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02-11-2009
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Code:
awk '{
if($2>_[$1])
_[$1]=$2
}
END{
for(i in _)
print i,_[i]
}' a.txt
Code:
#!/usr/bin/perl
open FH,"<a.txt";
while(<FH>){
chomp;
my @temp=split(" ",$_);
$arr{$temp[0]}=$temp[1] if ($temp[1] > $arr{$temp[0]});
}
for $k (keys %arr){
print $k," ",$arr{$k},"\n";
}
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