与无序的多部分关键

0

如果有人感兴趣。我并不满意任何建议。可能是因为我希望查看线路解决方案，而据我所知，这种解决方案并不存在。反正我也写了一个工具，叫做ljoin（用于数据库的左连接等），其不正是我要求（当然：d）

#!/usr/bin/perl 
=head1 NAME 

ljoin.pl - Utility to left join files by specified key column(s) 

=head1 SYNOPSIS 

ljoin.pl [OPTIONS] <INFILE1>..<INFILEN> <OUTFILE> 

To successfully join rows one must suply at least one input file and exactly one output file. Input files can be real file names or a patern, like [ABC].txt or *.in etc. 


=head1 DESCRIPTION 

This utility merges multiple file into one using specified column as a key 

=head2 OPTIONS 

=item --field-separator=<separator>, -fs <separator> 

Specifies what string should be used to separate columns in plain file. Default value for this option is tab symbol. 

=item --no-sort-fields, -no-sf 

Do not sort columns when creating a key for merging files 

=item --complex-key-separator=<separator>, -ks <separator> 

Specifies what string should be used to separate multiple values in multikey column. For example "A B" in one file can be presented as "B A" meaning that this application should somehow understand that this is the same key. Default value for this option is space symbol. 

=item --no-sort-complex-keys, -no-sk 

Do not sort complex column values when creating a key for merging files 

=item --include-primary-field, -i 

Specifies whether key which is used to find matching lines in multiple files should be included in the output file. First column in output file will be the key in any case, but in case of complex column the value of first column will be sorted. Default value for this option is false. 

=item --primary-field-index=<index>, -f <index> 

Specifies index of the column which should be used for matching lines. You can use multiple instances of this option to specify a multi-column key made of more than one column like this "-f 0 -f 1" 

=item --help, -? 

Get help and documentation 

=cut 


use strict; 
use warnings; 
use Getopt::Long; 
use Pod::Usage; 

my $fieldSeparator = "\t"; 
my $complexKeySeparator = " "; 
my $includePrimaryField = 0; 
my $containsTitles = 0; 
my $sortFields = 1; 
my $sortComplexKeys = 1; 
my @primaryFieldIndexes; 

GetOptions(
    "field-separator|fs=s" => \$fieldSeparator, 
    "sort-fields|sf!" => \$sortFields, 
    "complex-key-separator|ks=s" => \$complexKeySeparator, 
    "sort-complex-keys|sk!" => \$sortComplexKeys, 
    "contains-titles|t!" => \$containsTitles, 
    "include-primary-field|i!" => \$includePrimaryField, 
    "primary-field-index|[email protected]" => \@primaryFieldIndexes, 
    "help|?!" => sub { pod2usage(0) } 
) or pod2usage(2); 

pod2usage(0) if $#ARGV < 1; 

push @primaryFieldIndexes, 0 if $#primaryFieldIndexes < 0; 

my %primaryFieldIndexesHash; 
for(my $i = 0; $i <= $#primaryFieldIndexes; $i++) 
{ 
    $primaryFieldIndexesHash{$i} = 1; 
} 

print "fieldSeparator = $fieldSeparator\n"; 
print "complexKeySeparator = $complexKeySeparator \n"; 
print "includePrimaryField = $includePrimaryField\n"; 
print "containsTitles = $containsTitles\n"; 
print "primaryFieldIndexes = @primaryFieldIndexes\n"; 
print "sortFields = $sortFields\n"; 
print "sortComplexKeys = $sortComplexKeys\n"; 

my $fieldsCount = 0; 
my %keys_hash =(); 
my %files =(); 
my %titles =(); 


# Read columns into a memory 
foreach my $argnum (0 .. ($#ARGV - 1)) 
{ 
    # Find files with specified pattern 
    my $filePattern = $ARGV[$argnum]; 
    my @matchedFiles = < $filePattern >; 
    foreach my $inputPath (@matchedFiles) 
    { 
     open INPUT_FILE, $inputPath or die $!; 

     my %lines; 
     my $lineNumber = -1; 
     while (my $line = <INPUT_FILE>) 
     { 
      next if $containsTitles && $lineNumber == 0; 

