curry

Currying and partial application utilities.

Currying

Provides features related to currying.

currying is the technique of translating the evaluation of a function that takes multiple arguments into evaluating a sequence of functions, each with a single argument.

curry

curry returns curried function.

import { curry } from "https://deno.land/x/curry@$VERSION/mod.ts";

declare const fn: (a: string, b: number, c: boolean) => void;
const curriedFn = curry(fn);

curriedFn("")(0)(false);
curriedFn("", 0)(false);
curriedFn("", 0, false);

Partial application

Partial application refers to the process of fixing a number of arguments to a function, producing another function of smaller arity.

It has the following characteristics:

• The length property is not strict.
• The name property is bound.

papplyLeft

Create a bound function with arguments fixed from the left.

import { papplyLeft } from "https://deno.land/x/curry@$VERSION/mod.ts";

declare const fn: (a: string, b: number, c: boolean) => void;

const ternary = papplyLeft(fn);
const binary = papplyLeft(fn, "");
const unary = papplyLeft(fn, "", 0);
const nullary = papplyLeft(fn, "", 0, false);

papplyRight

Create a bound function with arguments fixed from the right

import { papplyRight } from "https://deno.land/x/curry@$VERSION/mod.ts";

declare const fn: (a: string, b: number, c: boolean) => void;

const binary = papplyRight(fn, false);
const unary = papplyRight(fn, false, 0);
const nullary = papplyRight(fn, false, 0, "");

papplyRest

Create a bound function with fixed arguments except the first one.

import { papplyRest } from "https://deno.land/x/curry@$VERSION/mod.ts";

declare const fn: (a: string, b: number, c: boolean) => void;

const binary = papplyRest(fn, 0);
const unary = papplyRest(fn, 0, false);

API

See deno doc for all APIs.

License

Copyright © 2023-present Tomoki Miyauchi.

Released under the MIT license