Example for splitting a slice of any type into batches with predefined sizes. The size of the last slice will be adjustes to the left over elements.

split-into-batches.go

func SplitIntoBatches[T any](slice []T, batchSize int) [][]T {
	var batches = make([][]T, 0)
	var limit = len(slice) - 1

	for i := 0; i < len(slice); i += batchSize {
		var start = i
		var end = i + batchSize

		if end > limit {
			batches = append(batches, slice[start:limit+1])
		} else {
			batches = append(batches, slice[start:end])
		}
	}

	return batches
}