airplane in javascript assignment expert

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Airport simulation in JavaScript with a fixed number of aircraft waiting to takeoff and land [closed]

I am working on a simplified airport simulator in JavaScript with very simple CSS or JQuery animation to demonstrate a takeoff or a landing (such as an image disappearing on takeoff or landing). There is already a predetermined number of 5 aircraft (callsign represents aircraft) on the takeoff queue and 5 aircraft on a landing queue. Here is how i have started it

Since there is one runway. The landing aircraft should have priority when both arrival and departure times are the same. I am assuming that there is a takeoff every 1 minute and a landing every 2 minutes. I plan on using the arrival and departure functions to dequeue each queue using the Array shift() method.

For every dequeue, i should also animate very simply by making one of several images in html divs representing the queued aircraft dissolve or delete. The Big question is how should i go about implementing a timing feature to run the simulation and give priority to arrivals when need be? Also, how can i incorporate the image animation?

• 1 Have you written anything yet? –  Master Yoda Commented Feb 4, 2015 at 12:04
• Not yet. I am studying for an Interview so i need to learn so much in a short time especially since am new at OOP in JavaScript. being able to tackle this will teach a lot in a short time i hope. –  MrGG Commented Feb 5, 2015 at 7:14

2 Answers 2

I liked the use-case, so i worked-out a simulation (just for fun). I hope you are not a student and i am wasting your assignment now.

