problem with regular expression

Question

I have tried this expression: [a-z]+\|[a-z]+ but it contains similar code ([a-z]+). I want expression without copy-paste because in fact my expression is more complex.

Thanks in advance...

What exactly do you want to achieve? To split the string or just test it against the pattern? — Oleks
– Oleks, Commented Apr 5, 2011 at 10:07

Oleks · Accepted Answer · 2011-04-05 11:27:48Z

2

I think you need the next expression:

^[^|].*[^|]$

it matches a string if it isn't begins or ends with the | symbol.

answered Apr 5, 2011 at 11:27

Oleks

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Comments

stema · Accepted Answer · 2011-04-05 10:03:35Z

0

Try

(?:[A-Za-z]+\|?)+

The (?:) is a non capturing group and the \|? is looking for one or 0 |

You can add any character you are looking for between the []. There are also predefined character sets like \w for word characters (I am not sure what is defined as a word character within c# .net at least A-Za-z and _ )

answered Apr 5, 2011 at 10:03

stema

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2 Comments

Eugene Gluhotorenko Over a year ago

Your solution finds expression like this: "qweqe|qw|eqwerer|" too, but i need "|" only in middle.

stema Over a year ago

Then I am sure there is a solution using a lookahead assertion (I am sorry, not getting it to work at the moment), but this is also a complex expression. I think your expression [a-z]+\|[a-z]+ is then easier to read. And I would not name it copy-paste what you are doing here, you are describing your pattern.

Poma · Accepted Answer · 2011-04-05 10:07:16Z

0

Why not just use string.Split('|')?

If you want to verify that your string is valid use [a-z|]+

answered Apr 5, 2011 at 10:07

Poma

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