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Go functions make, slice, append

2022-07-02 07:56:00 【kq1983】

make

       
        //  Length and capacity are 5 Elements 
        
  array := make([]string,5)
        

        
  for i:=0;i<len(array);i++ {
        
    array[i] = strconv.Itoa(i) // int to string
        
    fmt.Printf("%d=%s \n",i,array[i])
        
  }
        

        
  fmt.Println()
        
  // The length is 3 individual    Capacity of 5 individual 
        
  array1 := make([]string,3,5)
        
  for i:=0;i<len(array1);i++ { // You can visit 3 Elements 
        
    array1[i] = strconv.Itoa(i) // int to string
        
    fmt.Printf("%d=%s \n",i,array1[i])
        
  }
       
       
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Print

slice

[start:end]

       
        slice := [] int {1,2,3,4,5,6,7,8,9}
        

        
  slice1 := slice[2:5]
        
  fmt.Printf("\n")
        
  fmt.Printf("slice1.length=%d \n",len(slice1))
        
  for i:=0;i<len(slice1);i++ {
        
    fmt.Printf("%d=%d \n",i,slice1[i])
        
  }
       
       
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Output

       
        slice1.length=3 
        
0=3 
        
1=4 
        
2=5
       
       
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[i:j:k]

The length is j-i , Capacity of k-1

append

       
        slice := [] int {1,2,3,4,5,6,7,8,9}
        
    fmt.Printf("start myappend =============================\n")
        
    // 3,4,5
        
    slice1 := slice[2:5]
        
    fmt.Printf("\n")
        
    fmt.Printf("slice1.length=%d \n",len(slice1))
        
    for i:=0;i<len(slice1);i++ {
        
        fmt.Printf("%d=%d \n",i,slice1[i])
        
    }
        
    // 6  become 10  7 Turned into 11
        
    slice1 = append(slice1,10,11)
        
    fmt.Printf("\n")
        

        
    fmt.Printf("slice.length=%d \n",len(slice))
        
    for i:=0;i<len(slice);i++ {
        
        fmt.Printf("%d=%d \n",i,slice[i])
        
    }
        
    fmt.Printf("\n")
        
    fmt.Printf("slice1.length=%d \n",len(slice1))
        
    for i:=0;i<len(slice1);i++ {
        
        fmt.Printf("%d=%d \n",i,slice1[i])
        
    }
       
       
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Output

       
        start myappend =============================
        

        
slice1.length=3 
        
0=3 
        
1=4 
        
2=5 
        

        
slice.length=9 
        
0=1 
        
1=2 
        
2=3 
        
3=4 
        
4=5 
        
5=10 
        
6=11 
        
7=8 
        
8=9 
        

        
slice1.length=5 
        
0=3 
        
1=4 
        
2=5 
        
3=10 
        
4=11
       
       
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