Composite [![build status][1]][2]

Compose functions together

Example

var compose = require("composite"),
composeAsync = compose.async

var composed = compose(function (b) {
return b * 2
}, function (a) {
return a * 3
})

composed(3) // 18

var composedAsync = composeAsync(function (err, b, cb) {
cb(null, b * 2)
}, function (a, cb) {
cb(null, a * 3)
})

composedAsync(3, function (err, result) {
// error === null, result === 18
})

Example abusing this

var composed = composeAsync(parseFile, stringifyFile, fs.readFile)

composed.call({}, "foo.js", function (err, data) {
// data = someJSONObject
})

// If you specify a this value, then that value will be used as this for
// all the functionsan empty object is given. This is useful to store state
function stringifyFile(err, data, cb) {
if (err) {
return cb(err)
}

this.data = data.toString()
cb(null)
}

function parseFile(err, cb) {
cb(err, this.data && JSON.parse(this.data))
}

Installation

npm install composite

Tests

make test

Contributors

- Raynos

MIT Licenced

[1]: https://secure.travis-ci.org/Raynos/composite.png
[2]: http://travis-ci.org/Raynos/composite