Odin by Example: Slice

Slices provide a view into an array. Unlike arrays, slices do not own their data and their size is not part of their type.

A slice is created by slicing an array or by using a slice literal. Multiple slices can refer to the same underlying array.

The built-in len procedure returns the number of elements in a slice.

$ odin run slices.odin -file
[2 3 4]
first: 2
len: 3
[1 20 3 4 5]

package main

import "core:fmt"

main :: proc() {
	// Create an array.
	numbers := [5]int{1, 2, 3, 4, 5}

	// Create a slice that refers to part of the array.
	s := numbers[1:4]

	fmt.println(s)

	// Access elements by index.
	fmt.println("first:", s[0])

	// len returns the number of elements.
	fmt.println("len:", len(s))

	// Modifying a slice also modifies the
	// underlying array.
	s[1] = 20

	fmt.println(numbers)
}

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