| // +build OMIT |
| |
| // Copyright 2013 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package main |
| |
| import ( |
| "fmt" |
| ) |
| |
| // Append appends the elements to the slice. |
| // Efficient version. |
| func Append(slice []int, elements ...int) []int { |
| n := len(slice) |
| total := len(slice) + len(elements) |
| if total > cap(slice) { |
| // Reallocate. Grow to 1.5 times the new size, so we can still grow. |
| newSize := total*3/2 + 1 |
| newSlice := make([]int, total, newSize) |
| copy(newSlice, slice) |
| slice = newSlice |
| } |
| slice = slice[:total] |
| copy(slice[n:], elements) |
| return slice |
| } |
| |
| func main() { |
| // START OMIT |
| slice1 := []int{0, 1, 2, 3, 4} |
| slice2 := []int{55, 66, 77} |
| fmt.Println(slice1) |
| slice1 = Append(slice1, slice2...) // The '...' is essential! |
| fmt.Println(slice1) |
| // END OMIT |
| } |
