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Example demonstrates working and syntax of Slices in Go along with usage of append & copy functions. Click here to learn more
import "fmt"
func main() {
//Creating Slice of length 5
sliceA := make([]int, 5)
sliceA[0] = 1
sliceA[1] = 2
sliceA[2] = 3
print(sliceA, "sliceA")
//Creating Slice of length 2 which is backed by array of length 5
sliceB := make([]int, 2, 5)
sliceB[0] = 1
sliceB[1] = 2
print(sliceB, "sliceB")
//Creating Slice along with providing values to it
slice := []int{1, 2}
print(slice, "slice")
//Creating Slice with low & high expressions
array := [9]int{
1, 2, 3,
4, 5, 6,
7, 8, 9,
}
//[low:high], Where low is the index where to start &
//high is the index where to end but not including
//the index itself
sliceC := array[1:4]
print(sliceC, "sliceC")
//[:high]
sliceD := array[:5]
print(sliceD, "sliceD")
//[low:]
sliceE := array[0:]
print(sliceE, "sliceE")
//[:]
sliceF := array[:]
print(sliceF, "sliceF")
//Append function
appendedSlice := append(sliceF, 10, 11)
print(appendedSlice, "appendedSlice")
//Copy (Destination, Source) function
arrayX := [6]int{
1, 2,
3, 4,
5, 6,
}
sliceX := arrayX[:2]
print(sliceX, "sliceX")
sliceY := arrayX[2:5]
print(sliceY, "sliceY")
copiedValuesCount := copy(sliceX, sliceY)
fmt.Printf("Number of values copied is %d", copiedValuesCount)
fmt.Println()
print(sliceX, "sliceX")
}
func print(arr []int, arrName string) {
fmt.Printf("Value of Slice '%s' with length %d is %d",
arrName, len(arr), arr)
fmt.Println()
}
Value of Slice 'sliceA' with length 5 is [1 2 3 0 0]
Value of Slice 'sliceB' with length 2 is [1 2]
Value of Slice 'slice' with length 2 is [1 2]
Value of Slice 'sliceC' with length 3 is [2 3 4]
Value of Slice 'sliceD' with length 5 is [1 2 3 4 5]
Value of Slice 'sliceE' with length 9 is [1 2 3 4 5 6 7 8 9]
Value of Slice 'sliceF' with length 9 is [1 2 3 4 5 6 7 8 9]
Value of Slice 'appendedSlice' with length 11 is [1 2 3 4 5 6 7 8 9 10 11]
Value of Slice 'sliceX' with length 2 is [1 2]
Value of Slice 'sliceY' with length 3 is [3 4 5]
Number of values copied is 2
Value of Slice 'sliceX' with length 2 is [3 4]
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