Counting the occurrence of one or more substrings in a string
Another way to do substring matching is with the suffixarray package. Here is an example of matching multiple patterns:
package main
import (
"fmt"
"index/suffixarray"
"regexp"
)
func main() {
r := regexp.MustCompile("an")
index := suffixarray.New([]byte("banana"))
results := index.FindAllIndex(r, -1)
fmt.Println(len(results))
}
You can also match a single substring with the Lookup function.
Use a regular expression:
https://play.golang.org/p/xMsHIYKtkQ
aORb := regexp.MustCompile("A|B")
matches := aORb.FindAllStringIndex("A B C B A", -1)
fmt.Println(len(matches))