functionfoundry/fn/choose.js

Pure function JavaScript library

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = choose;

var _error = require('./error');

var _error2 = _interopRequireDefault(_error);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// CHOOSE accepts an index and a list of items. It returns the item that corresponds to the index.
function choose(index) {

  // Return `#NA!` if index or items are not provided.
  if (!index || (arguments.length <= 1 ? 0 : arguments.length - 1) === 0) {
    return _error2.default.na;
  }

  // Return `#VALUE!` if index is less than 1 or greater than 254.
  if (index < 1 || index > 254) {
    return _error2.default.value;
  }

  // Return `#VALUE!` if number of items is less than index.
  if ((arguments.length <= 1 ? 0 : arguments.length - 1) < index) {
    return _error2.default.value;
  }

  // Return the item.
  return arguments.length <= index - 1 + 1 ? undefined : arguments[index - 1 + 1];
} // Copyright 2015 JC Fisher

module.exports = exports['default'];