更新时间:2023-02-23 08:00:57
你绝对可以使用 reduceRight
为此。问题是您创建了一个字符串,但是您需要将对象作为 initialValue
传递并使用方括号括号:
var obj = {type:Purchase,category:Apartment,categoryOptions:{apartment :{floor:{type:number,value:null,placeholder:Total Floors}}}} var keysArray = [value,floors,apartment, categoryOptions] var value = keysArray.reduceRight((r,e)=> r [e] || r,obj)console.log(value)
How can I get a value from a nested object, using an array of keys?
// my sample object
var obj = {
type : "Purchase",
category : "Apartment",
categoryOptions : {
apartment : {
floors : {
type : "number",
value : null,
placeholder : "Total Floors"
},
},
},
}
var keysArray = ["value", "floors", "apartment", "categoryOptions"]
I tried to use array.reduceRight to achieve this but could not make it work.
here is what I've tried :
var roadToValue = keysArray.reduceRight(
function(previousValue, currentValue){
return previousValue + "[" + currentValue + "]" ;
}
);
// above function results in a single string like
// "categoryOptions[apartment][floors][value]"
// which off-course can't be used as object key
// and obj[roadToValue] results in 'undefined'
is there any way so I can get the proper key to pass to obj here?
You definitely can use reduceRight
for this. The problem is that you created a string, however you need to pass your object as initialValue
and use the squared bracket notation:
var obj = {"type":"Purchase","category":"Apartment","categoryOptions":{"apartment":{"floors":{"type":"number","value":null,"placeholder":"Total Floors"}}}}
var keysArray = ["value", "floors", "apartment", "categoryOptions"]
var value = keysArray.reduceRight((r, e) => r[e] || r, obj)
console.log(value)