Course of Raku / Regexes and grammars / Regexes / Matching strings / Exercises / Where is the digit

Solution: Where is the digit

Here is a possible solution to the task.

Code

my $m = 'abc9x2z' ~~ /\d/;
say $m.from;
say $m.to;

🦋 You can find the source code in the file where-digit.raku.

Output

3
4

Comments

The \d class matches a single digit. The engine stops at the first one it finds — 9, at index 3 (positions count from zero); the later 2 is never reached.
.from gives the start of the match, 3, and .to gives the position just after it ends, 4. The difference .to - .from is the length of the match — one character here.

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