thunkify

What is thunkify?

The 'thunkify' npm package is used to convert functions that take a callback into functions that return thunks. Thunks are functions that encapsulate a computation or action to be performed later, which can be particularly useful in asynchronous programming.

What are thunkify's main functionalities?

Convert callback-based functions to thunks

This feature allows you to convert a function that uses a callback (like 'fs.readFile') into a function that returns a thunk. The thunk can then be called with a callback to execute the original function.

const thunkify = require('thunkify');
const fs = require('fs');

const readFileThunk = thunkify(fs.readFile);

const thunk = readFileThunk('example.txt', 'utf8');

thunk((err, data) => {
  if (err) throw err;
  console.log(data);
});

Other packages similar to thunkify

co

The 'co' package is a generator-based control flow goodness for nodejs and the browser, using thunks. It allows you to write non-blocking code in a synchronous style using generators. Compared to 'thunkify', 'co' provides a more comprehensive solution for managing asynchronous control flow.

bluebird

The 'bluebird' package is a fully featured promise library with focus on innovative features and performance. It provides a 'promisify' method that converts callback-based functions to return promises, which can be seen as an alternative to thunks. 'bluebird' offers more features and flexibility compared to 'thunkify'.

util.promisify

The 'util.promisify' method in Node.js standard library converts callback-based functions to return promises. It is similar to 'thunkify' in that it transforms callback-based functions, but it uses promises instead of thunks. This is a built-in utility in Node.js and is widely used for modern asynchronous programming.

README

thunkify

Turn a regular node function into one which returns a thunk, useful for generator-based flow control.

Installation

$ npm install thunkify

Example

var thunkify = require('thunkify');
var fs = require('fs');

fs.readFile = thunkify(fs.readFile);

fs.readFile('package.json', 'utf8')(function(err, str){
  
});

License

MIT