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PHP tags with single or double quotes assign a PHP value to a JavaScript variable when setting a PHP variable. Several times you might need to put PHP variable values in JavaScript. You may easily echo on the JS variable with a PHP tag if there are only simple variables, such as a string or any integer. Understanding the sequence of actions when you access a PHP website is necessary before passing a variable from PHP to JavaScript. To create the HTML, the PHP will first run your.php file. Your code will be delivered to the client's browser when PHP ... Read More
This tutorial will teach us how to create a function with arguments but without a return value. This tutorial involves a gist about the function, and syntax for the function with argument and without return type in Golang, then last we will see two different examples of a function with arguments but without a return type. In the first example, we are going to print the argument passed in the function with the respective statement. In the other example, we are going to add the numbers passed as arguments and print the sum in the same function. Function with argument ... Read More
TypeScript is a type-strict language in which we need to define the type for every variable. Also, we need to define the return type of the function and the types of parameters of the function. The never is also one of type in TypeScript like other data types such as string, number, boolean, symbol, etc. We can use the ‘never’ keyword to make a variable of never type. Users can use the never type when they are sure about any situation that will never occur. For example, we can use the never as a return type when we are sure ... Read More
In any programming language, we use the loops to execute the same code block repeatedly or multiple times. The loops allow us to write less code to execute the same code block many times. The for loop is one of the loops in TypeScript. As given below, there are also three different sub-types of the for loop in TypeScript. Normal for loop for-of loop for-in loop We will learn about all variants of the for loop in this TypeScript tutorial. Also, we will learn how each type of for loop is different from others. Introduction to normal for ... Read More
We will learn about the tuple types in TypeScript. In JavaScript, an array can contain elements of different data types. Still, as TypeScript is a superset of JavaScript and type-strict language, a TypeScript array can contain only single types of elements. So, the tuple allows us to store elements of the different data types in the TypeScript array. Also, when we store elements inside the tuple, the order of elements is important; Otherwise, the TypeScript compiler can generate an error while compiling the code. Syntax You can follow the syntax below to define the tuples in TypeScript. let sample_tuple: [string, ... Read More
The Symbol is introduced in the last main revision of JavaScript, ES6. The Symbol is a data type. As we use the number, string, or Boolean to create the variables of different data-type, we can use the symbol type to create the Symbol. Using the symbol types has many benefits as it provides more features than other data types. In this tutorial, we will learn about the basics of the Symbol and its different uses of the Symbol. Syntax Users can follow the syntax below to create a variable of symbol data type. let test_symbol = Symbol(); let key_symbol = ... Read More
We will learn to extract unique objects by attribute from an array of objects in this tutorial. Sometimes, we need to filter objects from the array of objects based on a particular attribute. For example, we have an id as a key to identify the object. So, we need to ensure that the array contains only a single object with a single id. If two or more objects contain the same primary key value, it can cause the problem of uniquely identifying objects. Here, we will learn different approaches to filter all unique objects from the array based on a ... Read More
In JavaScript, various scopes allow us to access the functions and variables from different places in our code. We will learn about the function scope in this tutorial. Also, we will explore the different types of function expressions in JavaScript. Function Scope When we create a new function in JavaScript, it also creates the scope for that particular function. It means that whatever variables we declare inside the function or define the nested function inside it, we can only access it inside the function block. If we try to access the variables defined inside the function block from outside the ... Read More
This tutorial will teach about the ‘in’ operator in JavaScript. There are many operators available in JavaScript, such as arithmetic operators to perform mathematical operations, assignment operators, equality operators, etc. The ‘in’ operator is also one of them, which we can use to find properties from the object. Before we start, let me ask you a question. Have you ever needed to check for the existence of the object's properties while coding with JavaScript? If yes, how did you deal with it? The answer is simple you can use the ‘in’ operator, which returns the Boolean value based on whether ... Read More
There are mainly two programming paradigms: The imperative programming paradigm and the declarative programming paradigm. Functional programming is a subtype of the declarative paradigm. The paradigm word refers to the approach to solving a particular problem. Functional programming has been in use for the last decades but came in the trend after 2015 when the last main revised version of JavaScript was released. There are many benefits to using functional programming, which we will discuss in this tutorial. Different Concepts of Functional Programming and their benefits Functional programming works as mathematical function works. It allows developers to develop software based ... Read More