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  1. package main
  2. import "fmt"
  3.  
  4. func main(){
  5.     original := make([]int, 0, 5)
  6.     fmt.Println("orig cap:", cap(original)) // 5
  7.     fmt.Println("orig len:", len(original)) // 0
  8.  
  9.     original = append(original, 0)
  10.     original = append(original, 1)
  11.     original = append(original, 2)
  12.     fmt.Println("orig cap:", cap(original)) // 5
  13.     fmt.Println("orig len:", len(original)) // 3
  14.  
  15.     slice := original[1:]
  16.     fmt.Println("slice cap:", cap(slice)) // 4
  17.     fmt.Println("slice len:", len(slice)) // 2
  18.     original[0]++
  19.     slice[0]++
  20.     slice[1]++
  21.     fmt.Println("orig:", original) // [1, 2, 3]
  22.  
  23.     slice = append(slice, 4)
  24.     fmt.Println("orig cap:", cap(original)) // 
  25.     fmt.Println("orig len:", len(original)) // 
  26.     fmt.Println("slice cap:", cap(slice)) // 
  27.     fmt.Println("slice len:", len(slice)) // 
  28.     fmt.Println("slice:", slice) // [, , ]
  29.  
  30.     original = append(original, -1)
  31.     fmt.Println("orig:", original) // [, , ]
  32.     fmt.Println("slice:", slice) // [, , ]
  33. }
Success #stdin #stdout 0s 420672KB
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stdin
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Standard input is empty
stdout
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orig cap: 5
orig len: 0
orig cap: 5
orig len: 3
slice cap: 4
slice len: 2
orig: [1 2 3]
orig cap: 5
orig len: 3
slice cap: 4
slice len: 3
slice: [2 3 4]
orig: [1 2 3 -1]
slice: [2 3 -1]
https://ideone.com/qGSArp
language:
Go (go 1.12.1)
created:
10 years ago
visibility:
public

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