Question

I want to replace && with & and & with nothing. There are never more than 2 consecutive &s.

Currently I have:

$m =~s/&&/££%££/g;
$m =~s/&//g;
$m =~s/££%££/&/g;

Is there a better way?

Answer 1

Try this regular expression instead:

$m =~ s/&(&?)/$1/g;

See it working online: ideone

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This version will also work with more than 2 ampersands:

$m =~ s/&(&*)/$1/g;

See it working online: ideone