diff --git a/packages/stdlib/src/types/ts/array.ts b/packages/stdlib/src/types/ts/array.ts
new file mode 100644
index 0000000..37d698d
--- /dev/null
+++ b/packages/stdlib/src/types/ts/array.ts
@@ -0,0 +1,4 @@
+/**
+ * A type that can be either a single value or an array of values
+ */
+export type Arrayable<T> = T | T[];
\ No newline at end of file
diff --git a/packages/stdlib/src/types/ts/function.ts b/packages/stdlib/src/types/ts/function.ts
new file mode 100644
index 0000000..bb88f96
--- /dev/null
+++ b/packages/stdlib/src/types/ts/function.ts
@@ -0,0 +1,9 @@
+/**
+ * Any function
+ */
+export type AnyFunction = (...args: any[]) => any;
+
+/**
+ * Void function
+ */
+export type VoidFunction = () => void;
\ No newline at end of file
diff --git a/packages/stdlib/src/types/ts/functions.ts b/packages/stdlib/src/types/ts/functions.ts
deleted file mode 100644
index cd57094..0000000
--- a/packages/stdlib/src/types/ts/functions.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-/**
- * Any function
- */
-export type AnyFunction = (...args: any[]) => any;
\ No newline at end of file
diff --git a/packages/stdlib/src/types/ts/index.ts b/packages/stdlib/src/types/ts/index.ts
index 442cb14..c4cbedb 100644
--- a/packages/stdlib/src/types/ts/index.ts
+++ b/packages/stdlib/src/types/ts/index.ts
@@ -1,2 +1,3 @@
 export * from './string';
-export * from './functions';
\ No newline at end of file
+export * from './function';
+export * from './array';
\ No newline at end of file