Re^4: How to avoid an alphabet and integer next to it in a string?

$molform =~ s/[^a-zA-G0-9]//g;

Just eliminate the Hydrogen:

$molform =~ s/H\d*//g;
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Re^5: How to avoid an alphabet and integer next to it in a string? by piscean (Acolyte) on Mar 21, 2014 at 18:16 UTC
It says Forbidden chars. No output at all!	[reply]