What and When to use Tuple

Question

May someone please explain what a Tuple is and how to use it in a Real World Scenario  I would like to find out how this can enrich my coding experience

User · Answer

The difference between a tuple and a class is that a tuple has no property names  This is almost never a good thing  and I would only use a tuple when the arguments are fairly meaningless like in an abstract math formula Eg  abstract calculus over 5 6 7 dimensions might take a tuple for the coordinates

User · Answer

Tuple classes allow developers to be  quick and lazy  by not defining a specific class for a  specific use    The property names are Item1  Item2  Item3      which may not be meaningful in some cases or without documentation   Tuple classes have strongly typed generic parameters  Still users of the Tuple classes may infer from the type of generic parameters

User · Answer

This msdn article explains it very well with examples   A tuple is a data structure that has a specific number and sequence of elements       Tuples are commonly used in four ways          To represent a single set of data  For example  a tuple can   represent a database record  and its components can represent   individual fields of the record    To provide easy access to  and manipulation of  a data set    To return multiple values from a method without using out parameters    in C   or ByRef parameters  in Visual Basic     To pass multiple values to a method through a single parameter  For   example  the Thread Start Object  method has a single parameter that   lets you supply one value to the method that the thread executes at   startup time  If you supply a Tuple lt T1  T2  T3 gt  object as the method   argument  you can supply the thread   s startup routine with three   items of data

User · Answer

This is the most important thing to know about the Tuple type  Tuple is a class  not a struct  It thus will be allocated upon the managed heap  Each class instance that is allocated adds to the burden of garbage collection   Note  The properties Item1  Item2  and further do not have setters  You cannot assign them  The Tuple is immutable once created in memory

User · Answer

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   Usually though you should create a class as this allows you to give useful names to each property  Code that extensively uses tuples will quickly become unreadable because the properties are called Item1  Item2  Item3  etc

[c#] What and When to use Tuple?

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