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Javascript Articles
Page 88 of 534
How to convert JSON results into a date using JavaScript?
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 MoreHow to convert list of elements in an array using jQuery?
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 MoreHow to convert Object’s array to an array using JavaScript?
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 MoreHow to convert JavaScript datetime to MySQL datetime?
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 MoreHow to Enforce the type of the indexed members of a Typescript object
The programming language TypeScript is based on JavaScript and is strongly typed, object-oriented, and compiled. The language is improved with tools like static typing, classes, and interfaces that help with early error detection and make JavaScript more manageable. One of TypeScript's features is the ability to enforce the types of an object's indexed members, and this process is also referred to as an index signature. An index signature is a set of key-value pairs describing the many properties an object may have. The type of the property name and the type of the property value are specified, respectively, using the ...
Read MoreHow to Develop Generic Classes
Before developing the actual generic class, let's first learn about the Generic class. A TypeScript class known as generic may deal with numerous types of data. It is a variety of arguments and is displayed using angle brackets (). This represents the kind of data the class will use to achieve this. The type argument can then be used in the class's properties and functions to make the class flexible and reusable with other data types. We will be briefing a little bit. Suppose, in an example, the type parameter is denoted as "T" and the property "value" of the ...
Read MoreHow to solve too many try catch in Typescript?
We can use the try-catch statements to solve errors in TypeScript. Sometimes, we require adding more than one try-catch block in the code to handle multiple errors. When we add multiple try-catch statements in the code, the code becomes unreadable, and it becomes a headache for developers to refactor. In this tutorial, we will learn to convert too many try-catch blocks into a single try-catch block which can manage multiple errors. Syntax Users can follow the syntax below to use the single try-catch block in TypeScript. try { throw new Error("error_message"); // this code ...
Read MoreHow to create asynchronous function in TypeScript?
Asynchronous programming allows us to perform multiple tasks parallelly. We can use the async/await keyword to make the function asynchronous. Before we start, let’s learn the need for asynchronous programming and function. It takes some time to respond when we fetch data from the API. Now, think we need to use the results in our app, which we get from API. The single-threaded programming language like TypeScript and JavaScript never stops the execution of the code. So, It doesn’t wait for the response of the API and starts performing some operation on null values. When we make the function asynchronous, ...
Read MoreFind Hypotenuse of a Number In TypeScript
The longest side of a right-angled triangle and the side that faces away from the right angle is known as the Hypotenuse. The Pythagorean theorem explains that the Hypotenuse's square equals the sum of the squares of the other two sides. We can be used to determine it using this theorem. The formula representation for this theorem is c2 = a2 + b2, where c means the Hypotenuse and a and b are the triangle's two sides. When the lengths of the other two sides of a triangle are known, the Pythagorean theorem quickly determines the value of the Hypotenuse. ...
Read MoreDuck Typing in TypeScript
What is Duck Typing? First, we will know what Duck Typing is. According to programmers, the circumstance where an object's type is decided by its behaviour, like methods and attributes, rather than its class is known as "duck typing". Duck Typing in TypeScript The usage of interfaces in TypeScript makes duck typing possible. Where interface means the set of methods and characteristics an object must have to fall under that type are described. For example, if an interface defines the function, any object with the method called "myFunc()" may be treated as belonging to a specific kind, regardless of ...
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