JSPM – handle-arguments@3.0.1

Package Exports

handle-arguments

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (handle-arguments) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

Handles given Arguments object - return separatly last argument (commonly callback) and other arguments as Array. Useful in node-style callback flow.

Install

npm install handle-arguments --save
npm test

API

For more use-cases see the tests

handleArguments

<argsObject> {Arguments} the arguments object
return {Object}
- callback {Function} last argument if function or undefined
- cb {Function} alias of callback
- arguments {Array} all arguments without last (the callback)
- args {Array} alias of arguments

Example:

var handleArguments = require('handle-arguments')

function fixture() {
  return handleArguments(arguments)
}

console.log(fixture(1, 2, 3))
//=> {callback: undefined, cb: undefined
// arguments: [1, 2, 3], args: [1, 2, 3]}

console.log(fixture(1, 2, function _callback_ () {}))
//=> {callback: [Function: _callback_], cb: [Function: _callback_],
// arguments: [1, 2], args: [1, 2]}

instead of commonly used pattern

function fixture() {
  var args = [].slice.call(arguments)
  var len = args.length
  var callback = args[len - 1]

  if (typeof callback === 'function') {
    args = args.slice(0, -1)
    callback.apply(undefined, [null].concat(args))
  }
  return args
}

Or more real world examples callback-and-promise, thenify, thenify-all and a lot more...

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Author

Charlike Mike Reagent

License

Proudly generated by docks(1) on May 9, 2015.

handle-arguments