http://jsfiddle.net/martijn/398oezj0/13/

function AirPlane() { this.state = ko.observable(); this.name = ko.observable(); this.destination = ko.observable(); this.location = ko.observable(); this.arrivesOn = ko.observable(); this.takeOfftime = ko.observable(); this.startTime = null; // set take off state this.takeOff = function (runWay) { this.runWay = runWay; this.state("Taking off"); this.takeOfftime(60); } // set the destination this.setDestination = function (name, time) { this.startTime = time; this.arrivesOn(time); this.state("Flying"); this.destination(name); } // calculate an airplane number var n = Math.floor(1 + Math.random() * 1000).toString(); while (n.length < 4) { n = "0" + n; } // computed for the progress bar this.progress = ko.computed(function () { if (this.state() == "Flying" || this.state() == "Landing") { if (this.arrivesOn()) { return Math.floor(100 - ((this.startTime - this.arrivesOn()) / this.startTime) * 100).toString() + "%" } } else if (this.state() == "Taking off" && this.takeOfftime()) { return Math.floor(100 - ((60 - this.takeOfftime()) / 60) * 100).toString() + "%" } return null; }, this); this.name("PH" + n); // airplane clock, manages arriveal, landing and takingOff this.tick = function () { if (this.arrivesOn()) { this.arrivesOn(this.arrivesOn() - 1); if (this.state() == "Flying") { if (this.arrivesOn() < 60) { this.state("Landing"); } } else if (this.state() == "Landing") { if (this.arrivesOn() <= 0) { this.state("Landed") this.location("schiphol"); this.destination(""); this.arrivesOn(null) } } } if (this.takeOfftime()) { this.takeOfftime(this.takeOfftime() - 1); if (this.takeOfftime() <= 0) { this.state("Flying"); this.destination("Far Far away"); this.runWay.state("Free"); this.location(""); this.arrivesOn(null); this.runWay = null; this.takeOfftime(null); } } } } // for the future, when we have multiple runways :-) function RunWay() { this.state = ko.observable("Free"); } // Airfield object, future use, if we want to simulate multiple airfields function AirField(world) { this.world = world; this.name = "schiphol"; this.runWay = new RunWay(); // finds the first free runway, we have one, so easy this.getFreeRunway = function () { if (this.runWay.state() == "Free") { return this.runWay; } else { return null; } } // finds the first plane that is due to arrive, this includes planes in the landing state this.getNextArrival = function () { var arrivalOn; var arrivalPlane; var _this = this; this.world.airPlanes().forEach(function (ap) { if ( (ap.state() == "Flying" || ap.state() == "Landing") && ap.destination() == _this.name) { if (!arrivalPlane) { arrivalPlane = ap; arrivalOn = ap.arrivesOn(); } else if (ap.arrivesOn() < arrivalOn) { arrivalPlane = ap; arrivalOn = ap.arrivesOn(); } } }); return arrivalPlane; } // Finds a waiting airplane that is ready to depart, it must be on this airfield (duh) this.getWaitingAirPlane = function () { var _this = this; var returnValue; this.world.airPlanes().forEach(function (ap) { if (!returnValue && ap.state() == "Waiting" && ap.location() == _this.name) { returnValue = ap; } }); return returnValue; } // try to schedule a tack off // Check if we have 60s free before a plan STARTS landing == arrivesOn -60 // if we have that slot, the plane can takeof this.scheduleTakeOff = function () { var nextArrival = this.getNextArrival(); var freeRunway = this.getFreeRunway(); var waitingPlane = this.getWaitingAirPlane(); var landingOn = nextArrival.arrivesOn() - 60; if (freeRunway && landingOn > 60) { debugger; if (waitingPlane) { freeRunway.state("Occupied"); waitingPlane.takeOff(freeRunway); } } } } // World simulation function World() { this.airPlanes = ko.observableArray(); this.airField = new AirField(this); // the ticking clock this.time = ko.observable(0); var airPlane; // load 10 waiting planes for (var i = 0; i < 10; i++) { airPlane = new AirPlane(); airPlane.airField = this.airField; airPlane.state("Waiting"); airPlane.location("schiphol"); this.airPlanes.push(airPlane); } // load 10 flying planes, they arrive 120s after each other with 60s random to make things more interesting var arrivalTime = 0; for (var i = 0; i < 10; i++) { airPlane = new AirPlane(); var arrivalTime = arrivalTime + 120 + Math.floor(Math.random() * 60); airPlane.setDestination("schiphol", arrivalTime); this.airPlanes.push(airPlane); } // run the simulation this.tick = function () { this.time(this.time() + 1); var _this = this; // update plane progress this.airPlanes().forEach(function (ap) { ap.tick(); }); // try to schedule a tack off this.airField.scheduleTakeOff(); // play with the 100ms here to speedup or slow down window.setTimeout(function () { _this.tick(); }, 100); } } // bind the world var world = new World(); // start the clock world.tick(); ko.applyBindings(world); <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script> <strong>Time:<span data-bind="text:time"></span></strong> <br/> <table class="table table-striped table-condensed"> <thead> <tr> <th>#</th> <th>state</th> <th>Location</th> <th>Destination</th> <th>Arrives/TakesOff</th> </tr> </thead> <tbody data-bind="foreach:airPlanes"> <tr> <td data-bind="text:name"></td> <td data-bind="text:state"></td> <td data-bind="text:location"></td> <td data-bind="text:destination"></td> <td class="progress"> <div class="progress-bar" style="height:100%;" data-bind="style: { 'width': progress }, css:{ 'progress-bar-danger': (state()=='Taking off' || state()=='Landing'), 'progress-bar-success':state()=='Flying' }"> <span data-bind="text:arrivesOn"></span> <span data-bind="text:takeOfftime"></span> </div> </td> </tbody> </table>

• Thanks for your help. The code is very informative. i however don't understand how you implemented the whole timing of takeoffs and landings. Care to explain that a bit? If possible a pseudocode would be of great help –  MrGG Commented Feb 9, 2015 at 8:28
• An airplane is an object. –  Martijn Commented Feb 9, 2015 at 9:38
• Yes i do understand that. My question regards how to implement timing as you have done. i do not understand how you initiated the landing and takeoff sequence and enabling the landing to take priority when both landing and takeoff times are the same. Is my question clear sir? –  MrGG Commented Feb 9, 2015 at 9:57
• A simplified fiddle with only the "Arrival countdown logic" ( jsfiddle.net/martijn/ba9g9kh1/1 ) . Basically the airplane is an object with a state arrivesOn . The heart of the simulation, The World object has a tick method that is called every 100ms using a setTimeout call. This tick method manages the next step in the world by calling tick in every airplane object so the airplane can update its arrival time. Please review scheduleTakeOff function. That is finding the arrival time of the next plane and checks if it is possible to takeof the next plane. –  Martijn Commented Feb 9, 2015 at 10:05
• Yeah. I see your point. Thanks a lot for the help. –  MrGG Commented Feb 9, 2015 at 11:37

Javascript provides two timings functions :

• setTimeout(function, interval)
• setInterval(function, interval)

Have a look at the functions and how they can be used. And especially the difference between the two functions.

