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Topic
String normalization, parsing, tokenization, validation, and comparison problems.
Practice items tagged with Strings and Parsing.
Compare a deliberately simplified numeric dotted-version contract without claiming full SemVer 2.0 support.
Implements a word-frequency counter with normalization, punctuation handling, and stable ordering.
Implements a stable first-unique-character search using counts and original order.
Parses a simple filter expression into a validated dictionary without accepting arbitrary keys.