Giles  Goodwin

Giles Goodwin

1603857900

4 Ways You Can Get Rid of Dirty Side Effects for Cleaner Code in JavaScript

According to an analysis, a developer creates 70 bugs per 1000 lines of code on average. As a result, he spends 75% of his time on debugging. So sad!

Bugs are born in many ways. Creating side effects is one of them.

Some people say side effects are evil, some say they’re not.

I’m in the first group. Side effects should be considered evil. And we should aim for side effects free code.

Here are 4ways you can use to achieve the goal.

1. use strict;

Just add use strict; to the beginning of your files. This special string will turn your code validation on and prevent you from using variables without declaring them first.

#functional-programming #javascript-tips #clean-code #coding #javascript-development #javascript

What is GEEK

Buddha Community

4 Ways You Can Get Rid of Dirty Side Effects for Cleaner Code in JavaScript
Giles  Goodwin

Giles Goodwin

1603857900

4 Ways You Can Get Rid of Dirty Side Effects for Cleaner Code in JavaScript

According to an analysis, a developer creates 70 bugs per 1000 lines of code on average. As a result, he spends 75% of his time on debugging. So sad!

Bugs are born in many ways. Creating side effects is one of them.

Some people say side effects are evil, some say they’re not.

I’m in the first group. Side effects should be considered evil. And we should aim for side effects free code.

Here are 4ways you can use to achieve the goal.

1. use strict;

Just add use strict; to the beginning of your files. This special string will turn your code validation on and prevent you from using variables without declaring them first.

#functional-programming #javascript-tips #clean-code #coding #javascript-development #javascript

Rahul Jangid

1622207074

What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");
</script>

How to comment JavaScript code?

  • For single line comment in JavaScript we have to use // (double slashes)
  • For multiple line comments we have to use / * – – * /
<script type="text/javascript">

//single line comment

/* document.write("Hello"); */

</script>

Advantages and Disadvantages of JavaScript

#javascript #javascript code #javascript hello world #what is javascript #who invented javascript

Tyrique  Littel

Tyrique Littel

1604008800

Static Code Analysis: What It Is? How to Use It?

Static code analysis refers to the technique of approximating the runtime behavior of a program. In other words, it is the process of predicting the output of a program without actually executing it.

Lately, however, the term “Static Code Analysis” is more commonly used to refer to one of the applications of this technique rather than the technique itself — program comprehension — understanding the program and detecting issues in it (anything from syntax errors to type mismatches, performance hogs likely bugs, security loopholes, etc.). This is the usage we’d be referring to throughout this post.

“The refinement of techniques for the prompt discovery of error serves as well as any other as a hallmark of what we mean by science.”

  • J. Robert Oppenheimer

Outline

We cover a lot of ground in this post. The aim is to build an understanding of static code analysis and to equip you with the basic theory, and the right tools so that you can write analyzers on your own.

We start our journey with laying down the essential parts of the pipeline which a compiler follows to understand what a piece of code does. We learn where to tap points in this pipeline to plug in our analyzers and extract meaningful information. In the latter half, we get our feet wet, and write four such static analyzers, completely from scratch, in Python.

Note that although the ideas here are discussed in light of Python, static code analyzers across all programming languages are carved out along similar lines. We chose Python because of the availability of an easy to use ast module, and wide adoption of the language itself.

How does it all work?

Before a computer can finally “understand” and execute a piece of code, it goes through a series of complicated transformations:

static analysis workflow

As you can see in the diagram (go ahead, zoom it!), the static analyzers feed on the output of these stages. To be able to better understand the static analysis techniques, let’s look at each of these steps in some more detail:

Scanning

The first thing that a compiler does when trying to understand a piece of code is to break it down into smaller chunks, also known as tokens. Tokens are akin to what words are in a language.

A token might consist of either a single character, like (, or literals (like integers, strings, e.g., 7Bob, etc.), or reserved keywords of that language (e.g, def in Python). Characters which do not contribute towards the semantics of a program, like trailing whitespace, comments, etc. are often discarded by the scanner.

