Regular expression help please. (extracting a string subset between two markers)

[DMartins]

Thank you for your time! Really!
But please excuse my noobness! Again, I am experiencing some difficulties.

I do read the string nicely! But sometimes, maybe because of frequency issues, my communication board does not respond in propper time! Sometimes I do not read at all, or just manage to read partial information like "DAT " or "DATA 2" instead of "DATA 20.00", since the acquisition did not receive any information from the board in created attempts.
I am currently looping in order to verify if it read the full word or only partial. Is there any way I can control the number of decimal places after the point of the number on the string?
Or better, any way I can check if I have read all the string properly at once?
The string will always come with a word, a space and a number. Instead of your example to read from "!" to "?", may I or is somehow better to restrict it to the precise format? If so, what expression will match this string?

Thank you in advance!

[jcarmody]

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@DMartins wrote:

[...] Is there any way I can control the number of decimal places after the point of the number on the string?

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Sure.  If there will always be two digits past the decimal point the regex will contain \.\d\d or \.[\d]{2}

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@DMartins wrote:

[...]

Or better, any way I can check if I have read all the string properly at once?
The string will always come with a word, a space and a number. Instead of your example to read from "!" to "?", may I or is somehow better to restrict it to the precise format? If so, what expression will match this string?

Thank you in advance!

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If you want to enforce the number of digits past the decimal point, change the last '*' to '{n}', where n equals the number of digits you need.  The regex will also need to change if there are some instances where there won't be a decimal point.  I may not have understood quite what you're asking.  Please provide some actual data, both correct and malformed, and we can figure this out.

[AndreiN1983]

Hello everybody ! I would like to post a question concerning the subject of this thread. How to get all the characters between 2 delimiters taking into account that the characters could anything from the ascii character list ? So for example the string could be :

 00 00 02 00 06 03 42 02

or

......B.

or

......à....Öh

or

..........€›Ò

or

..........۟.

How can i do this ? Andrew

[GerdW]

Hi Andrei,

for example the string could be : 00 00 02 00 06 03 42 02

What are your marker values and what is the interesting part of the string?

A very simple approach (using 0x02 as marker byte) could be: