递归实现驼峰下划线相互转换，支持多层嵌套对象

Posted 2021-09-13 phoenixhg

/**
 * 数据对象key 驼峰下划线相互转化
 * @param {Object} data - 原始对象 支持-数组、key-value对象、字符串
 * @param {String} type hump-转驼峰 toLine-转下划线
 */
formatHumpLineTransfer (data, type = \'hump\') {
  let hump = \'\'
  // 转换对象中的每一个键值为驼峰的递归
  let formatTransferKey = (data) => {
    if (data instanceof Array) {
      data.forEach(item => formatTransferKey(item))
    } else if (data instanceof Object) {
      for (let key in data) {
        hump = type === \'hump\' ? this.formatToHump(key) : this.formatToLine(key)
        data[hump] = data[key]
        if (key !== hump) {
          delete data[key]
        }
        if (data[hump] instanceof Object) {
          formatTransferKey(data[hump])
        }
      }
    } else if (typeof data === \'string\') {
      data = type === \'hump\' ? this.formatToHump(data) : this.formatToLine(data)
    }
  }
  formatTransferKey(data)
  return data
}

/**
 * 字符串下划线转驼峰
 * @param {String} value 需要转换的值
 */
formatToHump(value) {
  return value.replace(/\\_(\\w)/g, (_, letter) => letter.toUpperCase())
}

/**
 * 字符串驼峰转下划线
 * @param {String} value 
 */
formatToLine(value) {
  return value.replace(/([A-Z])/g,"_$1").toLowerCase()
}