Master regular expressions by predicting what they do — character classes and anchors, quantifiers (greedy vs lazy), capturing groups, the global flag, and the match/replace/split operations. Every answer is computed by running the pattern in a real regex engine (JavaScript flavor, noted in each question), so the explanations are exact. Builds the pattern-reading fluency you need for interviews and everyday work. Part of the Developer track.
• Meets you at your level — never too easy, never too hard.
• Adapts every question to how you’re doing.
• Tracks your level over time. Skill practice, not a test.
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