1594089023
Top 15 Simple Coding Techniques to Get Your Tasks Done with Shorter Code in JavaScript
Everyone has twenty-four hours a day.
We cannot create more time than that number but we can use it efficiently every single second.
One way to do this is to shorten your code with the following 15 techniques.
1. Declaring Variables Shorthand
If it does not make sense, don’t declare each variable on every single line. One line is enough, save your spaces.
Instead of:
let name;
let price = 12;
let title;
let discount = 0.3;
Do this:
let name, price = 12, title, discount = 0.3;
2. Condition Shorthand
I think this is so obvious but as long as it serves the subject, I put it in.
Instead of:
if (isUsernameValid === true) {}
if (isExist === false) {}
Do this:
if (isUsernameValid) {}
if (!isExist) {}
3. Using Decimal Base Exponent
1000000 can cause some bugs if you miss one or two zero. The more zero in the tail, the more attention you have to pay. Fortunately, you don’t have to do that. Instead of writing 1000000, you can just shorten it to 1e6. The 6 represents the number of zeros in the tail.
Instead of:
let length = 10000;
for (let i = 0; i < length; i++) {}
Do this:
let length = 1e4;
for (let i = 0; i < length; i++) {}
4. Default Parameters
Sometimes you have to define a function with multiple parameters. Do you need to pass all the parameters values every time you invoke the function? Not really if you initialize the default values.
Instead of:
let generateBookObject = (name, price, discount, genre) => {
let book = { name, price, discount, genre };
return book;
};
let book = generateBookObject(‘JavaScript’, 12, 0.3, ‘Technology’); // { name: ‘JavaScript’, price: 12, discount: 0.3, genre: ‘Technology’ }
Do this:
let generateBookObject = (name = ‘JavaScript’, price = 12, discount = 0.5, genre = ‘Technology’) => {
let book = { name, price, discount, genre };
return book;
};
// In case discount and genre are the same as the default values, you don’t need to pass them to the function
let book = generateBookObject(‘JavaScript’, 12); // { name: ‘JavaScript’, price: 12, discount: 0.5, genre: ‘Technology’ }
5. Ternary Operator
If there’s only one else in the conditional statement, shrink it to one line using ternary.
Instead of:
let name = ‘Amy’;
let message;
if (name === ‘Amy’) {
message = ‘Welcome back Amy’;
} else {
message = ‘Who are you?’;
}
Do this:
let name = ‘Amy’;
let message = name === ‘Amy’ ? ‘Welcome back Amy’ : ‘Who are you?’;
#programming #coding #javascript #javascript-tips
What is GEEK
Buddha Community
1594089023
Top 15 Simple Coding Techniques to Get Your Tasks Done with Shorter Code in JavaScript
Everyone has twenty-four hours a day.
We cannot create more time than that number but we can use it efficiently every single second.
One way to do this is to shorten your code with the following 15 techniques.
1. Declaring Variables Shorthand
If it does not make sense, don’t declare each variable on every single line. One line is enough, save your spaces.
Instead of:
let name;
let price = 12;
let title;
let discount = 0.3;
Do this:
let name, price = 12, title, discount = 0.3;
2. Condition Shorthand
I think this is so obvious but as long as it serves the subject, I put it in.
Instead of:
if (isUsernameValid === true) {}
if (isExist === false) {}
Do this:
if (isUsernameValid) {}
if (!isExist) {}
3. Using Decimal Base Exponent
1000000 can cause some bugs if you miss one or two zero. The more zero in the tail, the more attention you have to pay. Fortunately, you don’t have to do that. Instead of writing 1000000, you can just shorten it to 1e6. The 6 represents the number of zeros in the tail.
Instead of:
let length = 10000;
for (let i = 0; i < length; i++) {}
Do this:
let length = 1e4;
for (let i = 0; i < length; i++) {}
4. Default Parameters
Sometimes you have to define a function with multiple parameters. Do you need to pass all the parameters values every time you invoke the function? Not really if you initialize the default values.
Instead of:
let generateBookObject = (name, price, discount, genre) => {
let book = { name, price, discount, genre };
return book;
};
let book = generateBookObject(‘JavaScript’, 12, 0.3, ‘Technology’); // { name: ‘JavaScript’, price: 12, discount: 0.3, genre: ‘Technology’ }
Do this:
let generateBookObject = (name = ‘JavaScript’, price = 12, discount = 0.5, genre = ‘Technology’) => {
let book = { name, price, discount, genre };
return book;
};
// In case discount and genre are the same as the default values, you don’t need to pass them to the function
let book = generateBookObject(‘JavaScript’, 12); // { name: ‘JavaScript’, price: 12, discount: 0.5, genre: ‘Technology’ }
5. Ternary Operator
If there’s only one else in the conditional statement, shrink it to one line using ternary.
Instead of:
let name = ‘Amy’;
let message;
if (name === ‘Amy’) {
message = ‘Welcome back Amy’;
} else {
message = ‘Who are you?’;
}
Do this:
let name = ‘Amy’;
let message = name === ‘Amy’ ? ‘Welcome back Amy’ : ‘Who are you?’;
#programming #coding #javascript #javascript-tips
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
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
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:
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., 7, Bob, 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
1616670795
Hire Dedicated JavaScript Developers -Hire JavaScript Developers
It is said that a digital resource a business has must be interactive in nature, so the website or the business app should be interactive. How do you make the app interactive? With the use of JavaScript.
Does your business need an interactive website or app?
Hire Dedicated JavaScript Developer from WebClues Infotech as the developer we offer is highly skilled and expert in what they do. Our developers are collaborative in nature and work with complete transparency with the customers.
The technology used to develop the overall app by the developers from WebClues Infotech is at par with the latest available technology.
Get your business app with JavaScript
For more inquiry click here https://bit.ly/31eZyDZ
Book Free Interview: https://bit.ly/3dDShFg
#hire dedicated javascript developers #hire javascript developers #top javascript developers for hire #hire javascript developer #hire a freelancer for javascript developer #hire the best javascript developers