AK: Add StringView::count(char)

AK/StringUtils.cpp

@@ -593,6 +593,16 @@ size_t count(StringView str, StringView needle)
     return count;
 }
 
+size_t count(StringView str, char needle)
+{
+    size_t count = 0;
+    for (size_t i = 0; i < str.length(); ++i) {
+        if (str[i] == needle)
+            count++;
+    }
+    return count;
+}
+
 }
 
 }

AK/StringUtils.h

@@ -107,6 +107,7 @@ DeprecatedString replace(StringView, StringView needle, StringView replacement,
 ErrorOr<String> replace(String const&, StringView needle, StringView replacement, ReplaceMode);
 
 size_t count(StringView, StringView needle);
+size_t count(StringView, char needle);
 
 }
 

AK/StringView.h

@@ -330,6 +330,11 @@ public:
         return StringUtils::count(*this, needle);
     }
 
+    [[nodiscard]] size_t count(char needle) const
+    {
+        return StringUtils::count(*this, needle);
+    }
+
     template<typename... Ts>
     [[nodiscard]] ALWAYS_INLINE constexpr bool is_one_of(Ts&&... strings) const
     {