Question

JavaScript - Create a class using "names" as the identifier.

Create a constructor. The constructor must have elements as follow:

first ( value passed will be String )
last ( value passed will be String )
age ( value passed will be Numeric )

The constructor will assign the values for the three elements and should use the "this" keyword

Create a function, using "printObject" as the identifier

printObject:

This function will have three input parameters:

allNames , sortType, message

Will sort the array of objects (allNames) using sortType as the key to how the arrays objects will be sorted.

These sort functions, are higher order functions, one required for each sort option except none. A higher order function type is calling a function with an argument that is a function. In this assignment, one would be using the builtin sort for arrays, allNames.sort( your function here ); This function will override the default sort order, built into array.sort()

The sort options are first , last , age, none.

Will print the message to the console

Will use a loop to print out the array by index ascending and display the values located in the elements: first last age, for each index accessed

Create a function main, no input parameters

main:

Create the empty array using the identifier "allNames"

Using the push() method, load 4 new objects of names to the array allNames, populating the fields first , last , age ( data is of your choosing, for example: allNames.push( new names("Cammo", "Hammer", 39));

Call printObject, passing the array , sort method as a string ( options are first, last, age, none )

Last line of the script, would be the call to the main

Note: It is required to use the ES6 style of keywords => instead of the older function and for variables use the keyword let, not var, class and within the constructor, not function.

Answer 1

class Names {

  constructor(first, last, age) {

    this.first = first;

    this.last = last;

    this.age = age;

  }

}

function printObject(allNames, sortType, message) {

  if (sortType == "first") {

    allNames.sort(function(a, b) {

      return a.first.localeCompare(b.first);

    });

  }

  if (sortType == "last") {

    allNames.sort(function(a, b) {

      return a.last.localeCompare(b.last);

    });

  }

  if (sortType == "age") {

    allNames.sort(function(a, b) {

      return a.age - b.age;

    });

  }

  for (let i = 0; i < allNames.length; i++) {

    console.log(message);

    console.log(

      allNames[i].first + " " + allNames[i].last + " " + allNames[i].age

    );

  }

}

function main() {

  var allNames = [];

  allNames.push(new Names("Cammo", "Hammer", 39));

  allNames.push(new Names("Jhon", "Doe", 50));

  allNames.push(new Names("Liza", "Helen", 70));

  allNames.push(new Names("Anthony", "Jhonson", 30));

  allNames.push(new Names("Zakir", "Nayak", 25));

  printObject(allNames, "age", "Message");

}

main();