Tuples & deconstruction in C#

Group values without a class, pull them apart, and swap in one line.

var point = (X: 3.0, Y: 4.0);
Console.WriteLine($"x={point.X}, y={point.Y}");

// deconstruct into locals, or swap two values without a temp
var (min, max) = (10, 5);
(min, max) = (max, min);
Console.WriteLine($"min {min}, max {max}");

(string name, int age) person = ("Ada", 36);
Console.WriteLine($"{person.name} is {person.age}");

How it works

1. (X: 3.0, Y: 4.0) builds a tuple with named elements.
2. var (min, max) deconstructs a tuple into fresh locals.
3. Assigning (max, min) swaps the pair without a temporary.

Keywords and builtins used here

• int
• string
• var

The run, in numbers

Lines

10

Characters to type

334

Tokens

75

Three-star pace

90 tpm

At the three-star pace of 90 tokens a minute, this run takes about 50 seconds.

Type this snippet

Step 3 of 3 in Variables & types, step 3 of 29 in Language basics.

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