Letters-Numbers - 2026-01-29 - FreeCodeCamp Daily Challenge скачать в хорошем качестве

Letters-Numbers - 2026-01-29 - FreeCodeCamp Daily Challenge

Today, I take on "Letters-Numbers", a challenge to add dashes between letter to number or number to letter transitions. This challenge lets us explore something called `lastIndex` in regular expressions and why that can work against you, if you don't understand it. Ultimately, we use a positive lookbehind to get the job done easily. Part of my goal of completing every FreeCodeCamp daily challenge for a year, This is just one solution, not every solution. If you have one that you like better, please share it in the comments. --- Links: FreeCodeCamp Challenge: https://www.freecodecamp.org/learn/da... `lastIndex` for regular expressions, on MDN: https://developer.mozilla.org/en-US/d... Positive lookbehinds on MDN: https://developer.mozilla.org/en-US/d...