console.log("hello world!");

​

const arrayMethodsObj = {

  method: {

    concat: {

      name: "concat",

      desc: "Joins two or more arrays and returns a new array with all the items.",

      code: [

        "var pizzaMeatParts = ['pepperoni', 'ham', 'bacon'];",

        "var pizzaVegetableParts = ['pepper', 'onion'];",

        "var pizzaParts = pizzaMeatParts.concat(pizzaVegetableParts);"

      ],

      result: [

        "pizzaParts == ['pepperoni', 'ham', 'bacon', 'pepper', 'onion']"

      ]

    },

    indexOf: {

      name: "indexOf",

      desc: "Locates the item in the array and returns its index.",

      code: [

        "var pizzaMeatParts = ['pepperoni', 'ham', 'bacon'];",

        "var baconIndex = pizzaMeatParts.indexOf('bacon');"

      ],

      result: [

        "baconIndex == 2"

      ]

    },

    join: {

      name: "join",

      desc: "Creates a string from the items in the array. The items are comma-delimited by default, but you can pass an alternate separator.",

      code: [

        "var pizzaMeatParts = ['pepperoni', 'ham', 'bacon'];",

        "var meatParts = pizzaMeatParts.join();"

      ],

      result: [

        "meatParts == \"pepperoni,ham,bacon\""

      ]

    },

  },

  count: function() {

    return Object.keys(this.method).length;

  }

};

​

function initialize() {

  console.log("count: " + arrayMethodsObj.count());

  Object.keys(arrayMethodsObj.method).forEach((key) => {

    console.group();

    console.log(key);

    console.log(arrayMethodsObj.method[key].desc);

    console.log(arrayMethodsObj.method[key].code.join("").replace(/;/g, ";\n"));

    console.log(arrayMethodsObj.method[key].result.join("").replace(/;/g, ";\n"));

    console.groupEnd();

  }                                            

  );

}