AK: Support case-insensitive HashMap<String, T>.

We achieve this by allowing you to specify custom traits for the key type.
For convenience, we also provide a CaseInsensitiveStringTraits for String.

1 files changed, 9 insertions, 0 deletions

diff --git a/AK/Tests/TestHashMap.cpp b/AK/Tests/TestHashMap.cpp
index 0820cd9c42..55455b1d16 100644
--- a/AK/Tests/TestHashMap.cpp
+++ b/AK/Tests/TestHashMap.cpp
@@ -32,5 +32,14 @@ int main()
     EXPECT(number_to_string.find(3) == number_to_string.end());
 
     EXPECT_EQ(loop_counter, 3);
+
+    {
+        HashMap<String, int, CaseInsensitiveStringTraits> casemap;
+        EXPECT_EQ(String("nickserv").to_lowercase(), String("NickServ").to_lowercase());
+        casemap.set("nickserv", 3);
+        casemap.set("NickServ", 3);
+        EXPECT_EQ(casemap.size(), 1);
+    }
+
     return 0;
 }