Safely access value from a nested object

nestedObjValue.js

//Param1: Nested Object
//Param2: Array of keys in the desired order 
//Return: Final value from given object based on the given key order if exists, else undefined

function nestedObjValue(obj, keyOrder){
    return keyOrder.reduce((a,b) => typeof a !== 'object' || !a ? undefined : a[b] , obj)
}

//Examples
nestedObjValue({a: {b: {c : {d: {e: 3}}}}}, ['a','b', 'c', 'd', 'e']) //3
nestedObjValue({a: {b: {c : {d: {e: 3}}}}}, ['a','b', 'c', 'f', 'g']) //undefined
nestedObjValue({a: {b: {c : {d: {e: [{a: 3}, {b: 4}]}}}}}, ['a','b', 'c', 'd', 'e', 1, 'b']) //4
nestedObjValue({a: {b: {c : {d: {e: [{a: 3}, {b: 4}]}}}}}, ['a','b', 'c', 'd', 'e', 0, 'b']) //undefined

Nice example man. I have been trying to do the same and your help came at the right moment

Just check null condition to make this function more versatile and robust. Good one Ashish !

@cw-patiltejashree gist updated, thanks for the suggestion.

@balsikandar glad it helped.