feat: trim-right

src/04803-medium-trim-right.ts

@@ -0,0 +1,18 @@
+// ============= Test Cases =============
+import type { Equal, Expect } from './test-utils'
+
+type cases = [
+  Expect<Equal<TrimRight<'str'>, 'str'>>,
+  Expect<Equal<TrimRight<'str '>, 'str'>>,
+  Expect<Equal<TrimRight<'str     '>, 'str'>>,
+  Expect<Equal<TrimRight<'     str     '>, '     str'>>,
+  Expect<Equal<TrimRight<'   foo bar  \n\t '>, '   foo bar'>>,
+  Expect<Equal<TrimRight<''>, ''>>,
+  Expect<Equal<TrimRight<'\n\t '>, ''>>
+]
+
+type Space = ' ' | '\n' | '\t'
+// ============= Your Code Here =============
+type TrimRight<S extends string> = S extends `${infer F}${Space}`
+  ? TrimRight<F>
+  : S