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I have seen the Tuple introduced in .Net 4 but I am not able to imagine where it can be used. We can always make a Custom class or Struct.
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A tuple allows you to combine multiple values of possibly different types into a single object without having to create a custom class. This can be useful if you want to write a method that for example returns three related values but you don't want to create a new class. We can create a Tuple using the Create method.
Tuple is a great option when you want to combine multiple values (can be different types) into one object without creating a custom class. In this case, Tuple would be a fast and a perfect option to go with.
A tuple is a data structure that has a specific number and sequence of elements.
In C#, a 3-tuple is a tuple that contains three elements and it is also known as triple. You can create a 3-tuple using two different ways: Using Tuple<T1,T2,T3>(T1, T2, T3) Constructor. Using the Create method.
That's the point - it is more convenient not to make a custom class or struct all the time. It is an improvement like Action or Func... you can make this types yourself, but it's convenient that they exist in the framework.
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With tuples you could easily implement a two-dimensional dictionary (or n-dimensional for that matter). For example, you could use such a dictionary to implement a currency exchange mapping:
var forex = new Dictionary<Tuple<string, string>, decimal>(); forex.Add(Tuple.Create("USD", "EUR"), 0.74850m); // 1 USD = 0.74850 EUR forex.Add(Tuple.Create("USD", "GBP"), 0.64128m); forex.Add(Tuple.Create("EUR", "USD"), 1.33635m); forex.Add(Tuple.Create("EUR", "GBP"), 0.85677m); forex.Add(Tuple.Create("GBP", "USD"), 1.55938m); forex.Add(Tuple.Create("GBP", "EUR"), 1.16717m); forex.Add(Tuple.Create("USD", "USD"), 1.00000m); forex.Add(Tuple.Create("EUR", "EUR"), 1.00000m); forex.Add(Tuple.Create("GBP", "GBP"), 1.00000m); decimal result; result = 35.0m * forex[Tuple.Create("USD", "EUR")]; // USD 35.00 = EUR 26.20 result = 35.0m * forex[Tuple.Create("EUR", "GBP")]; // EUR 35.00 = GBP 29.99 result = 35.0m * forex[Tuple.Create("GBP", "USD")]; // GBP 35.00 = USD 54.58 If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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