prefixCount

Author: masx200

counting-words-with-a-given-prefix/export.go

@@ -0,0 +1,5 @@
+package index
+
+func PrefixCount(words []string, pref string) int {
+	return prefixCount(words, pref)
+}

counting-words-with-a-given-prefix/go.mod

@@ -0,0 +1,3 @@
+module github.com/masx200/leetcode-test/counting-words-with-a-given-prefix
+
+go 1.19

counting-words-with-a-given-prefix/index.go

@@ -0,0 +1,20 @@
+package index
+
+import "strings"
+
+func prefixCount(words []string, pref string) int {
+	return ReduceSlice(words, func(a int, v string) int {
+		if strings.HasPrefix(v, pref) {
+			return a + 1
+		}
+		return a
+	}, 0)
+}
+
+func ReduceSlice(s []string, c func(a int, v string) int, i int) int {
+
+	for _, v := range s {
+		i = c(i, v)
+	}
+	return i
+}