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Kotlin Programming vs Regex Patterns Every Developer Should Know

Compare these two topics side by side to decide which to study first — or tackle both!

💻

Kotlin Programming

Programming

170

Cards

~85m

Study time

Advanced

Difficulty

Sample questions

  • ▸What is null safety in Kotlin?
  • ▸How do you declare a nullable type in Kotlin?
  • ▸What is the safe call operator in Kotlin?
  • ▸What is the Elvis operator in Kotlin?
  • ▸What does the non-null assertion operator (!!) do?
Study Kotlin Programming →
💻

Regex Patterns Every Developer Should Know

Programming

120

Cards

~60m

Study time

Advanced

Difficulty

Sample questions

  • ▸What does the regex metacharacter <code>.</code> match by default?
  • ▸Which character class matches any single digit in most regex flavors?
  • ▸What does the shorthand <code>\w</code> match?
  • ▸What does the shorthand <code>\s</code> match?
  • ▸How do you match a literal dot in a regex?
Study Regex Patterns Every Developer Should Know →

🤔 Which should you study first?

Both topics are in the Programming category, so they complement each other well. We suggest starting with the smaller deck to build momentum:

Kotlin Programming

170 cards · ~85 min · Advanced

Regex Patterns Every Developer Should Know

120 cards · ~60 min · Advanced

⭐ Quicker to complete

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