How to update a value in a nested dictionary given path fragment in Swift?

Question

I have a nested dictionary and an array containing path fragment. I need to update the value at that location.

I am possibly looking for a recursive function instead of

Answer 1

This is not what you asked, but the entire premise here is unSwifty. The use of [String:Any] is a Bad Smell. It seems more like Objective-C. And indeed this whole thing is a one-liner in Objective-C:

NSMutableDictionary * d1 = [[NSMutableDictionary alloc] initWithDictionary: @{ @"title" : @1111 }];
NSMutableDictionary * d2 = [[NSMutableDictionary alloc] initWithDictionary: @{ @"item" : d1 }];
NSMutableDictionary * d3 = [[NSMutableDictionary alloc] initWithDictionary: @{ @"channel" : d2 }];

Okay, that was just to prepare the data. Here’s the one-liner:

[d3 setValue:@123 forKeyPath:@"channel.item.title"];

But I would question the entire nested dictionaries concept; it seems to me you’ve gone down a wrong well here and you need to stand back and rethink your data structure.