code: function _curry (n, fn, args) {
    args = args || []
    return function partial () {
      var rest = arrayFrom(arguments)
      var allArgs = concat(args, rest)
      return n > length(allArgs)
        ? _curry(n, fn, allArgs)
        : _call(fn, allArgs.slice(0, n))
    }
  }
docs: Returns a function of n-arity partially applied with supplied arguments
  @param  {Number}   n         - arity of function to partially apply
  @param  {Function} fn        - function to partially apply
  @param  {Array}    args = [] - arguments to apply to new function
  @return {Function}           - partially-applied function