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In this article, we will learn how to write a swift program to interchange the elements of first and last in a matrix across columns. Therefore, to interchange the elements we need to swap the elements of the first column with the elements of the last column of the given matrix. For example − Original matrix: 2 4 5 6 3 4 6 2 6 7 7 2 1 1 1 1 So after swapping the first and last column we get: 6 4 5 2 2 4 6 3 2 7 7 6 1 1 1 1 ... Read More
In this article, we will learn how to write a swift program to display lower triangular matrix. Lower triangular matrix is a matrix in which all the elements above primary diagonal are zero. As shown in the below image: $$\mathrm{\begin{bmatrix} 1 & 0 & 0 & 0 & 0 & 0ewline 3 & 5 & 0 & 0 & 0 & 0ewline 1 & 4 & 6 & 0 & 0 & 0ewline 1 & 2 & 2 & 2 & 0 & 0ewline 4 & 5 & 6 & 1 & 2 & 0ewline 1 & 1 & 1 ... Read More
In this article, we will learn how to write a swift program to calculate averages using an array. Average is defined as the ratio of the sum of the elements present in the given sequence to the total number of elements available in the given sequence. The general formula of average is − Average = (p1+p2+p3+..+pn)/n Here we use the following methods to calculate the average using array − Using pre−define functions Without using predefine functions Method 1: Using Pre-Define Functions To find the average of the given array, we use reduce() method to find the sum ... Read More
JSON, or JavaScript Object Notation, is a simple format for exchanging data. It is a human−readable and machine−understandable format. It is based on a portion of Standard ECMA−262, Third Edition, December 1999's JavaScript Programming Language. Despite using conventions recognizable to programmers of the C family of languages (C, C++, Java, JavaScript, Perl, Python, and many others), JSON is a text format fully independent of the programming language. JSON is the best language for exchanging data due to its characteristics and simplicity. AJAX is a method of web development used to build interactive web applications. Web pages can request data from ... Read More
The ES6 is the latest JavaScript version which was introduced in 2015. We will learn about all the features of RegExp means regular expression, which Es6 contains. What is the Regular Expression and Usage of it The regular expression is a string representing the particular search pattern containing the different characters, such as numeric, alphabetic, and special characters. Let’s understand the real−time usage of regular expression. We hope you all have filled out any form in the past and seen particular form field validation errors. For example, if you don’t enter the email with the ‘@’ character or enter a ... Read More
Promise.allSettled() is a method that takes an iterable of promises as an argument and returns a promise that is fulfilled when all of the promises in the iterable have been settled, meaning that they have either been fulfilled or rejected. When the returned promise is fulfilled, it is resolved with an array of objects containing information about the fulfilled or rejected promises. Each object has a status property, either fulfilled or rejected, and a value or reason property, respectively. For example, if you have an array of promises that represent network requests and want to know each request's status (whether ... Read More
Simple operations like adding two numbers or string manipulation codes execute sequentially in JavaScript and return the results instantly. But while coding for real−world applications, we frequently make time−taking calls to databases, APIs, and other applications. These longer calls don’t return the results instantly; they will rather return a promise. A promise is an object to represent the future results of an asynchronous operation. It is used to handle asynchronous processes' eventual success or failure. For instance, if you request some object from an API in JavaScript, you will be given a promise that the task will eventually be complete ... Read More
We will learn about the Promise.race() method in this tutorial. As the name of the race() method suggests, promises passed as a parameter of the race() method do the race to execute. So, Whichever promise will be resolved first, will be executed only by the race() method, and other promises will never be executed. Promise.race() The Promise.race method in JavaScript allows you to wait for the first of a set of promises to be fulfilled or rejected, and to handle the result or error that occurs. It returns a promise that is fulfilled or rejected as soon as one of ... Read More
We will learn about any() method of the promise in this tutorial. In JavaScript, we can use the promises to handle the asynchronous request. Writing the asynchronous code in our application to fetch the data makes it faster as it executes the other code without waiting for the data. Promise.any() Method As the name of any() method suggests, it will execute any promise fulfilled. So, whichever promise will resolve first, will be executed by the promise.any() method and others may or may not be executed. Also, all rejected promises were never executed by the promise.any() method. SyntaxUsers can follow the ... Read More
We can show the popup message to the app users using the popup box. We will learn about the different types of JavaScript popup boxes in this tutorial. There are three different types of popup boxes available in JavaScript below. Alert box Confirm box Prompt box We will learn about all popup boxes one by one below. Alert Box We can show the alert box using the window.alert() method. It simply shows the message in the popup box. We can use the alert box when we need to give some message to the users. For example, when the ... Read More