2185. Counting Words With a Given Prefix
Easy
You are given an array of strings
words and a string pref.Return the number of strings in
words that contain pref as a prefix.A prefix of a string
s is any leading contiguous substring of s.Example 1:
Input: words = ["pay","attention","practice","attend"], pref = "at"
Output: 2
Explanation: The 2 strings that contain "at" as a prefix are: "attention" and "attend".
Example 2:
Input: words = ["leetcode","win","loops","success"], pref = "code"
Output: 0
Explanation: There are no strings that contain "code" as a prefix.
Constraints:
1 <= words.length <= 1001 <= words[i].length, pref.length <= 100words[i]andprefconsist of lowercase English letters.
func prefixCount(words []string, pref string) int {
ans := 0
for _, word := range words {
if check(word, pref) { ans++ }
}
return ans
}
func check(s string, searchWord string) bool {
if len(searchWord) > len(s) { return false }
for i:=0; i<len(searchWord); i++ {
if s[i] != searchWord[i] {
return false
}
}
return true
}