Course of Raku / Regexes and grammars / Grammars / The parse tree, make and made / Exercises

Extract the number

Problem

Write a grammar that matches a weight like '5kg' — a number (one or more digits) followed by the literal unit kg. Using an inline make, attach just the numeric value as a real integer, dropping the unit. Parse '5kg' and print the result of .made.

Example

The program prints:

5

Solution

✅ See the solution

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