var obj ={
aaa:123,
bbb:'uuu',
ggg:'rrr'
}
objMap = (obj,fn)=>{
if(typeof fn!=='function'){
throw new Error('fn不是一个函数')
}
return JSON.parse(JSON.stringify(obj,fn))
}
objMap(obj,(key,value)=>{
if(typeof value =='number'){
return value*2
}else{
return value
}
})