ority

Object based arity

Lets you specify arity with an array of objects of name-type pairs:

Install

npm install ority

Usage

const ority = require('ority')

function fn () {
  const args = ority(arguments, [{
    name: 'string',
    options: 'object'
  }, {
    name: 'string',
    flag: 'boolean',
  }, {
    name: 'string',
  }, {
    flag: 'boolean',
  }, {
    options: 'object',
  }], {
    defaults: {
      flag: false
    }
  })

  console.log(args)
}

fn('a')
// => { name: 'a', flag: false }

fn('a', true)
// => { name: 'a', flag: true }

fn({ json: true })
// => { options: { json: true }, flag: false }

API

ority(args, arities, options)

• args [arguments] Arguments from the calling function.

• arities [array] Array of object based arities.

• options [object]

  • error [Error|string] Custom Error to be thrown instead of the default one.
  • onError [function] Custom error handler whose return value gets bubbled up returned to parent caller
  • defaults [object] Default object whose properties are used to set properties not matched/found in the arguments.

Libraries used

• kind-of: to perform type comparisons.