1002. 查找常用字符

1002. 查找常用字符

package main
import "fmt"
func commonChars(A []string) []string {
     m :=make(map[byte]int,0)
     for idx,v:=range A{
         if idx==0{
            for i:=range v{
                m[v[i]]++
            }
        }else {
            n :=make(map[byte]int,0)
            for i:=range v{
                n[v[i]]++
            }
            for k,v:=range m{
                 if r,ok:=n[k];ok{
                    m[k]=min(v,r)
                }else {
                    delete(m,k)
                 }
            }
        }
     }
     var res []string
     for k,v:=range m{
         for i:=0;i<v;i++{
             res =append(res,string(k))
        }
     }
     return res
}
func min(a,b int)int{
    if a<b{
        return a
    }
    return b
}
func main() {
    fmt.Println(commonChars([]string{"bella","label","roller"}))
    fmt.Println(commonChars([]string{"cool","lock","cook"}))
}