Course of Raku / Regexes and grammars / Regexes / Adverbs / Case-insensitive matching
Quiz — Ignorecase
What does the following program print? The pattern is upper-case and the text is mixed-case.
say 'Hello' ~~ /:i HELLO/;| 1 | ｢Hello｣ |
| 0 | ｢HELLO｣ |
| 0 | True |
| 0 | False |
The :i adverb turns off the upper/lower-case
distinction, and it works in either direction — here the upper-case
pattern HELLO matches the mixed-case text. The result is
the matched text as it appears in the string, ｢Hello｣.