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// +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
}
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