New elements can be inserted at the rear of the queue while older elements are removed from the front of the queue

Question

New elements can be inserted at the rear of the queue while older elements are removed from the front of the queue

I'm new to JavaScript and currently working on a task involving queues. Here is the task description:

Create a function called nextInLine that takes an array (arr) and a number (item) as parameters. The function should add the number to the end of the array, then remove the first element of the array. Finally, the nextInLine function should return the element that was removed.

function nextInLine(arr, item) {
  // Write your code here
  
  return item; // Modify this line
}

// Test Setup
var testArr = [1,2,3,4,5];

// Display Code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine(testArr, 6)); // Adjust this line for testing
console.log("After: " + JSON.stringify(testArr));

Expected results:

nextInLine([], 1) should return 1
nextInLine([2], 1) should return 2
nextInLine([5,6,7,8,9], 1) should return 5
After nextInLine(testArr, 10), testArr[4] should be 10

javascript arrays json

Answer 1

Answer №1

Give this a shot:

function dequeue(array, element) {
  // Add your code here
  array.push(element);
  var output = array[0];
  array.shift();
  return output;  // Don't forget to update this line
}

// Setting up the test
var originalArray = [5, 10, 15, 20, 25];

// Showcasing the code
console.log("Before: " + JSON.stringify(originalArray));
console.log(dequeue(originalArray, 50)); // Update this line for testing
console.log("After: " + JSON.stringify(originalArray));
console.log(dequeue(originalArray, 20));

Answer 2

Give this a shot:

function dequeue(array, element) {
  // Add your code here
  array.push(element);
  var output = array[0];
  array.shift();
  return output;  // Don't forget to update this line
}

// Setting up the test
var originalArray = [5, 10, 15, 20, 25];

// Showcasing the code
console.log("Before: " + JSON.stringify(originalArray));
console.log(dequeue(originalArray, 50)); // Update this line for testing
console.log("After: " + JSON.stringify(originalArray));
console.log(dequeue(originalArray, 20));

Answer 3

Answer №2

VIEW DEMO

function retrieveFirst(arr, item) {
  arr.push(item);
  return arr.shift();
}

console.log(retrieveFirst([], 3)); // 3
console.log(retrieveFirst([6], 9)); // 6
console.log(retrieveFirst([2,4,6,8,10], 12)); // 2

Answer 4

VIEW DEMO

function retrieveFirst(arr, item) {
  arr.push(item);
  return arr.shift();
}

console.log(retrieveFirst([], 3)); // 3
console.log(retrieveFirst([6], 9)); // 6
console.log(retrieveFirst([2,4,6,8,10], 12)); // 2

Answer 5

Answer №3

function moveToFrontOfLine(array, newItem) {
// Your implementation goes here
array.push(newItem);
return array.shift(); // Update this line according to your logic
}
// Setting up the test scenario
var testArray = [1, 2, 3, 4, 5];
// Showing the result
console.log("Initial Array: " + JSON.stringify(testArray));
console.log(moveToFrontOfLine(testArray, 10)); // Adjust this line for testing
console.log("Final Array: " + JSON.stringify(testArray));
console.log(moveToFrontOfLine(testArray, 4));

Answer 6

function moveToFrontOfLine(array, newItem) {
// Your implementation goes here
array.push(newItem);
return array.shift(); // Update this line according to your logic
}
// Setting up the test scenario
var testArray = [1, 2, 3, 4, 5];
// Showing the result
console.log("Initial Array: " + JSON.stringify(testArray));
console.log(moveToFrontOfLine(testArray, 10)); // Adjust this line for testing
console.log("Final Array: " + JSON.stringify(testArray));
console.log(moveToFrontOfLine(testArray, 4));

New elements can be inserted at the rear of the queue while older elements are removed from the front of the queue

Answer №1

Answer №2

Answer №3

Similar questions

Using the forEach method, we can create multiple buttons in ReactJS and also access the onClick handler

Is there a way to incorporate various string values in a single function?

Establish a connection between servers operating on two distinct ports

React Router 4 - Optimizing Component Refresh by Remounting Instead of Re-Rendering

Converting a string to a date type within a dynamically generated mat-table

Uh-oh! It seems like there is a deployment error in NextJS on Vercel. The issue is that Nested

Leveraging AJAX for transmitting form information to a php script without relying on jQuery

What issue lies within this particular for loop?

Jquery Validation Plugin - Specifically for validating numeric inputs in specific situations

Learn the process of utilizing JavaScript/Node.js to dynamically upload images onto a webpage directly from a database

What is the most effective method for testing event emitters?

What is the best way to retrieve the nearest or preceding object regardless of the document's layout using jQuery?

What is the process for adding elements to an object in Angular JS?

Pass a PHP array to JavaScript and use jqplot to create a plot

Utilizing jQuery UI Slider for Calculating Percentage

retrieving information from a data attribute

AJAX brings back the previous value from an array

Why does the data continue to remain empty?

Is there a method to iterate through dynamically added nested arrays, similar to the Russian Matryoshka dolls?

To obtain the desired response, I must make an additional GET request