Tuples

A tuple is a collection of values of different types. Tuples are constructed using parentheses (), and each tuple itself is a value with type signature (T1, T2, ...), where T1, T2 are the types of its members. Functions can use tuples to return multiple values, as tuples can hold any number of values.

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Activity

1. Recap: Add the fmt::Display trait to the Matrix struct in the above example, so that if you switch from printing the debug format {:?} to the display format {}, you see the following output:

   ( 1.1 1.2 )
   ( 2.1 2.2 )
   

   You may want to refer back to the example for print display.

2. Add a transpose function using the reverse function as a template, which accepts a matrix as an argument, and returns a matrix in which two elements have been swapped. For example:

   println!("Matrix:\n{}", matrix);
   println!("Transpose:\n{}", transpose(matrix));
   

   results in the output:

   Matrix:
   ( 1.1 1.2 )
   ( 2.1 2.2 )
   Transpose:
   ( 1.1 2.1 )
   ( 1.2 2.2 )