tframe-utility/preObject/index.js

minimal unit of smpoo tframe platform

// 对象深拷贝
let deepCopy = (obj) => {
  let o = obj instanceof Array ? [] : {};
  for (let k in obj) {
    let val = obj[k];
    if (typeof val === "object") {
      o[k] = deepCopy(val);
    } else {
      o[k] = val;
    }
  }
  return o;
};

/* 获取 JS 对象类型
*  @obj：要判断类型的值
*/
let getJsObjectType = obj => {
  let str = typeof obj;
  if (str === 'object') {
    if (Array.isArray(obj)) {
      str = 'array';
    } else if (obj instanceof Date) {
      str = 'date';
    } else {
      str = 'object';
    }
  }
  return str;
};

/* 
*  在目标数组的指定位置之后进行插入
*  @toArr：要被插入元素的目标数组
*  @fromObj：要插入目标数组的数组或对象
*  @index：目标数组即将被插入的索引位置，起始于0
*  @reserve：是否保留原目标数组不变
*/
let arrInsert = (toArr, from, index, reserve = false) => {
  let _arrTaget = [];
  if (reserve) {
    let [...toArrNew] = toArr;
    _arrTaget = toArrNew;
  } else {
    _arrTaget = toArr;
  }
  let _isArr = Array.isArray(from);
  let _arr1 = _arrTaget.splice(0, index + 1);
  if (_isArr) {
    return [..._arr1, ...from, ..._arrTaget];
  } else {
    return [..._arr1, from, ..._arrTaget];
  }
};

module.exports = {
  deepCopy,
  getJsObjectType,
  arrInsert
};