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match and regular expressions

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Nov 13.2010

I was recently parsing SVG data using JavaScript String.match, and came across a problem. I was taking out coordinates to use them in a canvas application, and tried to do this:

[code]
var r = /[mc][B]([+-]?d+(.d+)?,?)[/B]+/i;
“m12.6-52.1”.match(r);
[/code]

As it’s supposed to, this just matches the last capture of the bolded group, so, just -52.1 is returned. I can’t think of an easy way around this, so I wondered if anyone else has one.

If not, I’ll probably end up leaving the regular expressions and using normal string methods to parse it, but I’d really like to use regular expressions.

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5 Comments(s) ↴

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@PprakashNov 13.2010 — Why you use 'mc' insted of 'm' for matching letter 'm'.

I really say I did not clearly undestand whcic h data matched
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@FangNov 13.2010 — 2 matches are returned: [I]-52.1[/I] and [I].1[/I]

Can you be more specific in what should be returned?
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@Declan1991authorNov 13.2010 — Why you use 'mc' insted of 'm' for matching letter 'm'.[/QUOTE]Because I'm also matching for c! That's just a sample.

@Fang, indeed I wasn't very clear. I want 12.6 and -52.1 without having to repeat myself in the regular expression.
/m([+-]?d+(.d+)?,?)([+-]?d+(.d+)?,?)/i will do what I want, but since I also want to be able to match a bezier curve which has 6 coordinates, I would rather not have to use things like this./c([+-]?d+(.d+)?,?)([+-]?d+(.d+)?,?)([+-]?d+(.d+)?,?)([+-]?d+(.d+)?,?)([+-]?d+(.d+)?,?)([+-]?d+(.d+)?,?)/i
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@FangNov 13.2010 — [CODE]var r = /([+-]?[d+.?d+]+)/g;
var arr ="m12.6-52.1".match(r);
alert(arr);
[/CODE]
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@Declan1991authorNov 13.2010 — That'll do fine. I'd rather test for the m or c in the same regexp all in one go, but what you have is great, thanks.
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