regex
https://gobyexample.com/regular-expressions
![Go by Example_ Regular Expressions.pdf](../../../_resources/Go%20by%20Example_%20Regular%20Expressions.pdf)

for url
```go
func DoesContainURL(str string) (bool, error) {
	// regex := `/^https?:\/\/(?:www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b(?:[-a-zA-Z0-9()@:%_\+.~#?&\/=]*)$/`
	regex := `https?://[^\s]+`

	res, err := regexp.MatchString(regex, str)

	fmt.Println("does: ", res)

	return res, err
}

DoesContainURL("sd http://yourrt.com/122 sads") // true


```