Golang : Populate slice with sequential integers example
Helping out a friend here, putting the code example down here for future references. Basically, he needs to generate a slice with sequential integers such as [1,2,3,4,5]
and also need to generate slice that have negative numbers such as [2,1,0,-1,-2,-3,-4,-5]
.
The code that follows is self-explanatory. Here you go!
package main
import (
"fmt"
)
func sequentialInt(start, end int) []int {
var size int
// check if end > start
if end > start {
size = end - start
size = size + 1 // because counting starts from 0
intSlice := make([]int, size)
for i := 0; i < len(intSlice); i++ {
intSlice[i] = start + i
}
return intSlice
} else {
size = start - end
size = size + 1 // plus 1 because counting starts from 0
intSlice := make([]int, size)
for i := 0; i < len(intSlice); i++ {
intSlice[i] = start - i
}
return intSlice
}
}
func main() {
numbers := sequentialInt(0, 10)
fmt.Println(numbers)
numbers2 := sequentialInt(-10, 5)
fmt.Println(numbers2)
// test for reverse order
numbers3 := sequentialInt(9, -11)
fmt.Println(numbers3)
}
Output:
[0 1 2 3 4 5 6 7 8 9 10]
[-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5]
[9 8 7 6 5 4 3 2 1 0 -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11]
Happy coding!
References:
https://www.socketloop.com/tutorials/golang-generate-random-integer-or-float-number
See also : Golang : Generate random string
By Adam Ng
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