Re^2: Trying to grep array of hashes

This is mostly good advice, but this part:

The regex /\b$team\b/ will match even if $team is only a substring of the string being searched.

looks wrong to me: \b in a regex matches a word boundary, so substrings will not match:

 2:24 >perl -wE "for (qw[cat catastrophe]) { say qq[$_: matches] if /c
+at/; }"
cat: matches
catastrophe: matches

 2:26 >perl -wE "for (qw[cat catastrophe]) { say qq[$_: matches] if /\
+bcat\b/; }"
cat: matches

 2:26 >
[download]

See “Assertions” under perlre#Regular-Expressions. But I agree that eq is better than a regex in this situtation, and a hash lookup would be preferable to using grep.

Update: Anonymous Monk, below, makes an excellent point: some substrings will still match. A word boundary is defined as:

a spot between two characters that has a \w on one side of it and a \W on the other side of it (in either order), counting the imaginary characters off the beginning and end of the string as matching a \W.

— and a hyphen is considered a “non-word” (i.e., it matches /\W/).

Cheers,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

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Re^3: Trying to grep array of hashes by haukex (Archbishop) on Feb 07, 2017 at 21:21 UTC
Hi Athanasius, You're absolutely right of course. My intention was to warn that, if only exact matches are desired, `"ABC DEF GHI"=~/\bDEF\b/` (`"DEF"` being a "substring" of `"ABC DEF GHI"`) would give a false positive. But by omitting a discussion of `\b`, my node became inaccurate, so thank you for the reply :-) Thanks, -- Hauke D	[reply] [d/l] [select]
Re^3: Tyring to grep array of hashes by Anonymous Monk on Feb 07, 2017 at 16:44 UTC
`for (qw[cat catastrophe cat-ass-trophy]) { say qq[$_: matches] if /\bcat\b/ }`	[reply] [d/l]