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Top Forums Shell Programming and Scripting Print Missing Header Name from File. Post 302968784 by pareshkp on Monday 14th of March 2016 12:10:12 PM
Old 03-14-2016
Print Missing Header Name from File.

HI Guys,

I have file A.txt

Code:
ID,L1,L2,L3,L4
1A,2a,33a,44b,55c
2A,10a,14a,15b,16c

File B.txt

Code:
ID
L1
L4
L5

Output:-

Code:
ID,L1,L4,L5
1A,55c,n/a
2A,16c,n/a

I have below solution which is works perfect if all header match from file b.

Code:
nawk -v OFS="," '$1=$1' $Lic1 > $Lic2

	nawk '
	BEGIN           {OFS = FS = ","}
	FNR == NR       {h[$0] = NR
                 MX = NR
                 next
                }
	FNR == 1        {for (i=1; i<=NF; i++) if ($i in h) a[h[$i]] = i
                }

                {for (i=1; i<=MX; i++) printf "%s%s", $a[i], (i==MX)?RS:OFS
                }
	' fileB fileA

Thanks
 

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Mojo::Asset::File(3pm)					User Contributed Perl Documentation				    Mojo::Asset::File(3pm)

NAME
Mojo::Asset::File - File storage for HTTP 1.1 content SYNOPSIS
use Mojo::Asset::File; # Temporary file my $file = Mojo::Asset::File->new; $file->add_chunk('foo bar baz'); say 'File contains "bar"' if $file->contains('bar') >= 0; say $file->slurp; # Existing file my $file = Mojo::Asset::File->new(path => '/home/sri/foo.txt'); $file->move_to('/yada.txt'); say $file->slurp; DESCRIPTION
Mojo::Asset::File is a file storage backend for HTTP 1.1 content. ATTRIBUTES
Mojo::Asset::File inherits all attributes from Mojo::Asset and implements the following new ones. "cleanup" my $cleanup = $file->cleanup; $file = $file->cleanup(1); Delete file automatically once it's not used anymore. "handle" my $handle = $file->handle; $file = $file->handle(IO::File->new); File handle, created on demand. "path" my $path = $file->path; $file = $file->path('/home/sri/foo.txt'); File path used to create "handle", can also be automatically generated if necessary. "tmpdir" my $tmpdir = $file->tmpdir; $file = $file->tmpdir('/tmp'); Temporary directory used to generate "path", defaults to the value of the "MOJO_TMPDIR" environment variable or auto detection. METHODS
Mojo::Asset::File inherits all methods from Mojo::Asset and implements the following new ones. "add_chunk" $file = $file->add_chunk('foo bar baz'); Add chunk of data. "contains" my $position = $file->contains('bar'); Check if asset contains a specific string. "get_chunk" my $chunk = $file->get_chunk($start); Get chunk of data starting from a specific position. "is_file" my $true = $file->is_file; True. "move_to" $file = $file->move_to('/home/sri/bar.txt'); Move asset data into a specific file and disable "cleanup". "size" my $size = $file->size; Size of asset data in bytes. "slurp" my $string = $file->slurp; Read all asset data at once. SEE ALSO
Mojolicious, Mojolicious::Guides, <http://mojolicio.us>. perl v5.14.2 2012-09-05 Mojo::Asset::File(3pm)
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