(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
Fatih Sokmen fatihsokmen
staltz
/ introrx.md
Last active
December 1, 2025 11:31
The introduction to Reactive Programming you've been missing
gabrielbauman
/ CardType.java
Last active
December 13, 2023 04:21
A Java enum representing credit card types (Visa, Mastercard etc) that can detect card type from a credit card number.
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| package com.gabrielbauman.gist; | |
| import java.util.regex.Pattern; | |
| public enum CardType { | |
| UNKNOWN, | |
| VISA("^4[0-9]{12}(?:[0-9]{3}){0,2}$"), | |
| MASTERCARD("^(?:5[1-5]|2(?!2([01]|20)|7(2[1-9]|3))[2-7])\\d{14}$"), | |
| AMERICAN_EXPRESS("^3[47][0-9]{13}$"), |