accessing dictionary data is not consistent

A dictionary is an associative array.  Key, value pairs. You are using the [key] notation to retrieve the value which is fine. But I’d expect if you decide to use the array notation and use numeric keys then you’ll see what you’re seeing.  Have you tried using Monkey types to see if it changes the behaviour!

A dictionary is an associative array.  Key, value pairs. You are using the [key] notation to retrieve the value which is fine. But I’d expect if you decide to use the array notation and use numeric keys then you’ll see what you’re seeing.  Have you tried using Monkey types to see if it changes the behaviour!

Indeed because it’s an associative array

You could basically consider it an array of keys and an array of values.  Search for key in first array, then use matching index in second array to pull up the value for that key.

and you can see using [] is allowed to dictionary

Exception: UnexpectedTypeException: Expected Object/Array/Dictionary/ByteArray, given String

d[key] should be equivalent to d.get(key), if not, it should be forbidden

string has probably also associative array of chars but