DEV Community: José Paulo

What are the data types in golang?

José Paulo — Fri, 03 Jan 2025 11:54:19 +0000

Hey guys, in this article you will learn about the basic variables and types in Golang.

First of all, what is Golang? Golang is a simple, objective and extremely efficient language created by Google Movements. The main objective is to do a lot with little code.

1. Basic Types

one. Integers

Signed integers:

int (size depends on architecture: 32 bits on 32-bit systems, 64 bits on 64-bit systems) int8 (8 bits, -128 to 127) int16 (16 bits, -32,768 to 32,767) int32 (32 bits, -2,147,483,648 to 2,147,483,647) int64 (64 bits, -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807)

Unsigned integers:

uint (size depends on architecture: 32 or 64 bits) uint8 (8 bits, 0 to 255; equivalent to byte) uint16 (16 bits, 0 to 65,535) uint32 (32 bits, 0 to 4,294,967,295) uint64 (64 bits, 0 to 18,446,744,073,709,551,615)

b. Floating Point Numbers
float32 (precision of 6 to 9 decimal digits) float64 (precision of 15 to 17 decimal digits)

w. Complex Numbers
complex64 (composed of two float32 values) complex128 (composed of two float64 values)

d. Strings
string: immutable sequence of Unicode characters.

and. Booleans
bool: can be true or false.

2. Composite Types

the. Arrays
Contain a fixed number of elements of a single type.

var nums [5]int // Array of 5 integers

b. slices
Represent dynamic slices of arrays.

nums := []int{1, 2, 3, 4, 5}

w. Maps
Key-value structure.

var m map[string]int // Map from string to integer

d. Structures
Collection of grouped fields.

type Person struct { String name Internal age }
and. Pointers
Reference to memory address.

var p *int

f. Interfaces
Defines behavior and allows abstraction.

type Interface Animal { String Speak() }

3. Special Types

the. Functions
Types that represent functions.
var f function(int, int) int

b. Channels
Used for communication between goroutines.

var ch chan int
w. void interface
Void interface (interface{}) that can store any type.

var xinterface{}

d. Unsafe pointer
Pointers that bypass type checking. Used in advanced scenarios.

import "unsafe" var p unsafe.Pointer

Resume
Data types in Go are designed to be simple and efficient, with a focus on type safety and performance. They cover most common use cases and offer enough flexibility for complex applications.

🚀 link: https://go.dev/tour/basics/11

how to configure the template generator in Intellij?

José Paulo — Tue, 18 Jul 2023 23:28:50 +0000

In IntelliJ IDEA, you can create a template to generate code using Live Templates. Live Templates are pre-built code templates that can be inserted into your code with just a few hotkeys.

Here's a step-by-step guide to creating a template in IntelliJ IDEA:

Select "Settings" or "Preferences" (depending on your operating system) (Cntrl + Shift + S).

In the settings window, navigate to "Editor" and expand the "Live Templates" option.
Select the programming language in which you want to create the template (eg Java, Python, etc.).

Click the "+" button on the right side of the window to add a new Live Template.

In the "Abbreviation" field, enter an abbreviation that you will use to trigger the template while typing.

In the "Template text" field, enter the code you want to generate. You can use variables to automatically fill in specific information, such as a class or method name.

Set the context options for the template. This will determine in which situations the template will be suggested. For example, you can set the context so that the template is only applicable in Java files or inside a class.

Click "OK" to save the template.
Now, whenever you type the abbreviation you defined for the template while typing in a relevant file, IntelliJ IDEA will suggest expanding the template. You can press the Tab key to accept the suggestion and expand the code.

This is an efficient way to save time when generating pattern code in IntelliJ IDEA.

How to add powershell in terminal in SprintToolSuite(STS) IDE?

José Paulo — Wed, 12 Jul 2023 18:00:48 +0000

Hello everyone, I will teach you how to add the powershell executable in the IDE spring tool suite (STS) or Eclipse

1 - Open IDE eclispe/Spring tools suite

2 - Windows >> Preferences >> Pesquise por "Terminal"

3 - Click in Add

4 - in add External Executable :

Name: PowerShell (Name of your choice)
Path: Path of the powershell executable on your machine

Copy the full path
Exmplo: C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

And add in the path

Arguments: (Optional)
Icon: (Optional)
Checkbox: Translate Backslashes on Past(Optional)

5 - Click in ADD

6 - Apply >> Apply and Close

7 - And finally, open the powershell terminal.

Thank you.

Open source projects for beginners

José Paulo — Fri, 07 Jul 2023 00:42:01 +0000

Hello everyone, everything good?

I would like suggestions for open source projects to improve my knowledge.

I'm a junior Java developer in development and would like to participate in this challenge.

java #software #opensource