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 Compare if two Maps are Equal in Golang
Testing the equivalence of maps in Go.
reflect.DeepEqual Function
It first checks if both maps are nil, then it checks if they have the same length before finally checking to see if they have the same set of (key, value) pairs.
package main
impo...
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 Sort a Slice in Go
In Golang, using the sort.Slice function is the easiest way to sort a slice
Using Slice Function
You simply pass an anonymous function to the sort.Slice function：
package main
import (
"fmt"
"sort"
)
func main() {
s := []string{"Houston...
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 Check if IP Address is in Private Network Space in Go
In Golang, using the IsPrivate function is the easiest way to check if IP address is in private network space.
Using IsPrivate Function
The IsPrivate() function reports whether ip is a private address, according to RFC 1918 (IPv4 addresses) and RFC...
How to check if a string contains a specific word in PHP
In PHP, there are 2 ways to check if a string contains a specific word.
Using strpos Function
The strpos(string $haystack, string $needle, int $offset = 0): int|false function finds the numeric position of the first occurrence of needle in the hayst...
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 Remove all Empty Strings from a List of Strings in Python
In Python, there are 3 ways to remove all empty strings from a list of strings.
Using filter Function
The filter(function, iterable) function constructs an iterator from those elements of iterable for which function returns true.
The following exam...
How to Check if a String is a Valid URL in Go
In Golang, there are 2 ways to validate URL with standard package.
Using ParseRequestURI Function
url.ParseRequestURI parses a raw url into a URL structure. It assumes that url was received in an HTTP request, so the url is interpreted only as an ab...
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 Convert a Bool to a String in Go
In Golang, there are 2 ways to convert a bool to a string.
Using strconv.FormatBool Function
The strconv.FormatBool() function returns "true" or "false" according to the value of b. For example,
package main
import (
"fmt"
"strconv"
)
fun...
How To Make a For Loop and Range in Rust
In Rust, there are 3 ways to support For Loop expression.Using while Expression
A while loop begins by evaluating the boolean loop conditional operand.
fn main() {
let mut i = 0;
while i < 3 {
println!("{}", i);
i += 1;
}
// Vec
...
How to check if key exists in HashMap in Rust
In Rust, there are 2 ways to check if key exists in HashMap.
Using HashMap::contains_key Method
The contains_key method return true if the map contains a value for the specified key.
use std::collections::HashMap;
fn main() {
let mut map = Hash...
How to convert string to json in Rust
In Rust, there are 3 ways to convert string to json.
Using Serde JSON
Serde is a framework for serializing and deserializing Rust data structures efficiently and generically.
Adding dependencies
In Cargo.toml file we’ll add this information.
[de...