- ^ : comienzo de una cadena
- $ : final de una cadena
- (a|b) a or b
- [abc] Range (a or b or c)
- [^abc] Not (a or b or c)
- [0-7] Digit from 0 to 7
- aaa
- aaa
- aaa
- aaa
Chuleta:
- https://cheatography.com/davechild/cheat-sheets/regular-expressions/pdf/
- https://developer.mozilla.org/es/docs/Web/JavaScript/Guide/Regular_Expressions
- https://www.adictosaltrabajo.com/2015/01/29/regexsam/