Python provides the tokenize module in its standard library to let you play around with tokens:

Python

1

import io

2

import tokenize

3

4

code = b"color = input('Enter your favourite color: ')"

5

6

for token in tokenize.tokenize(io.BytesIO(code).readline):

7

    print(token)

Python

1

TokenInfo(type=62 (ENCODING),  string='utf-8')

2

TokenInfo(type=1  (NAME),      string='color')

3

TokenInfo(type=54 (OP),        string='=')

4

TokenInfo(type=1  (NAME),      string='input')

5

TokenInfo(type=54 (OP),        string='(')

6

TokenInfo(type=3  (STRING),    string="'Enter your favourite color: '")

7

TokenInfo(type=54 (OP),        string=')')

8

TokenInfo(type=4  (NEWLINE),   string='')

9

TokenInfo(type=0  (ENDMARKER), string='')

(Note that for the sake of readability, I’ve omitted a few columns from the result above — metadata like starting index, ending index, a copy of the line on which a token occurs, etc.)

#code quality #code review #static analysis #static code analysis #code analysis #static analysis tools #code review tips #static code analyzer #static code analysis tool #static analyzer

A 4-Step Guide to Help Beginners Get Started on Coding Projects

Starting something new is always difficult. When I working on my first coding project, I was wondering where to begin. I wondered what technologies I should use and whether I would come up with a good project idea. Today we will be going over my beginner’s guide to coding projects. I want to help you answer the same questions I asked myself when I worked on my first project. This will be especially helpful for people with little to no experience working on coding projects. If this post is helpful, please consider subscribing to my YouTube channel or check out my other articles for more content like this!

If you do not have any experience coding, that is completely fine! I recommend you take one of these free, online courses that will teach you the fundamentals of programming and a programming language: Java (commonly used to develop Android apps, web backends, etc.), Python (commonly used for data science and backend web development), HTML + CSS + JavaScript (used for frontend and backend web development).

1. Identify Your Technologies

I recommend mostly using technologies you are familiar with. You can use at most one or two new technologies. This will add some challenge to the project to encourage you to pick them up as you go, but will not overwhelm you such that you will not be able to make progress. In addition to establishing technologies, you also want to decide on the format of the project. This could be a web app, mobile app, database project, etc — this may also influence what technologies you need to use.

2. Come Up With an Idea

I recommend keeping things simple here. When I was working on my first project, I would keep questioning my ideas. I kept trying to build something innovative, but eventually, I understood that this was not the goal of the project. I should not judge the success of this project on how many users I have or whether I can build the next billion dollar company with it. The goal of this project is for you to learn and so long as you achieve that, the project is a success. Some common ideas for a first project include a personal website, simple mobile app, or following a tutorial and building on top of that.

3. Work on the Project

You need to find what motivates you to work on the project. You want to be working on it regularly. Also, you will inevitably get stuck trying to figure something out or debugging your project. It is important to remember that everyone faces this and that there are plenty of resources out there to help. For example, simply searching the question you have or the error message you received can yield answers. Websites such as Stack Overflow were built to allow the community to help coders who are encountering a blocker. Use these sites to get unblocked and you will be on your way to completing that project.

4. Share Your Project on GitHub

GitHub is a website that allows anyone to view and collaborate on open source projects. GitHub splits these up into repositories of files that make up the project itself. If you have never used git (a version control system) or GitHub, then I recommend reading this guide which will run you through the basics.

Once your project is complete, you should put up your project in one or more repositories on GitHub. This helps for two main reasons. First, you can easily share your projects with others. All it takes is sharing the link to your GitHub profile on your resume for recruiters, hiring managers, interviewers, and more to view your projects. Second, if you are working on a website, GitHub pages takes care of hosting the website for you. All you need to do is upload your files to a GitHub repository, set it up with GitHub pages, and your website will be published at .github.io.

Source of Image

I hope you found this story informative! Please share it with a friend you think might benefit from it as well! If you liked the post/video, feel free to like and subscribe to my YouTube account and check out my other articles for more content like this. Also, follow me on Twitter for updates on when I am posting new content and check me out on Instagram. I hope to see you all on the next one!

If you prefer to follow along via my YouTube video, you can watch it here!

#side-project #project-planning #programming #coding #side-projects #build-a-side-project #how-to-start-coding-projects #self-improvement

jack son

jack son

1610638240

4 Wheel Parts Coupon Code Military Offers To Save 50% Off

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#4 wheel parts promo codes #4 wheel parts coupon code #4wparts #4wheelparts promo code #4 wheel parts promo code