JAVA SCRIPT STRUCTURE

I was astounded by JavaScript's versatility when I first started working with it; it allowed me to handle asynchronous operations and manipulate the DOM with only a few lines of code. The fact that JavaScript functions are first-class citizens and can be passed around like any other variable was among the first things I learnt. When working with higher-order functions like map, filter, and reduce, this idea becomes quite potent. For instance, map() is your go-to tool if you have an array of numbers and you wish to double each value: doubled const = numbers. map(n => n * 2); — it is clear, succinct, and dynamic. However, it doesn't end there. As I learned more, I came to understand the power of closures. When a function retains the variables from its lexical scope even when it is run outside of it, this is known as a closure. For example, when a function is defined inside another function and then returned, the variables of the outer function are still accessible to the inner function. The function carries a number of variables, much like a backpack. Here's a brief illustration: function inner() { count++; return count; } } function outer() { let count = 0; return function inner() { count++; return count; } } — count is increased each time you execute the inner function, even if outer has already completed running. JavaScript seems to be violating the laws of time and space. Then there is the async-await paradigm, which, of course, made handling asynchronous logic much easier than chaining. then() makes incessant calls. It almost feels synchronous to write something like const data = await fetch(url); inside an async function, even if it's doing a task that previously required several callbacks. Speaking of which, it is essential to comprehend the event loop in order to write code that is both efficient and free of errors. Because of this, JavaScript seems to be single-threaded even though it uses callbacks, promises, and microtasks to manage tasks in the background. My logic structure altered when I discovered that setTimeout(() => console.log('Hi'), 0); still doesn't run right away if there are synchronous tasks obstructing the queue. I also gained a profound understanding of JavaScript objects and their dynamic manipulation capabilities over time. Do you want to quickly add a property? You simply do obj.newProp = value;. Or perhaps use for...in or even Object.keys() to cycle through properties—it's that versatile. In addition, my code became much more clear because to destructuring and the spread/rest operators. JavaScript now seems like a sophisticated, expressive language that can be used for both frontend and backend development with Node.js thanks to the combination of these with ES6 classes and modules. To put it briefly, JavaScript is now more than just the language of the browser; it's a language that develops with you. It's peculiar, occasionally annoying, but eventually satisfying after you become proficient in its vernacular.