How To Write Java Script – Whenever I finish building a project or look at old code, I always try to find ways to make it more readable. Ways to do this include writing React loops, wrapping repetitive code in subroutines, and more. may enter. In this article, I’ll share three common ways to moderate and improve the serviceability of your code. Let’s go inside.
This may be a bug for some, but TypeScript alleviates many of the issues that make the language unsafe in some cases. It also makes the goals of your code clearer. Let’s look at an example of a simple React component
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As props, a list of objects, each of which is displayed as a person
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. That’s all well and good, but what if one of the people is missing a seat? What if someone has
To solve this, but I think TypeScript offers a better solution. Let’s look at it the same way
If you’re familiar with Instant Useful Expressions (IIFEs), then you know how useful they are as a neat way to combine two statements into a single sentence. Suppose you wanted to initialize an array with external data:
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It returns an array containing the external data. Then we call the function and save the result
. There is nothing wrong with this code, but it could be written more efficiently, e.g.
It’s always important to isolate performance issues from your codebase, especially when working with scalable projects. It’s generally not a good idea for a worker to perform multiple tasks at the same time, especially if they are not related. Let’s analyze an example of a bad React component
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The component should be responsible for displaying data on the screen, not controlling external data. This creates a mess and makes it difficult to repair the part. Fortunately, we can fix this by writing a separate hook that contains the logic for creating the mail request. This hook will be a function that takes a url and options, makes a message request, and returns data like this:
The component is now only responsible for displaying data. By making these changes, the codebase became more secure.
If you made it here, thanks for reading! I hope you found this post informative. Enjoy the rest of your day. This 3-minute article gives you small and simple coding practices that will help you keep your code readable and consistent.
Javascript Tips: How To Write Clean Functions
It seems obvious, right? Just a few other comments, nothing to improve. Well, it’s time to take coding to a new level.
By “magical” I mean unique values with undefined meaning, or multiple expressions that can be replaced (if possible) by named constants.
I recommend using TypeScript to add a robust type checker that greatly reduces type errors and lets you spot errors in your editor right away. (In our case Enums would be more suitable) Avoid nested if-statements
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Nested if-statements are hard to read. So the next trick for us is to break it down somehow. It’s easy
Now with this simple change our code is much more readable. There are no other reports. The return statement stops the execution of the function, so it suits our needs. That looks neat!
Hmmm, but I’m still not satisfied. Others – if reporting is required… How would I know.
How Javascript Works: Inside The V8 Engine + 5 Tips On How To Write Optimized Code
A little juicing trick for those who want to go a little further. The log method of the Console object is a function that returns undefined. You can check it in your browser’s developer tools
And this is the final code that looks pretty neat. Compare the code of spoken words at the top of the article and enjoy!
The purpose of this article was to help you understand that even small and simple sections of code can be extended if we use the basic principles of a programming language.
A Guaranteed Method For Writing Testable Code In Javascript
Now you’re ready to code like a pro, so start troubleshooting ✌🏻When it comes to programming in JavaScript, there are many options to choose from. On the other hand, we have a version that focuses on immutability and pure functionality while using an object-oriented (OO) approach to design. On the other hand, we have a strictly written non-functional programming style that doesn’t allow any OO concepts at all. This series of articles will focus more on the latter. Writing from scratch like this can be a daunting task. We can easily do this by using a library like Sanctuary in our project.
Welcome to Part 8 of the JavaScript Developer Workshop. Today we’re going to focus on setting up the actual development by introducing you to Sanctuary, written primarily by David Chambers.
Sanctuary is a JavaScript library targeting a strongly typed version of the operating system. It does this by leveraging features that already exist in JavaScript. So no need for Webpack or other compilers. You simply add the library to your project and you’re good to go.
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The sanctuary is typical of Fantasyland. Therefore, you can be sure that it follows all the rules of algebraic structures.
Initially, this is the only part you will need. In short, the main sanctuary library (henceforth referred to as “Sanctuary”) is a useful library for working with data.
If you’ve ever played with Ramda, think of Sanctuary as Ramda on steroids when typing safety. If you provide the function with an error type, an understandable error is returned that indicates where the error occurred. Here is an example:
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. The advantage of this approach is that bugs can be caught during development rather than after shipping to production.
? If you’ve read the previous articles in this series, you’ve probably already guessed. But what happens if we pass a function with a valid type, such as an empty array, whose first element cannot be found? Other libraries like Ramda may return
In addition to having all these useful functions, it is useful to know that they are all false and, of course, pure.
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So how does Sanctuary feel about its genre? Anyway, we didn’t use TypeScript or anything like that. Well, that’s it
Included; JavaScript runtime class program. Therefore, it is not only used in the Holy Land. You can use it to test the functions you write.
I recommend using holy-def only during development. Because, as you might have guessed, runtime type checking pays off in performance. So it is recommended to disable it while in production. Fortunately, this is easy to do.
How To Use Object Literals In Javascript To Write Complex Conditions?
Sets a performance level for them. Sanctuary uses this library to provide the correct category.
Additionally, we can use this library to define custom data types. suppose you want to create a data type that follows the rules of
There are several other locations in the library. But I think we covered the most important ones. If you’re interested, I suggest you head over to his GitHub site and take a look.
Understand And Write Javascript Like A Pro
JavaScript is a dynamic language. A great responsibility rests on your shoulders not to confuse species. After years of working with JavaScript, I have yet to see a project that addresses this issue. Of course, there are ways to make it type-safe, such as switching to TypeScript. And I am happy to say that it solves many problems. But for me, as a JavaScript purist, nothing works better than Sanctuary.
Sacred forces you to write in an easily verifiable way because it breaks each problem into smaller parts in the form of neat tasks. Since the library comes with a type checking toolkit, I see no reason to add complexity to changing the JavaScript language.
Because Sanctuary forces us to write functionality, code refactoring becomes an easy task. This is one of the biggest advantages of writing clean code.
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In general, the main reason for using sacred land is for security. As the project grows and the number of developers increases, there are more bugs. Unfortunately, this is the bitter truth. But due to the arguments described above, we have a way to significantly increase the security of our code.
As an active program evangelist, I often participate in many discussions on the topic. I would like to share with you some arguments against using Sanctuary. Frankly, it’s not the Holiness itself that sparks the discussion. This is more of a discussion of work style. I present my opinion against these arguments.
I agree that learning functional programming can be difficult. But looking at the big picture, it is
