How to Fetch Return Value from a goroutine in Golang
Catching return values from goroutines in Go.
Channels
A channel is a communication mechanism that lets one goroutine send values to another goroutine.
Make a main.go file containing the following:
package main
import (
"fmt"
"time"
)
func ...
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 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 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 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 Get a SHA256 Hash from a String in Go
In Golang, using the Sum256 function is the easiest way to get a SHA256 hash from a string.Go implements several hash functions in various crypto/* packages.
Using Sum256 Function
The sha256.Sum256() function returns the SHA256 checksum of the data...
How to Get a MD5 Hash from a String in Go
In Golang, using the Sum function is the easiest way to get a MD5 hash from a string.
Using Sum Function
The md5.Sum() function returns the MD5 checksum of the data.
The following example should cover whatever you are trying to do:
package mai...
How to Delete the Contents of a Folder in Python
In Python, there are 2 ways to delete the contents of a folder.
Using rmtree Method
The shutil.rmtree() method deletes an entire directory tree; path must point to a directory. For example,
#!/usr/bin/python3
# Import module
import os, shutil
...
How to Check if Directory on Path is Empty in Go
In Golang, using the Readdirnames function is the easiest way to check if directory on path is empty.
Using Readdirnames Function
The file.Readdirnames(n int) function reads the contents of the directory associated with file and returns a slice of ...
How to Check if a File is a Valid Image in Go
In Golang, there are 2 ways to check if a file is a valid image.
Using DetectContentType Function
The http.DetectContentType() function implements the algorithm described at https://mimesniff.spec.whatwg.org/ to determine the Content-Type of the gi...
How to Set Environment Variables in Python
In Python, using the os.environ variable is the easiest way to set environment variables
Using os.environ Variable
os.environ behaves like a python dictionary, so all the common dictionary operations can be performed. In addition to the get and set ...
How to Get a List of All Subdirectories in the Current Directory in Python
In Python, there are 2 ways to get a list of all subdirectories in the current directory.
Using os.walk Function
The os.walk() method generates the file names in a directory tree by walking the tree either top-down or bottom-up.
The following examp...