Regular expressions: Difference between revisions
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=={{header|GeneXus}}== |
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Interesting link: http://wiki.gxtechnical.com/commwiki/servlet/hwiki?Regular+Expressions+%28RegEx%29,<br /> |
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<br /> |
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Replacement:<br /> |
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<lang genexus>&string = &string.ReplaceRegEx("^\s+|\s+$", "") // it's a trim! |
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&string = &string.ReplaceRegEx("Another (Match)", "Replacing $1") // Using replace groups</lang> |
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Check match: |
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<lang genexus>If (&string.IsMatch("regex$")) |
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// The string ends with "regex" |
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EndIf</lang> |
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Split RegEx: |
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<lang genexus>&stringCollection = &string.SplitRegEx("^\d{2,4}")</lang> |
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Matches: |
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<lang genexus>&RegExMatchCollection = &string.Matches("(pa)tt(ern)") |
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For &RegExMatch In &RegExMatchCollection |
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&FullMatch = &RegExMatch.Value // &FullMatch contains the full pattern match: "pattern" |
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For &matchVarchar In &RegExMatch.Groups |
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// &matchVarchar contains group matches: "pa", "ern" |
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EndFor |
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EndFor</lang> |
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Flags: <br /> |
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s - Dot matches all (including newline) <br /> |
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m - multiline <br /> |
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i - ignore case <br /> |
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Using Flags Sintax: (?flags)pattern <br /> |
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Example:<br /> |
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<lang genexus>&string = &string.ReplaceRegEx("(?si)IgnoreCase.+$", "") // Flags s and i</lang> |
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Error Handling: |
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<lang genexus>&string = "abc" |
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&RegExMatchCollection = &string.Matches("[z-a]") // invalid pattern: z-a |
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&errCode = RegEx.GetLastErrCode() // returns 0 if no error and 1 if an error has occured |
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&errDsc = RegEx.GetLastErrDescription()</lang> |
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=={{header|Go}}== |
=={{header|Go}}== |
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<lang go>package main |
<lang go>package main |