https://github.com/critocrito/namefn

Set the name property of a function.
https://github.com/critocrito/namefn

functional-programming functions javascript repl

Last synced: 7 months ago
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Set the name property of a function.

• Host: GitHub
• URL: https://github.com/critocrito/namefn
• Owner: critocrito
• License: gpl-3.0
• Created: 2018-05-08T21:52:07.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2019-11-07T22:11:58.000Z (over 6 years ago)
• Last Synced: 2025-08-04T05:18:21.868Z (8 months ago)
• Topics: functional-programming, functions, javascript, repl
• Language: JavaScript
• Size: 1.24 MB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

          
# `namefn`

Set the name property of a function.

## Synopsis

[![License: GPL v3](https://img.shields.io/badge/License-GPL%20v3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0) [![npm version](https://img.shields.io/npm/v/@critocrito/namefn.svg?style=flat)](https://www.npmjs.com/package/@critocrito/namefn) [![Build Status](https://travis-ci.org/critocrito/namefn.svg?branch=master)](https://travis-ci.org/critocrito/namefn) [![Coverage Status](https://coveralls.io/repos/github/critocrito/namefn/badge.svg)](https://coveralls.io/github/critocrito/namefn) [![Greenkeeper badge](https://badges.greenkeeper.io/critocrito/namefn.svg)](https://greenkeeper.io/)

When programmatically generating functions in JavaScript, they often lack a

name. This reduces the usability of using those functions in a REPL. `namefn`

is a little helper to set the names of functions at construction time.

## Installation

```sh

npm install @critocrito/namefn

```

## Usage

```js

import namefn from "@critocrito/namefn";

const f = namefn("identity", x => x);

console.log(f.name); // identity

f; // [Function: identity]

```

## Examples

```js

import namefn from "@critocrito/namefn";

const f = x => () => x;

const g = f(23);

console.log(g.name); // ""

g; // ""

const constant23 = namefn("constant23", f(23));

console.log(constant23.name); // "constant23"

constant23; // "[Function: constant23]"

```

The following example implements a `curry` function, and includes the number

of missing arguments in the function name.

```js

import namefn from "@critocrito/namefn";

const curry = n => {

  const localCurry = (name, f, ...args) => {

    const g = (...largs) => {

      const rest = args.concat(largs);

      if (rest.length < n) return localCurry(name, f, ...rest);

      return f(...rest);

    };

    return namefn(`${name}-${n - args.length}`, g);

  };

  return namefn(`curry${n}`, localCurry);

};

const curry2 = curry(2);

const map = curry2("map", (f, xs) => xs.map(f));

map; // [Function: map-2]

const addOne = map(i => i + 1);

addOne; // [Function: map-1]

```

## License

[GPL 3.0 licensed](LICENSE)