c:\@Work\Perl\monks>perl -wMstrict -MData::Dump -le
"my $x = qq{1234 abcd 5678};
dd split //, $x;
dd split /\b|\B/, $x;
"
(1 .. 4, " ", "a" .. "d", " ", 5 .. 8)
(1 .. 4, " ", "a" .. "d", " ", 5 .. 8)
This is probably just a matter of emphasis and interpretation.
... line anchors /^/ and /$/ don't require the /m option to match lines in a string.
Checking the docs, I recalled seeing this discussed before, but it's another one of those very specialized special cases that evaporates from my memory with time. However, it's not true for the /$/ case (per the docs (or at any rate, the docs say nothing about special-casing it)):
c:\@Work\Perl\monks>perl -wMstrict -MData::Dump -le
"my $x = qq{1234 \n abcd \n 5678};
dd split /^/, $x;
dd split /$/, $x;
"
("1234 \n", " abcd \n", " 5678")
"1234 \n abcd \n 5678"
Give a man a fish: <%-{-{-{-<
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