20201225

20201225/main.go

@@ -0,0 +1,73 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+)
+
+func main() {
+	fmt.Println(strings.Trim("Bob hit a ball, the hit BALL flew far after it was hit.", ",."))
+}
+
+func maxCountWord(s, ban string) string {
+	s = strings.ToLower(s)
+	sb := strings.Builder{}
+	for _, cn := range s {
+		c := byte(cn)
+		if isAlphabet(c) || c == ' ' {
+			sb.WriteByte(c)
+		}
+	}
+	ws := strings.Split(sb.String(), " ")
+	m := make(map[string]int)
+	for _, w := range ws {
+		if w == ban {
+			continue
+		}
+		m[w]++
+	}
+	max := 0
+	w := ""
+	for k, v := range m {
+		if v > max {
+			max = v
+			w = k
+		}
+	}
+	return w
+}
+
+func maxCountWord2(s, ban string) string {
+	m := make(map[string]int)
+	s = strings.ToLower(s)
+	sb := strings.Builder{}
+	for _, cn := range s {
+		c := byte(cn)
+		if isAlphabet(c) {
+			sb.WriteByte(c)
+			continue
+		}
+		if c == ' ' {
+			word := sb.String()
+			if word != ban {
+				m[word]++
+			}
+			sb = strings.Builder{}
+			continue
+		}
+	}
+	max := 0
+	w := ""
+	for k, v := range m {
+		if v > max {
+			max = v
+			w = k
+		}
+	}
+	return w
+
+}
+
+func isAlphabet(c byte) bool {
+	return c >= 'a' && c <= 'z'
+}