Not the answer you're looking for? Browse other questions tagged javascript or ask your own question .

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• Airplane Seat Assignment Probability Solution - Leetcode

Understand Leetcode Airplane Seat Assignment Probability With Brute Force and Optimal Solution

dynamic-programming

This document presents the solution to the problem Airplane Seat Assignment Probability - Leetcode .

Note: Make sure to go through the code comments as well. It’ll help you understand the concept better.

I’ll first try solving it by a brute force approach then I’ll move to a more optimal solution. While approaching towards the optimal solution, I’ll provide the approach behind the optimal solution.

If the first passenger takes his own seat, 1, then the other passengers will also be able to get their own seat because of the first condition, Take their own seat if it is still available .

What if he doesn’t? The probability of him taking the correct seat would be 1/n where n is the total number of passengers.

Let’s start with n = 1.

Since there is only one seat the passenger can only get that seat so here the probability is 1.

if n is 2 then these two possibilities are there:

In the second arrangement the nth person(2nd person) was able to get the seat. So, here the probability is 1/2 or 0.5.

Let’s consider n = 3 now:

Here the probability is 2/4 = 1/2

So, what have we done here:

• We’re allowing the 1st person to take each of the seats one by one.
• Then we allow the next person to take their seat, which can either be their allotted seat or any one of the remaining seat.
• We move ahead until all the seats are consumed
• Then we count all the arrangements that are possible, and the all the arrangements in which the nth person has their allotted seat.

I’ll create one array that will contain the seat allotment status for each of the pass.

This is the brute force approach. Do let me know about the improvements that can be made here in this code so that it’s readability improves.

If we observe all the arrangements made for each n = 2,3,4 then we can find some patterns

when the 1st passenger takes the 2nd passenger’s seat then the count of all those arrangements is 2 (n - 2)

• for n = 2 it’s 1
• for n = 3 it’s 2
• for n = 4 it’s 4

so, for n = 5 it’s 8

when the 1st passenger takes the 3nd passenger’s seat then the count of all those arrangements is 2 (n - 3)

• for n = 3 it’s 1
• for n = 4 it’s 2

so, for n = 5 it’s 4

This means when n = 4 then the total number of arrangements can be:

• when 1st seat is taken by the 1st person = 1 (because there can only be one such arrangement, 1,2,3,4)
• when 2nd seat is taken by the 1st person = 2 (n - 2) = 2 (4 - 2) = 4
• when 3rd seat is taken by the 1st person = 2 (n - 3) = 2 (4 - 3) = 2
• when 4rd seat is taken by the 1st person = 1 (because there can only be one such arrangement, 4,2,3,1)

1 + 4 + 2 + 1 = 8

So, the formula for getting the total number of seat arrangements is: 1 + 2 n-2 + 2 n-3 + … + 2 n-(n-1) + 1

Now, let’s look into the number of passes in which the n’th person gets the nth seat.

• You’ll find that if the 1st person takes the 1st seat then the last person will also get his own seat.
• If the last seat is taken by the 1st person the 1st seat will be taken by the 4th person and this is a failure scenario.
• For the rest of the cases you’ll find that the nth seat is taken by the nth passenger in half of the cases, ie., when 2nd seat taken by the 1st person, containing 4 such arrangements, then in half of such arrangements, 4th seat is taken by the 4th passenger(2,1,3,4 and 2,3,1,4)

1 + 0 + 2 + 1 = 4

So, the formula for getting the total number of seats arrangements in which nth person gets the last seat is: 1 + 0 + 2 n-2 /2 + 2 n-3 /2 + … + 2 n-(n-1) /2

