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BNF Q1: Grouping and Pipes In this question, you will add support for grouping and piping. Recall that grouping allows for an entire regular expressio 阅读全文
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Regular Expressions Q1: Calculator Ops Write a regular expression that parses strings written in the 61A Calculator language and returns any expressio 阅读全文
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Q2: Roman Numerals Write a regular expression that finds any string of letters that resemble a Roman numeral and aren't part of another word. A Roman 阅读全文