regular expression.vi doesn't work correctly

[ralfc]

I try to parse the output from "Flatten To XML" using "Find Regular Expression" but I get unexpected results.

Input: "<LvVariant><Name>myName</Name><Cluster>...</Cluster></LvVariant>"

Regular expression: "<(.+)><Name>(\w+)</Name>(.+)</\1>"

Expected result: match1 = "LvVariant", match2 = "myName", match3 = "<Cluster>...</Cluster>", total match = input, before match = empty, after match = empty.

LabVIEW's result: before match = input, all other output strings are empty.

I checked the expression with other programming languages like PHP and Delphi. There it works fine, but not in LabVIEW. I think, there is a bug at the "Find regular expression.vi".

[ben64]

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@ralfc wrote:

I try to parse the output from "Flatten To XML" using "Find Regular Expression" but I get unexpected results.

Input: "<LvVariant><Name>myName</Name><Cluster>...</Cluster></LvVariant>"

Regular expression: "<(.+)><Name>(\w+)</Name>(.+)</\1>"

Expected result: match1 = "LvVariant", match2 = "myName", match3 = "<Cluster>...</Cluster>", total match = input, before match = empty, after match = empty.

LabVIEW's result: before match = input, all other output strings are empty.

I checked the expression with other programming languages like PHP and Delphi. There it works fine, but not in LabVIEW. I think, there is a bug at the "Find regular expression.vi".

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You are not using the Match Regular Expression correctly, try this:

You need to expand the bottom of the vi to get the captured groups.

Ben64