diff --git a/go/find-common-characters.go b/go/find-common-characters.go new file mode 100644 index 0000000..1c0ec7b --- /dev/null +++ b/go/find-common-characters.go @@ -0,0 +1,34 @@ +package find_common_characters + +func commonChars(words []string) []string { + A := int('a') + countCharacters := func(counters []int, word string) { + for _, c := range word { + counters[int(c)-A]++ + } + } + setCommon := func(common []int, word []int) { + for i, count := range word { + common[i] = min(common[i], count) + } + } + + commonCounters := make([]int, 26) + countCharacters(commonCounters, words[0]) + + for _, word := range words { + wordCounters := make([]int, 26) + + countCharacters(wordCounters, word) + setCommon(commonCounters, wordCounters) + } + + var result []string + for i, count := range commonCounters { + for count > 0 { + result = append(result, string(rune(A+i))) + count-- + } + } + return result +}