      # Don't use chomp line. It doesn't handle unix input files on windows and vice versa 
      $line =~ s/[\r\n]+$//g; 

      # Skip lines that don't have columns 
      next if $line !~ m/($fieldSeparator)/; 

      # Split fields and count them (store maximum number of columns in files for later use) 
      my @fields = split($fieldSeparator, $line); 
      $fieldsCount = $#fields+1 if $#fields+1 > $fieldsCount; 

      # Sort complex key 
      my @multipleKey; 
      for(my $i = 0; $i <= $#primaryFieldIndexes; $i++) 
      { 
       my @complexKey = split ($complexKeySeparator, $fields[$primaryFieldIndexes[$i]]); 
       @complexKey = sort(@complexKey) if $sortFields; 
       push @multipleKey, join($complexKeySeparator, @complexKey) 
      } 

      # sort multiple keys and create key string 
      @multipleKey = sort(@multipleKey) if $sortFields; 
      my $fullKey = join $fieldSeparator, @multipleKey; 

      $lines{$fullKey} = \@fields; 
      $keys_hash{$fullKey} = 1; 
     } 
     close INPUT_FILE; 

     $files{$inputPath} = \%lines; 
    } 
} 

# Open output file 
my $outputPath = $ARGV[$#ARGV]; 
open OUTPUT_FILE, ">" . $outputPath or die $!; 
my @keys = sort keys(%keys_hash); 

# Leave blank places for key columns 
for(my $pf = 0; $pf <= $#primaryFieldIndexes; $pf++) 
{ 
    print OUTPUT_FILE $fieldSeparator; 
} 

# Print column headers 
foreach my $argnum (0 .. ($#ARGV - 1)) 
{ 
    my $filePattern = $ARGV[$argnum]; 
    my @matchedFiles = < $filePattern >; 
    foreach my $inputPath (@matchedFiles) 
    { 
     print OUTPUT_FILE $inputPath; 

     for(my $f = 0; $f < $fieldsCount - $#primaryFieldIndexes - 1; $f++) 
     { 
      print OUTPUT_FILE $fieldSeparator; 
     } 
    } 
} 

# Print merged columns 
print OUTPUT_FILE "\n"; 
foreach my $key (@keys) 
{ 
    print OUTPUT_FILE $key; 

    foreach my $argnum (0 .. ($#ARGV - 1)) 
    { 
     my $filePattern = $ARGV[$argnum]; 
     my @matchedFiles = < $filePattern >; 
     foreach my $inputPath (@matchedFiles) 
     { 
      my $lines = $files{$inputPath}; 

      for(my $i = 0; $i < $fieldsCount; $i++) 
      { 
       next if exists $primaryFieldIndexesHash{$i} && !$includePrimaryField; 
       print OUTPUT_FILE $fieldSeparator; 
       print OUTPUT_FILE $lines->{$key}->[$i] if exists $lines->{$key}->[$i]; 
      } 
     } 
    } 

    print OUTPUT_FILE "\n"; 
} 
close OUTPUT_FILE;

来源

2011-06-11 21:27:28

0

不适用排序文件对于任何选美比赛，这似乎接近：

#!/bin/bash 
while read one two; do 
one=`echo $one | sed -e 's/,/\n/g' | sort | sed -e ' 
1 {h; d} 
$! {H; d} 
H; g; s/\n/,/g; 
'` 
echo $one $two 
done | sort

来源

2011-02-10 17:15:58

0

更改内部字段分隔符，然后com用“>”删除前两个字母：

( 
IFS=" ,"; 
while read a b n; do 
    if [ "$a" \> "$b" ]; then 
     echo "$b,$a $n"; 
    else 
     echo "$a,$b $n"; 
    fi; 
done; 
) <<EOF | sort 
A,C 1 
C,B 2 
B,A 3 
EOF

来源

2011-02-10 21:37:02 marco

与无序的多部分关键

回答

相关问题