Re: Searching in an array of arrays

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Re^2: Searching in an array of arrays by Taulmarill (Deacon) on Nov 03, 2004 at 13:53 UTC
hm, at first sight i would say that `$last_range, $first_day` should be initialised outside the for-loop. look at and execute this: `for ( 1 .. 10 ) { my $i; $i++; print $i; } print "\n"; my $i; for ( 1 .. 10 ) { $i++; print $i; } print "\n";` [download]	[reply] [d/l] [select]
Re^2: Searching in an array of arrays by perl_seeker (Scribe) on Nov 04, 2004 at 08:52 UTC
Hello zejames! Thanks a lot for your reply. I do not understand your code fully, please bear with me. What are the variables last_range and first_day used for, and what should their initial values be? Also for this line, `my $range = $day->[1] - ($day->[1] % 5);` [download] I get this error: Operation `%': no method found,left argument in overloaded package XML +::XPath::Literal,right argument has no overloaded magic at C:\..\xmlr +ecord_parse.pl line 604. [download] Using sprintf removes the error, but I'm not sure whether this is correct(i.e. the control string "%f"): `my $range = sprintf("%f","$day->[1]") - (sprintf("% f","$day->[1]") % 5);` [download] My array of arrays @data looks like this: `[ 1-1-2004 15.0 ], [ 2-1-2004 15.5 ], [ 3-1-2004 16.5 ], [ 4-1-2004 17.0 ], [ 5-1-2004 17.5 ], [ 6-1-2004 18.0 ], [ 7-1-2004 18.5 ], [ 8-1-2004 19.0 ], [ 9-1-2004 19.5 ], [ 10-1-2004 25.0 ], [ 11-1-2004 26.5 ], [ 12-1-2004 27.5 ], [ 13-1-2004 28.0 ], [ 14-1-2004 29.5 ], [ 15-1-2004 28.0 ], [ 16-1-2004 28.8 ],` [download] So the resulting array of arrays I need to build should look like this: `1-1-2004 5-1-2004 mild 10-1-2004 14-1-2004 verywarm` [download] The values of $range (printing inside the loop)I'm getting are: `15 15.5 15.5 15 15.5 15 15.5 15 15.5 25 25.5 25.5 25 25.5 25 25.8` [download] This statements does not print anything: `print "$first_day $day->[0] ".$ranges{$range}."\n";` [download] Please help, really need it! Thanks, perl_seeker:)	[reply] [d/l] [select]
Re^3: Searching in an array of arrays by zejames (Hermit) on Nov 04, 2004 at 09:54 UTC
I don't understand your first problem. Testing my code here with the `@data` defined as : `@data = ( [ '1-1-2004', 15.0 ], [ '2-1-2004', 15.5 ], [ '3-1-2004', 16.5 ], [ '4-1-2004', 17.0 ], [ '5-1-2004', 17.5 ], [ '6-1-2004', 18.0 ], [ '7-1-2004', 18.5 ], [ '8-1-2004', 19.0 ], [ '9-1-2004', 19.5 ], ... [ '16-1-2004', 28.8 ]);` [download] does work here. Could you provide code ? Your problem seems to be XML related. As for the range, you're right, there is problem, that is corrected in the new version, by converting temperature to an integer : `$day->[1] = int $day->[1];` [download] `$last_range` is used to remember the current range we are in. If that range remains unchanged 5 times, we print the range information. `$first_day` is used to remember the first day we saw the temperature of the current range; HTH -- zejames	[reply] [d/l] [select]
Re^4: Searching in an array of arrays by perl_seeker (Scribe) on Nov 04, 2004 at 10:20 UTC
Hi,this is (part of)the XML file I am parsing: - <AnnualWeatherRecord> - <DailyWeatherRecord> <date>1-1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="15.0" /> <mindrybulb unit="degrees-centigrade" number="15.0" /> <maxwetbulb unit="degrees-centigrade" number="33.53" /> <minwetbulb unit="degrees-centigrade" number="30.53" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>2-1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="15.5" /> <mindrybulb unit="degrees-centigrade" number="15.5" /> <maxwetbulb unit="degrees-centigrade" number="23.14" /> <minwetbulb unit="degrees-centigrade" number="20.14" /> </temperature> <totalrainfall unit="mm" number="0" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>3-1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="16.5" /> <mindrybulb unit="degrees-centigrade" number="16.5" /> <maxwetbulb unit="degrees-centigrade" number="33.53" /> <minwetbulb unit="degrees-centigrade" number="30.53" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>15-1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="28.0" /> <mindrybulb unit="degrees-centigrade" number="28.0" /> <maxwetbulb unit="degrees-centigrade" number="33.53" /> <minwetbulb unit="degrees-centigrade" number="30.53" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>16-1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="28.8" /> <mindrybulb unit="degrees-centigrade" number="28.8" /> <maxwetbulb unit="degrees-centigrade" number="33.53" /> <minwetbulb unit="degrees-centigrade" number="30.53" /> </temperature> <totalrainfall unit="mm" number="0" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>1-2-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="44.25" /> <mindrybulb unit="degrees-centigrade" number="39.25" /> <maxwetbulb unit="degrees-centigrade" number="33.53" /> <minwetbulb unit="degrees-centigrade" number="30.53" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </DailyWeatherRecord> - <DailyWeatherRecord> <date>2-2-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="50.25" /> <mindrybulb unit="degrees-centigrade" number="49.25" /> <maxwetbulb unit="degrees-centigrade" number="23.14" /> <minwetbulb unit="degrees-centigrade" number="20.14" /> </temperature> <totalrainfall unit="mm" number="0" /> </DailyWeatherRecord> - <MonthlyWeatherRecord> <date>1-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="33.95" /> <mindrybulb unit="degrees-centigrade" number="23.20" /> <avgdrybulb unit="degrees-centigrade" number="33.95" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </MonthlyWeatherRecord> - <MonthlyWeatherRecord> <date>2-2004</date> - <temperature> <maxdrybulb unit="degrees-centigrade" number="50.25" /> <mindrybulb unit="degrees-centigrade" number="39.25" /> <avgdrybulb unit="degrees-centigrade" number="44.25" /> </temperature> <totalrainfall unit="mm" number="0.5" /> </MonthlyWeatherRecord> </AnnualWeatherRecord> [download] And this is the code I'm using to parse it and build @data Subroutine `sub MonthlyMaxTempSpellMessage{ my $month = shift; #print "\n$month"; $month = "-$month-"; #print "\n$month"; my $xp = XML::XPath->new(filename =>'weather_records.xml'); my @data=(); my $nodes = $xp->findnodes("//DailyWeatherRecord [contains(date,'$month')]"); foreach my $node($nodes->get_nodelist){ push @data, [$xp->findvalue(".//date",$node),$xp- >findvalue(".//maxdrybulb /\@number",$node)]; } for my $aref ( @data ) { print "\t [ @$aref ],\n"; }` [download] Main `my $monthmts=1; MonthlyMaxTempSpellMessage($monthmts);` [download] Anything wrong here? What do I need to change in your code to build the required array of arrays? Thanks perl_seeker:)	[reply] [d/l] [select]