Update dictionary values in nested dictionary - swift

Question

The nested dictionary that I am using is build like this
var fDict : [String : Any] = [:]
var errors : [String : Any] = [:]
var error : [String : Any] = [:]
let base : [String : Any] = ["key": "123"]
error["error"] = base
errors["errors"] = error
fDict["profile-response"] = errors
The dictionary is looking like :
{
“profile-response“ : {
“errors” : {
“error” : {
“key“ = “123”
}
}
}
}
I have written code to update the value of key to "abc"
Code :
func replaceErrorWithCustomError( data : inout [String: Any]) {
for (key,value) in data {
if key == "key" {
data.updateValue("abc", forKey: key)
break
} else if var value = value as? [String: Any] {
replaceErrorWithCustomError(data: &value)
}
}
}
The result before update and after update remains same. Please suggest how to make changes in the current dictionary without taking another dictionary.

Answer 1

You can try this -
func replaceErrorWithCustomError(data: inout [String: Any]) {
func updateError(dict: inout [String: Any]) -> [String: Any] {
for (key, value) in dict {
if key == "key" {
dict.updateValue("abc", forKey: key)
break
} else if var value = value as? [String: Any] {
// This is the key change
// Result must be updated back into parent
dict[key] = updateError(dict: &value)
}
}
return dict
}
updateError(dict: &data)
}