30 lines
453 B
Go
30 lines
453 B
Go
package main
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"log"
|
|
)
|
|
|
|
var (
|
|
v1 = []int{1, 3, -5}
|
|
v2 = []int{4, -2, -1}
|
|
)
|
|
|
|
func dot(x, y []int) (r int, err error) {
|
|
if len(x) != len(y) {
|
|
return 0, errors.New("incompatible lengths")
|
|
}
|
|
for i, xi := range x {
|
|
r += xi * y[i]
|
|
}
|
|
return
|
|
}
|
|
|
|
func main() {
|
|
d, err := dot([]int{1, 3, -5}, []int{4, -2, -1})
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
fmt.Println(d)
|
|
}
|