Extract strings using regular expressions in Delphi

Question

I have HTML where I need to collect all the content that has a particular format, e.g. get everything that is in the 00.000.000/0000-00 or XX.YYY.IIO/KKKK-LL formats.

Would use of regular expressions be the best way to accomplish this, or how else can I accomplish this?

I could do what I wanted with this: [0-9]{2}\.?[0-9]{3}\.?[0-9]{3}\/?[0-9]{4}\-?[0-9]{2} — Dark Ducke
– Dark Ducke, Commented Jul 9, 2015 at 23:25
That won't match XX.YYY.IIO/KKKK-LL. .{2}\..{3}\..{3}\/.{4}-.{2} ? — TLama
– TLama, Commented Jul 9, 2015 at 23:36
And your use of optional for those dot, slash and hyphen separators is wrong. You would be matching also 00000000000000 with such pattern. — TLama
– TLama, Commented Jul 9, 2015 at 23:52
Ugh! Yet another "how do I parse HTML/XML with regular expressions" question. Read stackoverflow.com/q/701166/62576 for one of many posts about why you've chosen the wrong tool for the job, and then use a DOM parser to make your life (and the lives of others who may have to maintain your code) much easier. — Ken White
– Ken White, Commented Jul 10, 2015 at 2:38

TLama · Accepted Answer · 2015-07-10 20:49:14Z

3

If you're looking for a pattern that will match:

xx.xxx.xxx/xxxx-xx

where x is only an alphanumeric char (that is a-z, A-Z and 0-9), then you can use this pattern:

[a-zA-Z0-9]{2}\.[a-zA-Z0-9]{3}\.[a-zA-Z0-9]{3}\/[a-zA-Z0-9]{4}-[a-zA-Z0-9]{2}

You can try it in this example.

answered Jul 10, 2015 at 20:49

TLama

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m.cekiera · Accepted Answer · 2015-07-09 23:54:02Z

1

Try with:

\w{2}\.\w{3}\.\w{3}\/\w{4}-\w{2}

answered Jul 9, 2015 at 23:54

m.cekiera

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