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Core functional combinators and higher-order functions
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Build Status NPM version Dependencies Status stable

Core combinators and higher-order functions


λ = require('core.lambda')

function add2(a, b) { return a + b }
var add = λ.curry(add2)

λ.compose(add(1), λ.compose( λ.uncurry(add2)
                           , λ.constant([2, 3])))()
// => 6


The easiest way is to grab it from NPM. If you're running in a Browser environment, you can use Browserify

$ npm install core.lambda

Using with CommonJS

If you're not using NPM, Download the latest release, and require the core.lambda.umd.js file:

var Lambda = require('core.lambda')

Using with AMD

Download the latest release, and require the core.lambda.umd.js file:

require(['core.lambda'], function(Lambda) {
  ( ... )

Using without modules

Download the latest release, and load the core.lambda.umd.js file. The properties are exposed in the global folktale.core.lambda object:

<script src="/path/to/core.lambda.umd.js"></script>

Compiling from source

If you want to compile this library from the source, you'll need Git, Make, Node.js, and run the following commands:

$ git clone git://
$ cd core.lambda
$ npm install
$ make bundle

This will generate the dist/core.lambda.umd.js file, which you can load in any JavaScript environment.


You can read the documentation online or build it yourself:

$ git clone git://
$ cd core.lambda
$ npm install
$ make documentation

Then open the file docs/index.html in your browser.

Platform support

This library assumes an ES5 environment, but can be easily supported in ES3 platforms by the use of shims. Just include es5-shim :)


Copyright (c) 2013 Quildreen Motta.

Released under the MIT licence.

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