SOURCE

 var stooges = [
  {
    labe:1,
    value:1,
    placeCode:'sz'
  },
  {
    labe:1,
    value:1,
    placeCode:'sh'
  }
 , 
  {
    labe:1,
    value:1,
    placeCode:'sh'
  }
]
//console.log(stooges)
var maps = new Map([['sh','沪'],['sz','深']]);
maps.forEach((c,key)=>{
    console.log(key)
})
stooges = stooges.map(e=>{
  e.placeCode = maps.get(e.placeCode);
  //console.log(e)
  return e;
})
console.log(stooges)