Add readonly array support to array-splitAt

angus-c · Apr 25, 2023 · fef8e07 · fef8e07
1 parent d0bac2f
commit fef8e07
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/packages/array-split-at/index.d.ts b/packages/array-split-at/index.d.ts
@@ -1 +1 @@
-export default function splitAt<T>(arr: T[], n?: number | null): [T[], T[]]
+export default function splitAt<T>(arr: readonly T[], n?: number | null): [T[], T[]]
diff --git a/packages/array-split-at/index.tests.ts b/packages/array-split-at/index.tests.ts
@@ -6,6 +6,9 @@ const test2: [number[], number[]] = splitAt([1, 2, 3, 4, 5], -1); // [[1, 2, 3,
 const test3: [unknown[], unknown[]] = splitAt([], 3); // [[], []]
 const test4: [boolean[], boolean[]] = splitAt([true, false]); // [[], [true, false]]
 
+const readonlyArr: readonly number[] = [1, 2, 3]
+splitAt(readonlyArr, 1)
+
 // Not OK
 // @ts-expect-error
 splitAt()
@@ -18,4 +21,4 @@ splitAt([], true)
 // @ts-expect-error
 splitAt([], [])
 // @ts-expect-error
-splitAt([], 2, 3)
+splitAt([], 2, 3)