Meet the Slice!

slices.go

// Some numbers, please!
numbers := []int{1, 2, 3, 4, 5}

log(numbers)         // 1. [1 2 3 4 5]
log(numbers[2:])     // 2. [3 4 5]
log(numbers[1:3])    // 3. [2 3]

// Fun fact: you can’t use negative indices!
//
// numbers[:-1] from Python won’t work. Instead,
// you are supposed to do this:
//
log(numbers[:len(numbers)-1])    // 4. [1 2 3 4]

// “Terrific” readability, Mr. Pike! Well done!
//
// Now let’s say, I want to append six:
//
numbers = append(numbers, 6)

log(numbers) // 5. [1 2 3 4 5 6]

// Remove number 3 from numbers:
//
numbers = append(numbers[:2], numbers[3:]...)

log(numbers)    // 6. [1 2 4 5 6]

// Wanna insert some number? Don’t worry, there is
// a *common* best practice in Go!
//
// I particularly love the ... thing, haha.
//
numbers = append(numbers[:2], append([]int{3}, numbers[2:]...)...)

log(numbers)    // 7. [1 2 3 4 5 6]

// In order to copy a slice, here is what you do:
//
copiedNumbers := make([]int, len(numbers))
copy(copiedNumbers, numbers)

log(copiedNumbers)    // 8. [1 2 3 4 5 6]

// And there’s more.