added count_str

fastsnake/templates/solution.cpp

@@ -55,7 +55,7 @@ vector<string> split(const string &str, char delimiter = ' ') {
     return tokens;
 }
 
-string toLowerCase(string &str) {
+string to_lower(string &str) {
     char new_str[str.length() + 1];
 
     for (int i = 0; i < str.length(); i++) {
@@ -66,7 +66,7 @@ string toLowerCase(string &str) {
     return string(new_str);
 }
 
-string toUpperCase(string &str) {
+string to_upper(string &str) {
     char new_str[str.length() + 1];
 
     for (int i = 0; i < str.length(); i++) {
@@ -76,7 +76,7 @@ string toUpperCase(string &str) {
     new_str[str.length()] = '\0';
     return string(new_str);
 }
-    
+
 string replace_str(string str, string sub_string, string new_string, int n = -1) {
     while (n--) {
         int pos = str.find(sub_string);
@@ -89,6 +89,17 @@ string replace_str(string str, string sub_string, string new_string, int n = -1)
     return str;
 }
 
+int count_str(string &str, string target) {
+   int occurrences = 0;
+   string::size_type pos = 0;
+
+   while ((pos = str.find(target, pos )) != string::npos) {
+          occurrences += 1;
+          pos += target.length();
+   }
+   return occurrences;
+}
+
 // [Slice Functions]: ==========================================================
 template <typename T> vector<T> slice(vector<T> &vec, int start, int end, int step = 1) {
     if (step == 0 || (step > 0 && start >= end) || (step < 0 && start <= end)) {