feat: add 0651-hard-length-of-string-2

Author: coderhyy

type-challenges/0651-hard-length-of-string-2/template.ts

@@ -0,0 +1,6 @@
+export type LengthOfString<
+  S extends string,
+  Rest extends unknown[] = []
+> = S extends `${infer F}${infer R}`
+  ? LengthOfString<R, [...Rest, F]>
+  : Rest["length"];

type-challenges/0651-hard-length-of-string-2/test-cases.ts

@@ -0,0 +1,35 @@
+import type { Equal, IsTrue } from "@type-challenges/utils";
+import type { LengthOfString } from "./template";
+
+type cases = [
+  IsTrue<Equal<LengthOfString<"">, 0>>,
+  IsTrue<Equal<LengthOfString<"1">, 1>>,
+  IsTrue<Equal<LengthOfString<"12">, 2>>,
+  IsTrue<Equal<LengthOfString<"123">, 3>>,
+  IsTrue<Equal<LengthOfString<"1234">, 4>>,
+  IsTrue<Equal<LengthOfString<"12345">, 5>>,
+  IsTrue<Equal<LengthOfString<"123456">, 6>>,
+  IsTrue<Equal<LengthOfString<"1234567">, 7>>,
+  IsTrue<Equal<LengthOfString<"12345678">, 8>>,
+  IsTrue<Equal<LengthOfString<"123456789">, 9>>,
+  IsTrue<Equal<LengthOfString<"1234567890">, 10>>,
+  IsTrue<Equal<LengthOfString<"12345678901">, 11>>,
+  IsTrue<Equal<LengthOfString<"123456789012">, 12>>,
+  IsTrue<Equal<LengthOfString<"1234567890123">, 13>>,
+  IsTrue<Equal<LengthOfString<"12345678901234">, 14>>,
+  IsTrue<Equal<LengthOfString<"123456789012345">, 15>>,
+  IsTrue<Equal<LengthOfString<"1234567890123456">, 16>>,
+  IsTrue<Equal<LengthOfString<"12345678901234567">, 17>>,
+  IsTrue<Equal<LengthOfString<"123456789012345678">, 18>>,
+  IsTrue<Equal<LengthOfString<"1234567890123456789">, 19>>,
+  IsTrue<Equal<LengthOfString<"12345678901234567890">, 20>>,
+  IsTrue<Equal<LengthOfString<"123456789012345678901">, 21>>,
+  IsTrue<Equal<LengthOfString<"1234567890123456789012">, 22>>,
+  IsTrue<Equal<LengthOfString<"12345678901234567890123">, 23>>,
+  IsTrue<
+    Equal<
+      LengthOfString<"aaaaaaaaaaaaggggggggggggggggggggkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa">,
+      272
+    >
+  >
+];