Course of Raku / Regexes and grammars / Regexes / Substitution and replacement / Exercises

Mask the digits

Problem

Take the string 'PIN 1234' and produce a copy in which every digit is replaced with a #, using the S/// operator so the original is left unchanged. Print the masked copy, then print the original to show it was not modified.

Example

The program prints:

PIN ####
PIN 1234

Solution

✅ See the solution

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