github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/blog/content/slices/prog030.go (about)

     1  // +build OMIT
     2  
     3  // Copyright 2013 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  package main
     8  
     9  import (
    10  	"fmt"
    11  )
    12  
    13  var buffer [256]byte
    14  var slice []byte = buffer[100:150]
    15  
    16  func PtrSubtractOneFromLength(slicePtr *[]byte) {
    17  	slice := *slicePtr
    18  	*slicePtr = slice[0 : len(slice)-1]
    19  }
    20  
    21  func main() {
    22  	fmt.Println("Before: len(slice) =", len(slice))
    23  	PtrSubtractOneFromLength(&slice)
    24  	fmt.Println("After:  len(slice) =", len(slice))
    25  }