Re^3: extracting number from string

You copied the regex incorrectly.

perl -e '$n = "Price 15.40"; $n =~s/[^\d.]//g; print "$n\n";'
[download]

Produces

15.40
[download]

--
seek $her, $from, $everywhere if exists $true{love};

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Re^4: extracting number from string by samuelalfred (Sexton) on Mar 05, 2009 at 12:54 UTC
Oh, sorry. Now its working. Could you please explain what the expression ^\d. means? Would be nice to understand how it works. What if I want this to work also for ","? In order words I would like it to extract all digits, "." AND ",". Is that possible? Thanks!	[reply]
Re^5: extracting number from string by johngg (Canon) on Mar 05, 2009 at 14:03 UTC
I you enclose bits of code in <c> and </c> tags the square brackets you typed will be preserved rather than being taken as some sort of link. So, `[\d.]` denotes a character class consisting of digits and a full stop. Note that `\d` is in itself a character class which is the equivalent of `[0-9]`. Adding a comma is simplicity itself - `[\d.,]`. Have a look at perlretut and perlre for further information. I hope this will be helpful. Cheers, JohnGG Update: As AnomalousMonk points out, I totally forgot to explain the significance of the caret symbol at the start of a character class. Sorry!	[reply] [d/l] [select]
Re^6: extracting number from string by AnomalousMonk (Archbishop) on Mar 05, 2009 at 18:29 UTC
And further, the regex metacharacter `^` at the beginning of a character set complements the characters specified in the set, so that `[^\d.,]` means "any character except a decimal digit, full-stop or comma".	[reply] [d/l] [select]