blob: dc35146668aa298e89cf1474c5ffefe296e25eda (
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package main
import (
"fmt"
"os"
)
func buddy_strings(string1 string, string2 string) bool {
var runes1 = []rune(string1)
var runes2 = []rune(string2)
if len(runes1) != len(runes2) { return false }
var swaps int = 0
var pair_exists bool = false
var previous_character1 rune
var previous_character2 rune
for i := range runes1 {
var character1 rune = runes1[i]
var character2 rune = runes2[i]
if swaps == 1 {
// second character of swap
if previous_character2 != character1 || character2 != previous_character1 {
return false
}
swaps = 2
} else if character1 != character2 {
// starting the first swap
if swaps > 0 { return false }
previous_character1 = character1
previous_character2 = character2
swaps = 1
}
pair_exists = pair_exists || i > 0 && runes1[i-1] == runes1[i]
}
return swaps == 0 && pair_exists || swaps == 2
}
func main() {
var inputs = os.Args[1:]
for arg := 0; arg < len(inputs) - 1; arg += 2 {
var buddies string
if buddy_strings(inputs[arg], inputs[arg+1]) {
buddies = "yes"
} else {
buddies = "no"
}
fmt.Printf("%-30s\n%-30s\n -> %s\n", inputs[arg], inputs[arg+1], buddies)
}
}
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