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Let us understand how we're going to create and represent a binary search tree in Javascript. We'll first need to create the class BinarySearchTree and define a property Node on it. Exampleclass BinarySearchTree { constructor() { // Initialize a root element to null. this.root = null; } } BinarySearchTree.prototype.Node = class { constructor(data, left = null, right = null) { this.data = data; this.left = left; this.right = right; } };We've simply created a class representation of our BST class. We'll fill this class in as we proceed to learn functions that we'll add to this structure.
The first insertion in a newly created binary tree creates a node at the root. Further insertions will be inserted according to the binary search tree property of left children being smaller than parent and right ones being greater than parents.Let us look at how we can implement this algorithm in code −ExampleinsertIter(data) { let node = new this.Node(data); // Check if the tree is empty if (this.root === null) { // Insert as the first element this.root = node; return; } let currNode = this.root; ... Read More
The telephone input type is used in HTML using the . Using this, allow the users to add telephone number.Note − The input type tel is only supported in Safari.ExampleYou can try to run the following code to learn how to use input type tel to allow user input in the form of a telephone number − HTML input search Details: Student Name Student Telephone
We're going to use the property of a BST to look up elements in it. Let us look at first an iterative implementation of search − ExamplesearchIter(data) { let currNode = this.root; while (currNode !== null) { if (currNode.data === data) { // Found the element! return true; } else if (data < currNode.data) { // Go Left as data is smaller than parent currNode = currNode.left; } else { ... Read More
The formnovalidate attribute in HTML is useful when you have a form with more than one submit button.The formnovalidate attribute overrides another attribute of the attribute, which is known as novalidate attribute. The novalidate attribute is also a Boolean attribute, but using it won’t validate the form of submission.Note − The formnovalidate attribute is not supported in Internet Explorer and Safari.ExampleYou can try to run the following code to learn how to use the formnovalidate attribute in HTML. If you will select the submit button with no validation, then the form won’t get validate − ... Read More
Submit button automatically submits a form on click. Using HTML forms, you can easily take user input. The tag is used to get user input, by adding the form elements. Different types of form elements include text input, radio button input, submit button, etc.To link a submit button to another webpage, use the form action attribute. Add the link in the attribute, for example − ExampleYou can try to run the following code to link a submit button to another webpage − Student Name: Student Subject:
In HTML, is used to create buttons in an HTML form. Inside the tag, you can place content like text or images. But, this is not the case with the buttons created with tag.Let’s see an example of button and ,HTML tagIt is used for creating a button within an HTML form and inside the tag, you can place content like text or images.The following will add an image to a button −ExampleYou can try to run the following code to add an image to a button using the tag − ... Read More
The autocomplete attribute is used with form element to set the autocomplete feature on or off. If the autocomplete feature is on, the browser will automatically show values, based on what users entered before in the field. If the autocomplete feature is off, the browser won’t automatically show values, based on what users entered before in the field.The following are the attribute values −S. NoAttribute ValueDescription1onThis is the default value. Browser automatically complete values based on what users entered before.2offBrowser won’t complete values based on what users entered before. Users have to type the value.Let’s see how to turn off autocompletion in ... Read More
Let us set up a simple class that we'll use to define all these methods on. We'll create a container object to store the hash table and create a display function to display the table. Note that for collision resolution, we'll use chaining.The display function takes each entry (hashed value) in the table and prints all pairs associated with it.ExampleWe'll also create a new class on the prototype to store the key-value pairs.class HashTable { constructor() { this.container = []; // Populate the container with empty arrays // which can ... Read More
When adding elements to a hash table the most crucial part is collision resolution. We're going to use chaining for the same. There are other algorithms you can read about here: https://en.wikipedia.org/wiki/Hash_table#Collision_resolutionNow let's look at the implementation. We'll be creating a hash function that'll work on integers only to keep this simple. But a more complex algorithm can be used to hash every object − Exampleput(key, value) { let hashCode = hash(key); for(let i = 0; i < this.container[hashCode].length; i ++) { // Replace the existing value with the given key ... Read More