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 Check if a String Contains Whitespace in Rust
In Rust, there are 2 ways to check if a string contains whitespace.
Using char::is_whitespace
char::is_whitespace returns true if the character has the Unicode White_Space property.
You can pass char::is_whitespace to .contains():
fn main() {
...
How to Remove Invalid UTF-8 Characters from a String in Go
In Golang, there are 3 ways to remove invalid UTF-8 characters from a string.
Using ToValidUTF8 Function
The strings.ToValidUTF8() function returns a copy of the string s with each run of invalid UTF-8 byte sequences replaced by the replacement str...
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 Remove the First Character of a String in Go
In Golang, using the DecodeRuneInString function is the easiest way to remove the first character of a string.
Using DecodeRuneInString Function
The following example should cover whatever you are trying to do:
package main
import (
"fmt"
...
How to Reverse a String in Rust
In Rust, there are 2 ways to reverse a string.
Using rev Function
The str::rev() function reverses an iterator’s direction.
See the following example:
fn main() {
let mut s = "Hello";
println!("{}", s.chars().rev().collect::<String>());...
How to Get the String Length in Characters in Rust
In Rust, there are 2 ways to get the string length in characters.
Using chars Function
The str::chars() function returns an iterator over the chars of a string slice.
See the following example:
fn main() {
let mut s = "Hello";
println!("{}...
How to Check If two Strings are Equal in a Case-Insensitive Manner in Go
In Golang, using the strings.EqualFold function is the easiest way to check if two strings are equal in a case-insensitive manner
Using strings.EqualFold Function
The strings.EqualFold() function reports whether s and t, interpreted as UTF-8 strings...
How to Remove all Whitespace in a String in Python
In Python, there are 3 ways to remove all whitespace in a string.
Using str.replace Function
The str.replace(x) function returns a copy of the string with all occurrences of substring old replaced by new.
See the following example:
#!/usr/bin/p...
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 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 Iterate Over a String by Character in Rust
In Rust, there are 3 ways to iterate over a string by character.
Using chars Method
The chars() method returns an iterator over the chars of a string slice. See the following example:
fn main() {
let s = "abc";
for c in s.chars() {
pr...
How to Trim Leading and Trailing White Spaces of a String in Go
In Golang, there are 3 ways to trim leading and trailing white spaces of a string.
Using strings.TrimSpace Function
The easiest way to trim leading and trailing white spaces of a string in Golang. For example,
package main
import (
"fmt"
"...