Home / user-171731

Paul's questions

Martin Hope
Paul
Asked: 2022-02-07 14:20:57 +0800 CST
  • 2

For example, I have the string 11aa32bbb5and I want to extract only the characters aa, bbbor the numbers11, 32, 5

How do I confirm that a letter or string is alphanumeric or not?

This is the implementation I have.

const checkChar = (ch) => {
    if (ch.charCodeAt(0) >= 97 && ch.charCodeAt(0) <= 122) {
        return true;
    };
    return false;
};

Thank you!

javascript
Martin Hope
Paul
Asked: 2022-02-06 15:45:46 +0800 CST
  • 0

For example, I can start an application on port localhost:8080 and if I go to the browser I can see my application. I understand that it is like a communication endpoint but no more.

Can someone explain to me in a simple way how a port works?

For example, what happens when I open Chrome, is it using ports?

aplicación-web
Martin Hope
Paul
Asked: 2020-05-19 20:23:32 +0800 CST
  • 1

Like the question, How to create a set in Go?

For example in Python I can do set()or {}to create one that can hold any object. As far as I know there is no equivalent of a set in Go, but you have to use a map.

Is there an equivalent in Go that can hold multiple types? As I would do it?

Thank you!

go