So our answer would be: (1 + 0 + 2 n-2 /2 + 2 n-3 /2 + … + 2 n-(n-1) /2) / (1 + 2 n-2 + 2 n-3 + … + 2 n-(n-1) + 1)

and, this value will always be equal to 1/2. 😎

This makes the solution to this problem to be:

Related Pages:

• Minimum Score Triangulation of Polygon
• Longest Happy String Solution
• Integer Break Solution - Leetcode
• Longest Arithmetic Sequence Solution - Leetcode
• Longest Zig Zag Path in a Binary Tree Solution - Leetcode
• Minimum Path Sum Solution - Leetcode
• Arithemtic Slices Solution - Leetcode
• Count Submatrices With All Ones Solution - Leetcode
• Filling Bookcase Shelves Solution - Leetcode
• Minimum Cost for Tickets Solution - Leetcode

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Build a JS Class of Airplane - Using Typescript.

abdillahi09/JS-5---Assignment-10.2-Classes

Folders and files.

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Js-5---assignment-10.2-classes.

Assignment 2

• Introduction

This assignment will test your skills on JavaScript classes.

This assignment will help you master the following concepts:

• JavaScript getters and setters

• Prerequisites

Not Applicable.

• Associated Data Files
• Problem Statement

Create a JavaScript code that implements below.

• Create a class called Airplane whose constructor takes following parameters

o occupancy

• Validate the class properties to make a valid airplane object. Below are the validation rules

o name cannot be empty

o Occupancy cannot be empty, should not be negative and should not be more than 180

o Speed cannot be empty, should not be negative and should not be more than 900

• Add method named “status” which console logs the current status of the airplane in following format

“Airplane : Boeing 777 with 180 occupancy, is moving at 900 km/hr”

• Add methods increaseSpeed and decreaseSpeed which accepts single parameter which a value of speed to increase / decrease by existing speed

• create 3 Airplane objects and call their print methods

• increase speed of airplane objects by 200

• Approximate Time to Complete Task
• HTML 100.0%

Airplane Seat Assignment Probability self.__wrap_b(":R159l76:",1)

n passengers board an airplane with exactly n seats. The first passenger has lost the ticket and picks a seat randomly. Each subsequent passenger (from 2 to n) will take their own seat if it is available, otherwise, they will choose another seat at random. What is the probability that the nth passenger can sit in their own seat?

I want to discuss a solution

Help me solve this

Give more examples

What's wrong with my code?

How to use 'for loop' in javascript?

Building a Flight Simulator with Javascript and THREE.js

Restarting my old c++ project in javascript with three.js.

Update: I have been working on a significantly improved simulator, you can find the article here .

When I was working on my F-16 flightsim project back in the first lockdown I used raw OpenGL and C++ to build the game. After working on it for some time I realized that I was in a bit over my head. I was spending a lot of time just debugging OpenGL and fixing weird bugs in my arguably really bad C++ code. Never having worked with C++ before I was just figuring it out as I went along. The flight model was another thing, the physics and the flight control system proved to be orders of magnitude more complicated than I had imagined. At first I focused on building a sim for the MQ-9 Reaper combat drone, but I am now again working on the F-16 Viper, which is just a much more interesting aircraft in my opinion. The goal is to have a player controlled Viper and some type of opponent aircraft controlled by AI as well as some Surface-to-Air Missiles that can threaten the player. You can play a preliminary build here , without installing anything, in your web browser. The repository can be found on github .

Three.js proved to be absolutly perfect for my use case. It made everything so much easier and even came with a few special effects that make everything look much more beautiful in my opinion.

You can control the aircraft with WASD, use numbers 1 - 5 to switch between views.

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JS Tutorial

Js versions, js functions, js html dom, js browser bom, js web apis, js vs jquery, js graphics, js examples, js references, javascript assignment, javascript assignment operators.

Assignment operators assign values to JavaScript variables.

Shift Assignment Operators

Bitwise Assignment Operators

Logical Assignment Operators

The = Operator

The Simple Assignment Operator assigns a value to a variable.

