.36 KB
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/**
* 通过路径获取值
* @param {Object} obj
* @param {String} path
* @param {Number} subIndex
* @returns
*/
export const getValueByPath = (obj, path, subIndex) => {
if (!obj || !path || path.constructor != String) {
return null
}
if (!/^\w?.*[\w|\]]$/.test(path)) {
return null
}
let pathAry = path.split('.')
if (pathAry.length == 1) {
return obj[path]
} else if (pathAry.length > 1) {
let ret = obj
for (var i = 0; i < pathAry.length; i++) {
const key = pathAry[i]
const match = /^(\w+)\[(\d+)\]$/.exec(key)
if (match) {
ret = ret[match[1]][match[2]]
} else if (ret && ret.constructor === Array) {
let index = 0
if (subIndex != null && subIndex != undefined) {
let preIndex = Number.parseInt(subIndex)
if (!isNaN(preIndex)) {
index = preIndex
}
}
ret = ret[index][key]
} else {
if (ret && ret[key]) {
ret = ret[key]
} else {
ret = null
}
}
}
return ret
}
return null
}
/**
* 通过路径设置对象中的属性
* @param {Object} obj
* @param {String} path
* @param {Any} value
* @param {Number} subIndex
* @returns
*/
export const setValueByPath = (obj, path, value, subIndex) => {
if (!obj || !path || path.constructor != String) {
return
}
if (!/^\w?.*[\w|\]]$/.test(path)) {
return
}
let pathAry = path.split('.')
if (pathAry.length == 1) {
obj[path] = value
} else if (pathAry.length > 1) {
let ret = obj
for (var i = 0; i < pathAry.length; i++) {
const key = pathAry[i]
const match = /^(\w+)\[(\d+)\]$/.exec(key)
if (i == pathAry.length - 1) {
if (match) {
ret[match[1]][match[2]] = value
} else if (ret && ret.constructor === Array) {
let index = 0
if (subIndex != null && subIndex != undefined) {
let preIndex = Number.parseInt(subIndex)
if (!isNaN(preIndex)) {
index = preIndex
}
}
ret[index][key] = value
} else {
if (ret && ret[key] !== undefined) {
ret[key] = value
} else {
ret = null
}
}
} else {
if (match) {
ret = ret[match[1]][match[2]]
} else {
ret = ret[key]
}
}
}
}
}