Skip lines with transformLine
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Skip lines with transformLine
by Tom Corcoran
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I am wondering if there any way I am missing of skipping lines when using transformLine?
The last line in the closure is the line value written. Looking at a SSCCE, we have file1.txt with 4 lines: line1 line2 line11 line22 I want to produce the file2.txt with 2 lines: line1 line11 import java.util.regex.Matcher import java.io.Reader import java.io.Writer def file1 = /C:\Workspace\Test\file1.txt/ def file2 = /C:\Workspace\Test\file2.txt/ def writeLine FileWriter writeFile = new FileWriter(file2) new FileReader(file1).transformLine(writeFile) { line -> Matcher m1 = line =~ /line1\d*/ writeLine = '' if (m1.matches()) { writeLine = line } writeLine } will give: line1 <blank line> line11 <blank line> I could then reprocess the field to remove blank lines, but it would be great if there was a way of skipping lines with transformLine. |
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RE: Skip lines with transformLine
by Jürgen Hermann-2
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you're not transforming lines, you're filtering them. look at
http://www.amath.net/perso/tmp/java/io/Reader.html again. ;) > -----Original Message----- > From: Tom Corcoran [mailto:boardtc@...] > Sent: Wednesday, August 27, 2008 6:33 PM > To: user@... > Subject: [groovy-user] Skip lines with transformLine > > > I am wondering if there any way I am missing of skipping > lines when using > transformLine? > > The last line in the closure is the line value written. > Looking at a SSCCE, > we have file1.txt with 4 lines: > > line1 > line2 > line11 > line22 > > I want to produce the file2.txt with 2 lines: > > line1 > line11 > > import java.util.regex.Matcher > import java.io.Reader > import java.io.Writer > > def file1 = /C:\Workspace\Test\file1.txt/ > def file2 = /C:\Workspace\Test\file2.txt/ > def writeLine > FileWriter writeFile = new FileWriter(file2) > new > FileReader(file1).transformLine(writeFile) { line -> > Matcher m1 = line =~ /line1\d*/ > writeLine = '' > if (m1.matches()) { > writeLine = line > } > writeLine > } > > will give: > > line1 > <blank line> > line11 > <blank line> > > I could then reprocess the field to remove blank lines, but > it would be > great if there was a way of skipping lines with transformLine. > -- > View this message in context: > http://www.nabble.com/Skip-lines-with-transformLine-tp19184756 > p19184756.html > Sent from the groovy - user mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe from this list, please visit: > > http://xircles.codehaus.org/manage_email > > > --------------------------------------------------------------------- To unsubscribe from this list, please visit: http://xircles.codehaus.org/manage_email |
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Re: Skip lines with transformLine
by Saager Mhatre
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Wouldn't Reader.filterLine do the job?
On Wed, Aug 27, 2008 at 10:02 PM, Tom Corcoran <boardtc@...> wrote:
-- Saager Mhatre |
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Re: Skip lines with transformLine
by Armin Ehrenfels
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Tom Corcoran schrieb:
> I am wondering if there any way I am missing of skipping lines when using > transformLine? > > The last line in the closure is the line value written. Looking at a SSCCE, > we have file1.txt with 4 lines: > > line1 > line2 > line11 > line22 > > I want to produce the file2.txt with 2 lines: > > line1 > line11 > > import java.util.regex.Matcher > import java.io.Reader > import java.io.Writer > > def file1 = /C:\Workspace\Test\file1.txt/ > def file2 = /C:\Workspace\Test\file2.txt/ > def writeLine > FileWriter writeFile = new FileWriter(file2) > new FileReader(file1).transformLine(writeFile) { line -> > Matcher m1 = line =~ /line1\d*/ > writeLine = '' > if (m1.matches()) { > writeLine = line > } > writeLine > } > > will give: > > line1 > <blank line> > line11 > <blank line> > > I could then reprocess the field to remove blank lines, but it would be > great if there was a way of skipping lines with transformLine. > Regards Armin --------------------------------------------------------------------- To unsubscribe from this list, please visit: http://xircles.codehaus.org/manage_email |
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Re: Skip lines with transformLine
by Saager Mhatre
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def input = new StringReader("""
line1 line2 line11 line22 """) def output = System.out output << input.filterLine { l -> l ==~ /line1\d*/ } On Thu, Aug 28, 2008 at 4:06 PM, Saager Mhatre <saager.mhatre@...> wrote:
-- Saager Mhatre |
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Re: Skip lines with transformLine
by Tom Corcoran
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Thanks for the posts everyone. I need to use transformLine, though my SSCCE did not suggest that, so filterLine will not work for me. Armin, Great idea initialising to null. Works well. Only issue I think is that an extra blank line is added to file2.txt. I then have to strip this as it later causes an import error for me....
Tom.
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Re: Skip lines with transformLine
by Armin Ehrenfels
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Tom Corcoran schrieb:
> Thanks for the posts everyone. I need to use transformLine, though my SSCCE > did not suggest that, so filterLine will not work for me. Armin, Great idea > initialising to null. Works well. Only issue I think is that an extra blank > line is added to file2.txt. I then have to strip this as it later causes an > import error for me.... > > Tom. > > Strange, doesn't happen to me. Is it appended after the last line matched ? Armin --------------------------------------------------------------------- To unsubscribe from this list, please visit: http://xircles.codehaus.org/manage_email |
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