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 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 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 a Random Number Between a Float Range in Python
In Python, using the uniform function is the easiest way to get a random number between a float range.
Using uniform Method
The random.uniform(a, b) method returns a random floating point number N such that a
How to Encrypt and Decrypt a String Using AES CBC in Go
In Golang, using the crypto/aes package is the easiest way to encrypt a string using AES CBC.
Ehrsam, Meyer, Smith and Tuchman invented the cipher block chaining (CBC) mode of operation in 1976. In CBC mode, each block of plaintext is XORed with the ...
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 Get Current Time in Milliseconds in Python
In Python, there are 3 ways to get current time in milliseconds.
Using time Method
The time.time() method returns the time in seconds since the epoch as a floating point number. For example,
#!/usr/bin/python3
# Import module
import time
ms =...
How to Count Characters in a String in Go
In Golang, there are 2 ways to count characters in a string.
Using RuneCountInString Function
Straight forward natively use the utf8.RuneCountInString()
The following example should cover whatever you are trying to do:
package main
import (
...
How to Print the Memory Address of a Slice in Go
In Golang, using the %p verbs is the easiest way to print the memory address of a slice.
Using fmt.Printf Function
Pointer:
%p base 16 notation, with leading 0x. The %b, %d, %o, %x and %X verbs also work with pointers,
formatting the value exactly ...
How to List Files of a Directory in Rust
In Rust, using the read_dir function is the easiest way to list files of a directory.
Using read_dir Function
The fs::read_dir() function returns an iterator over the entries within a directory.
See the following example:
use std::fs;
fn main...
How to Get the ASCII Value of a Character as an Int in Python
In Python, using the ord function is the easiest way to get the ASCII value of a character as an int.
Using ord Function
The ord() function returns an integer representing the Unicode code point of that character.
To get the ASCII code of a charact...
How to Check If an Object Is of a Given Type in Python
In Python, there are 2 ways to check if an object is of a given type.
Using isinstance Method
The isinstance(object, classinfo) method returns True if the object argument is an instance of the classinfo argument, or of a (direct, indirect, or virtua...
How to Check Whether a Path Exists in Rust
In Rust, using the Path::exists function is the easiest way to check whether a path exists.
Using Path::exists Function
The Path::exists() function returns true if the path points at an existing entity.
See the following example:
// Rust 1.5+
...
How to Index Characters in a String in Go
In Golang, there are 2 ways to index characters in a string.
Using individual characters
In UTF-8, ASCII characters are single-byte corresponding to the first 128 Unicode characters. Strings behave like slices of bytes. A rune is an integer value i...
How to Generate Random Integers Between 0 and 9 in Python
In Python, there are 3 ways to generate random integers between 0 and 9.
Using randrange Method
The random.randrange(start, stop[, step]) method returns a randomly selected element from range(start, stop, step). For example,
#!/usr/bin/python3
...