Javascript to Golang: First Impressions

I started learning Golang recently and after completing a project I wanted to share some of the first impressions of transitioning from Javascript/Node.js to Go.

1. Types. Types are built-in in Go. This is way cooler than Typescript because there’s no extra setup effort, all Go libraries are typed so absolutely all of the ecosystem has types. This also means that there’s no need for tools like Webpack and build step is so much simpler!
2. Go modules are the equivalent to NPM packages. However, Go’s package manager is very basic, for example, you can’t execute scripts from it. In my project I had to use make to launch scripts.
3. There’re no truthy or false values in Go (similarly to Java). The following code will not compile:

test := 5
if test {
    // ... do something
}

1. Structs in Go are values, like in C. This means that after passing a struct as function parameter, changing the struct inside that function and returning from the function the struct will not retain the changes:

package main

import (
	"fmt"
)

type test struct {
	number int
}

func change(num test) test {
	num.number = 7
	return num
}

func main() {
	num := test{ 5 }
	change(num)
	fmt.Println(num.number) // prints 5
}

This is because function parameters are copied by value and structs are values in Go. In case you want to mutate a struct from inside another function it should be passed as a pointer. Passing struct as a pointer is also preferred if the struct is big so that all of its fields are not copied.

#go #javascript 

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The Nuances of Constants in Go; Go Isn't JavaScript

Constants can be confusing and easy to misuse in Go if you are coming from an untyped language. Let’s take a look at some of the nuanced details of how they work in Go. It’s probably unsurprising, but Go’s constants are almost nothing like JavaScript’s bastardized version of the concept.

Go vs JavaScript

Many programming languages support constants, often denoted by the keyword const.

Go and JavaScript both declare new constants in the same way:

const frameRate = 60

Constants in Go

• Must be able to be assigned at compile time. The value of a const can’t be the result of a runtime calculation.
• Run faster because the compiler can make specific optimizations.
• Cannot change. The compiler will not allow them to be re-assigned.
• Only work with some types. Arrays, Slices, Maps, Structs, etc… can’t be made constant
• Are not normal Go types unless explicitly assigned as such

#languages #clean code #engineering practices #golang #javascript #compile #const #constant #global #go #golang #javascript

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

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Hire Dedicated JavaScript Developers -Hire JavaScript Developers

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The essential JavaScript concepts that you should understand

As a JavaScript developer of any level, you need to understand its foundational concepts and some of the new ideas that help us developing code. In this article, we are going to review 16 basic concepts. So without further ado, let’s get to it.

#javascript-interview #javascript-development #javascript-fundamental #javascript #javascript-tips

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