first is a flow-control library for node. It provides a clean and easy to use interface for sequentializing and parallelizing asynchronous functions.
Example:
var first = require('first');
first(function() {
fs.readFile('json-data', this);
}).
whilst(function () {
templates.compile('a-template', this);
}).
then(function (json, template) {
template[0].render(json[0], this);
}).
then(function (html) {
console.log(html);
});
npm install first
- Small
- Chainable & Readable
- Sequential & Parallel
- Sequence Parameters
- Ordered Parallel Paramters
- Batch Callbacks
- Unit Tests
$ stat -c "%s" ./lib/first.js
1736
first(function() {
// first do something
this();
}).
then(function () {
// then do something else
});
first(function () {
// first do something
this();
}).
then(function () {
// then do (parallel) job A
this();
}).
whilst(function () {
// whilst doing (parallel) job B
this();
}).
then(function () {
// then do something after A + B finished
});
first(function () {
// first do something yielding a result
this(result);
}).
then(function (result) {
// then do something with result
});
first(function () {
// first do something yielding err and result
this(err, result);
}).
whilst(function () {
// whilst doing something that yields 'Hello, World!'
this('Hello, World!');
}).
then(function (function1, function2) {
// then do something with those results
// function1[0] === err, function1[1] === result
// function2[0] === 'Hello, World!'
});
first(function () {
// first do something
this();
}).
then(function () {
// then do something else
this();
}, function {
// then do something else
this();
}).
then(function () {
// then do something else
this();
}).
whilst(function () {
// whilst doing something else
this();
}, function () {
// whilst doing something else
this();
});
make test
Copyright (c) 2011 Daniel Baulig daniel.baulig@gmx.de
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.