object-key-mirror/lib/index.js

Object key mirror is a zero-dependency Node.js module that lets you easily create objects with values equal to their key names.

"use strict";

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

/**
*  takes in an array and returns an object with 
*  keys and values equal to the items in the array.
* 
* @param {object} arr - An array of primitive types
* 
* @returns {object} - an object with keys and values equal to the items in the parameter supplied.
*/
exports.default = function (arr) {
  try {
    if (arr === undefined) {
      throw new Error("objectKeyMirror: Error! Please supply and argument.");
    } else if (!Array.isArray(arr)) {
      throw new Error("objectKeyMirror: Error! Argument must be an array. " + arr + " is not an array.");
    }
    return arr.reduce(function (mirroredObject, token) {
      mirroredObject[token] = "" + token;
      return mirroredObject;
    }, {});
  } catch (err) {
    console.error(err.message);
  }
};