To remove a duplicate word from a string

[123jk]

hi,

I need to remove duplicate word and also invalid data from the string

for eg, x="1 2 3.4 5 6 1 3"
the o/p should be
1 2 5 6 3

removing all the duplicates and invalid data( valid data - numbers no floating values)

How to do this..

Thanks,
jaya

 

[toolkit]

This would be quite easy using perl:

#!/usr/bin/perl -w

%seen = ();
foreach( @ARGV ) {
    next unless /^\d+$/;
    push @num, $_ unless $seen{$_}++;
}
print "@num\n";

Used like:

./test.pl 1 2 3.4 5 6 1 3

Returns:

1 2 5 6 3

Cheers, Neil

 

[123jk]

Hi,

Thanks for the response.

I need this to be implemented through shell script.
I think it can be implemented easily in 'sed'. but i don't have much experience in using sed.

Thanks,
jaya

 

[vgersh99]

echo $x | nawk '
{ for (i=1; i <= NF ; i++) $i=(match($i, /\./) ? &quot;&quot; : $i); print}
'