How to Stop a goroutine in Golang
Several Ways to Stop Goroutine in Go.
A signal channel
Typically, you pass the goroutine a (possibly separate) signal channel. That signal channel is used to push a value into when you want the goroutine to stop. The goroutine polls that channel reg...
How to Use Deferred Function Calls in Golang
Understanding defer in Go.
Deferred Function Calls
A defer statement is an ordinary function or method call prefixed by the keyword defer. The function and argument expressions are evaluated when the statement is executed, but the actual call is def...
How to Use the Constant Generator iota in Golang
Working with Constants and iota in Go.
The Constant Generator iota
Here’s an example from the time package, which defines named constants of type Weekday for the days of the week, starting with zero for Sunday. Types of this kind are often called en...
How to Use bytes.Buffer in Golang
Golang bytes.Buffer Examples
Examples of Golang bytes.Buffer
The bytes package provides the Buffer type for efficient manipulation of byte slices. A Buffer starts out empty but grows as data of types like string, byte, and []byte are written to it.
...
How to Format a Currency with Commas in Golang
Formatting float to currency string in Go.
Using localized formatting
Use golang.org/x/text/message to print using localized formatting for any language in the Unicode CLDR.
Make a main.go file containing the following:
package main
import (
"...
How to Get correct file base name in Golang
Golang path and filepath Examples.
Using filepath.Base
The number is the index of the last slash in the string. If you want to get the file's base name, use filepath.Base:
package main
import (
"fmt"
"path/filepath"
)
func main() {
path ...
How to Convert the Fahrenheit to Celsius in Golang
Calculate degrees celcius from farenheit in Go.
Following program shows you how to convert fahrenheit to celsius.
The function FToC below encapsu- lates the temperature conversion logic so that it is defined only once but may be used from multiple p...
How to Convert String to Rune in Golang
Understanding Rune in Go.
UTF-8 Decoder
The unicode/utf8 package provides one that we can use like this:
package main
import (
"fmt"
"unicode/utf8"
)
func main() {
s := "Hello, 世界"
for i := 0; i < len(s); {
r, size := utf8.DecodeR...
How to Use Strings in Golang
Introduction to Strings in Go.What is a String?
A string is an immutable sequence of bytes. Strings may contain arbitrary data, including bytes with value 0, but usually they contain human-readable text.
Make a main.go file containing the following...
How to Add Two Numbers in Go
An example program using numbers.
Integers And Floating Point Numbers
Go has several different types to represent numbers. Generally we split numbers into two different kinds: integers and floating-point numbers.
Make a main.go file containing the ...
How to Check if a Slice Contains an Element in Go
In Golang, there are 2 ways to check if a slice contains an element.
Using contains Function
The following example should cover whatever you are trying to do:
package main
import "fmt"
func Contains[E comparable](s []E, v E) bool {
for _, ...
How to Check String is In Json Format in Go
In Golang, there are 2 ways to check string is in json format.
Using Unmarshal Function
The following example should cover whatever you are trying to do:
package main
import (
"encoding/json"
"fmt"
)
func isJson(s string) bool {
var js ...
How to Get Name of Current Script in Python
In Python, using the __file__ is the easiest way to get name of current script.
Using Module Attributes
You can use __file__ to get the name of the current file. When used in the main module, this is the name of the script that was originally invoke...
How to Make a List of Alphabet Characters in Python
In Python, there are 2 ways to make a list of alphabet characters.
Using string Module
The string.ascii_lowercase is a pre-initialized string used as string constant. In Python, string ascii_lowercase will give the lowercase letters ‘abcdefghijklmno...
How to Encrypt and Decrypt a String Using AES GCM 256 in Go
In Golang, using the crypto/aes package is the easiest way to encrypt a string using AES GCM 256.
In cryptography, Galois/Counter Mode (GCM) is a mode of operation for symmetric-key cryptographic block ciphers which is widely adopted for its performa...
