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We can use the logical OR operator, double bitwise NOT operator, strict equality operator, or the inNaN() function to convert NaN to 0 using JavaScript. NaN in Javascript means Not a Number, whose type is Number but actually, it is not a number. In this article, we will learn to approaches to convert NaN to Boolean. Using the Logical OR (||) Operator Using the Double Tilde (~~) Operator Using the Strict Equality (===) Operator Using the isNaN() function Using the Logical OR (||) Operator The logical OR (||) operator is used to check the truthiness of ... Read More
There are different ways to convert a map keys to an array in JavaScript. You can use the map keys() method to access the keys in a map and then apply the Array form() method to create an array of the accessed keys. You can also apply the spread operator instead of the Array form() method to create an array of key. You are given a javascript Map and the task is to convert the Map’s keys into array. Here is the example given below Given Map − { 1: "India", 2: "Russia", 3: "USA", 4: "Japan", 5: ... Read More
JSON is a powerful data format to exchange data from server to client and vice versa. Many time JSON data is received in a String format and we need to convert it to a usable JSON object. In this process, it’s an important requirement to convert string data into Date format. In this article, we will learn how to convert JSON results into a Date string using Javascript. The JSON objects contain the date like this − { name: "John", time: '/Date(1559072200000)/' } And the result will be − Wed May 29 2019 ... Read More
We can use jQuery.makeArray() method or jQuery.each() method to convert a list of elements into an array using jQuery. The makeArray() method is most convenient way to perform this task. This method is used to convert an object into a native array. Using jQuery makeArray() method The $.makeArray() method in jQuery converts an array-like object into a JavaScript array. It takes a single argument and convert it to array. The following is syntax of $.makeArray() method- $.makeArray(obj) Here obj is an object that we want to convert to an array. Here are the steps ... Read More
We can use the Object.values() method, Array puch() method and for…of loop to convert Object’s array to an array using JavaScript. First we access each object using for…of loop and then apply the Object.values() method to access the values of individual object. Then use the Array push() method to add the values to the array. In this article, we will discuss in this approach in detail. Let’s have a look at the example to get an understanding about the problem. You have given an array of objects and the task is to convert the array of object into array ... Read More
In Angular, directives are one of the most important elements. Directives are building blocks like components in angular framework to build application. A directive used to modify the DOM by changing the appearance, behavior, or layout of DOM elements. Directives are used to provide or generate new HTML based syntax which will extend the power of the UI in an Angular Application. Each and every directive must have a selector same like a component. In simple words, every component in angular is a directive with the custom HTML template. In angular, we have directives to change the behavior or ... Read More
Date time manipulation in JavaScript is important while dealing with databases. JavaScript Date and time are different from the MySQL date and time. JavaScript provides multiple ways to represent Date and time none of these formats are the same as MySQL's date and time format. In this article, we will discuss some approaches to converting JS date and time into MySQL date and time format. First of all, we will understand the difference between Javascript and MySQL date and time formats. Here is an example − Javascript − ISO 8601 Date Format : YYYY-MM-DDTHH:mm:ss.sssZ MySQL − ISO ... Read More
In AngularJS, events help us to perform particular tasks, based on the action. AngularJS is rich in events and has a simple model for adding event listeners to the HTML. AngularJS supports many events related to the mouse and keyboard. All these events are applied to the HTML elements. In angularJs, we have many HTML events. Suppose we write both AngularJS and HTML events simultaneously. AngularJS event and HTML event will be executed and AngularJS event will not overwrite the HTML event. Events can be represented by using directives. Like ng-click, ng-change, ng-mousedown, ng-mouseup, ng-keydown, ng-keyup, ng-keypress, ng-mouseover, ng-paste etc. ... Read More
The fabric.Text is used to change the corner style of a canvas-type text. Text class of Fabric.js provides text abstraction by using the fabric.Text class, which allows us to work with text in an object-oriented way. Compared to the canvas class the Text class provides the rich functionality. The text object contains the different properties, but to change the background color and rendering the text of canvas can be done using one of the color property i.e., textBackgroundColor. By defining the value for the color property we change the background color. Syntax The following is the syntax for the fabric.Text ... Read More
The Circle class of Fabric.js which is used to provide the circle shape by using the fabric.Circle object. The Circle object is used to provide the circle shape, and the circle is movable, and it can be stretched according to the requirements. For the stroke, color, width, height, and fill color the Circle is customizable. Comparing to the canvas class the Circle class provides the rich functionality. Here, we are using the backgroundColor property of Circle object for changing the background color of a canvas circle. We can change the background color by defining the value for the property. Syntax ... Read More