Simple Assignment Examples

The += operator.

The Addition Assignment Operator adds a value to a variable.

Addition Assignment Examples

The -= operator.

The Subtraction Assignment Operator subtracts a value from a variable.

Subtraction Assignment Example

The *= operator.

The Multiplication Assignment Operator multiplies a variable.

Multiplication Assignment Example

The **= operator.

The Exponentiation Assignment Operator raises a variable to the power of the operand.

Exponentiation Assignment Example

The /= operator.

The Division Assignment Operator divides a variable.

Division Assignment Example

The %= operator.

The Remainder Assignment Operator assigns a remainder to a variable.

Remainder Assignment Example

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The <<= Operator

The Left Shift Assignment Operator left shifts a variable.

Left Shift Assignment Example

The >>= operator.

The Right Shift Assignment Operator right shifts a variable (signed).

Right Shift Assignment Example

The >>>= operator.

The Unsigned Right Shift Assignment Operator right shifts a variable (unsigned).

Unsigned Right Shift Assignment Example

The &= operator.

The Bitwise AND Assignment Operator does a bitwise AND operation on two operands and assigns the result to the the variable.

Bitwise AND Assignment Example

The |= operator.

The Bitwise OR Assignment Operator does a bitwise OR operation on two operands and assigns the result to the variable.

Bitwise OR Assignment Example

The ^= operator.

The Bitwise XOR Assignment Operator does a bitwise XOR operation on two operands and assigns the result to the variable.

Bitwise XOR Assignment Example

The &&= operator.

The Logical AND assignment operator is used between two values.

If the first value is true, the second value is assigned.

Logical AND Assignment Example

The &&= operator is an ES2020 feature .

The ||= Operator

The Logical OR assignment operator is used between two values.

If the first value is false, the second value is assigned.

Logical OR Assignment Example

The ||= operator is an ES2020 feature .

The ??= Operator

The Nullish coalescing assignment operator is used between two values.

If the first value is undefined or null, the second value is assigned.

Nullish Coalescing Assignment Example

The ??= operator is an ES2020 feature .

Test Yourself With Exercises

Use the correct assignment operator that will result in x being 15 (same as x = x + y ).

Start the Exercise

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Answer to Question #170269 in HTML/JavaScript Web Application for manikanta

Arithmetic Operations

Given a constructor function

ArithmeticOperations in the prefilled code and two numbers firstNumber and secondNumber as inputs, add the following methods to the constructor function using the prototype.MethodDescriptionratioOfNumbersIt Should return the ration of the numberssumOfCubesOfNumbersIt Should return the sum of cubes of the numbersproductOfSquaresOfNumbersIt Should return the product of squares of the numbers

• The first line of input contains a number firstNumber
• The second line of input contains a number secondNumber
• The first line of output should contain the ratio of firstNumber and secondNumber
• The second line of output should contain the sum of cubes of firstNumber and secondNumber
• The third line of output should contain the product of squares of firstNumber and secondNumber

Constraints

secondNumber should not be equal to zero

Sample Input 1

Sample Output 1

Sample Input 2

Sample Output 2

i want code in between write code here

"use strict";

process.stdin.resume();

process.stdin.setEncoding("utf-8");

let inputString = "";

let currentLine = 0;

process.stdin.on("data", (inputStdin) => {

 inputString += inputStdin;

process.stdin.on("end", (_) => {

 inputString = inputString.trim().split("\n").map((str) => str.trim());

function readLine() {

 return inputString[currentLine++];

/* Please do not modify anything above this line */

function ArithmeticOperations(firstNumber, secondNumber) {

 this.firstNumber = firstNumber;

 this.secondNumber = secondNumber;

function main() {

 const firstNumber = JSON.parse(readLine());

 const secondNumber = JSON.parse(readLine());

 const operation1 = new ArithmeticOperations(firstNumber, secondNumber);

 /* Write your code here */

 console.log(operation1.ratioOfNumbers());

 console.log(operation1.sumOfCubesOfNumbers());

 console.log(operation1.productOfSquaresOfNumbers());

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