Skip to main content

call

TS JS Deno

Given a key and a set of arguments, call them when given a context. Primarily useful in composition.

Use a closure to call a stored key with stored arguments.

typescript
export const call =
(key: string, ...args: any[]) =>
(context: any) =>
context[key](...args);
typescript
Promise.resolve([1, 2, 3])
.then(call("map", (x) => 2 * x))
.then(console.log); // [ 2, 4, 6 ]
const map = call.bind(null, "map");
Promise.resolve([1, 2, 3])
.then(map((x) => 2 * x))
.then(console.log); // [ 2, 4, 6 ]