pxi-args/src/dsl/fp/types.js

A command-line arguments parser for pxi (pixie), the small, fast, and magical command-line data processor

const array   = (
  types =>
  (key, args, {only = null, desc = '', opts = null} = {}) =>
  ({key, types, args, only, desc, opts})
)

const number  = array(['number'])
const string  = array(['string'])
const bool    = array(['bool'])
const flag    = array([])
const command = array(null)

module.exports = {
  array,
  number,
  string,
  bool,
  flag,
  command
}