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Kuidas erinevad teabe saamise viisid nimekirjast ja sõnastikust programmeerimiskeeles?
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In C#, extracting information from a list (List<T>) and a dictionary (Dictionary<TKey, TValue>) differs in the access method:
-
List (List<T>): elements are accessible by index, for example
list[0]. It is an ordered collection where the order of elements matters. -
Dictionary (Dictionary<TKey, TValue>): elements are accessible by key, for example
dictionary[key]. It is an unordered collection of key-value pairs, where the key is unique.
Example:
List<string> list = new List<string> { "apple", "banana" };
string firstItem = list[0]; // "apple"
Dictionary<int, string> dict = new Dictionary<int, string> { {1, "one"}, {2, "two"} };
string value = dict[1]; // "one"
Therefore, the list is convenient for sequential access by position, and the dictionary — for quick access by a unique key.