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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to remove controls of a text canvas using Fabric.js?
Fabric.js is a powerful tool written in JavaScript that makes it easier to build applications with interactive and dynamic graphics using HTML5 canvas. It offers many useful features, including the ability to add controls such as resizing and rotation handles to objects on the canvas. Sometimes, though, you might want to take away these controls from certain objects, like text, to limit what users can do. In this article, we'll show you how to remove controls from a text canvas using Fabric.js, using a simple example that you can follow along with. How to Remove Controls of a Text? To ...
Read MoreHow to pass data into a bootstrap modal?
Bootstrap is a CSS framework allowing developers to style HTML elements without writing any CSS code. We can use pre-defined classes of Bootstrap with HTML elements to style them. The Bootstrap also contains the modal. The simple meaning of the modal is the pop-up box. For example, an alert box, payment box, etc. In this tutorial, we will learn to add data to the bootstrap modal using JavaScript or JQuery. One scenario when we require to add data to the bootstrap modal is that we allow users to select any product. After that, we need to open a payment modal ...
Read MoreHow to place two input box next to each other using Bootstrap 4?
Bootstrap is a popular frontend framework containing pre-styled components and allowing developers to use that directly in the application. The ‘4’ is the version of the Bootstrap. Bootstrap also contains pre-styled input components. Furthermore, it has different kinds of the input components, such as input groups, single input, etc. While creating a form, if we require to add 10s of inputs in the form, we can put some input fields side by side, such as first name and last name we can put side by side. In this tutorial, we will use Bootstrap to place two input boxes next to ...
Read MoreHow to perform jQuery Callback after submitting the form?
Nowadays, every website contains at least a single form, such as a contact form, application form, etc. It is also required to notify users when the form is submitted successfully or with errors so that users can take action again. In JQuery, we can use the submit() method to call the callback function after submitting the form. However, we can also save form data to the database in the callback functions. So, there can be many use cases where we must call the callback function after submitting the form to perform the particular operations. Syntax Users can follow the syntax ...
Read MoreMinimum characters to be replaced in Ternary string to remove all palindromic substrings for Q queries
A palindromic string is a string that is equal to its reverse string. We are given a string that contains ‘0’, ‘1’, and ‘2’ and an array Q of length N and each index of the given array indicates a range in the form of pairs. We have to find the minimum number of characters that are needed to replace in the given range such that none of the palindromic substrings remains in that range. Sample Example Input1: string s: “01001020002”, int Q = {{0, 4}, {2, 5}, {5, 10}}; Output: 1 1 3 Explanation For the range ...
Read MoreMaximize given function by selecting equal length substrings from given Binary Strings
Two binary strings str1 and str2 of the same length are given and we have to maximize a given function value by choosing the substrings from the given strings of equal length. The given function is such that − fun(str1, str2) = (len(substring))/(2^xor(sub1, sub2)). Here, len(substring) is the length of the first substring while xor(sub1, sub2) is the xor of the given substrings as they are binary strings so it is possible. Sample Examples Input1: string str1 = 10110 & string str2 = 11101 Output: 3 Explanation We can choose a lot of different sets of strings ...
Read MoreMinimum number of adjacent swaps to reverse a String
A string str is given and we can swap only adjacent characters to make the string reverse. We have to find the number of minimum moves required to make the string reverse just by swapping the adjacent characters. We will implement two approaches to find the required solution with the explanation and the implementation of the code. Sample Examples Input1: string str1 = “shkej” Output: 10 Explanation First, we will take the last character to the first position which will take 4 swappings, and then the string will be “jshke”. Then we will move ‘e’ to the second ...
Read MoreMinimum count of prefixes and suffixes of a string required to form a given string
Prefixes are the substring from the given string that starts from the zeroth index and can go up to length 1 to the size of the string. Similarly, the suffix is the substring of any length 1 to the size of the string and ends at the last index. We will be given two strings and have to create the first string by using any number of prefixes and suffixes of the second string in any way. If it is not possible to create the given string from the given methods then we will return -1. Sample Examples Input 1: ...
Read MoreEncrypt the string
Encryption is the technique to change the data by using some techniques or certain steps so it changes to another information or the previous information cannot be gathered from it directly. For encryption, we have to follow certain steps that are fixed for a particular type of encryption. In this problem, we will be given a string and we have to encrypt it by following the given steps − First, we have to get all the substring that contains the same characters and replace that substring with a single character followed by the length of the substring. Now, change ...
Read MoreCount of 3 length strings using given characters containing at least 2 different characters
Three integers are given to us ‘a’, ‘b’, and ‘c’ represents the frequency of the three different characters ‘A’, ‘B’, and ‘C’. We have to find the number of different strings that can be formed by using these characters and there must be at least two different characters present in the string formed. We will see two approaches for this problem one is the naive approach and another is the mathematical approach. Sample Examples Input 1: a = 3, b = 2, c = 4 Output: 3 Explanation We can create three strings ‘ABC’, ‘ABC’, ...
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