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Full Discussion: print contents of file2 for matching pattern in file1 - AWK
Top Forums UNIX for Advanced & Expert Users print contents of file2 for matching pattern in file1 - AWK Post 302351245 by Vi-Curious on Monday 7th of September 2009 08:35:33 PM
Old 09-07-2009
Quote:
Originally Posted by i.scientist
this worked but ...can u please explain ?
Quick/dirty and slightly inefficient but ok....

Code:
perl -nle '<perl expression>' file1 file2

Read each line from file1 and file2 and perform <perl expression> on each line.

Code:
if (/^(\d+)$/) {$x .= "|$1";}

If the line consists of a single integer number, append it to variable x using | as a separator. The ^ is beginning of line, the $ is end of line and (\d+) represents one or more decimal digits. After your file1 example is processed, $x will equal |100|103|104|108.

Code:
else { $y = substr($x,1);print $_ if /[|]$y[|]/ }

If the line is not a single integer (then it will be your entries from file2), strip the first character off of variable x and save what remains in y. This is inefficient because it has to be done for each line that is processed. This places 100|103|104|108 in y. Print the line if it contains any of the strings in variable y located between two | characters.
 

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LEARN ABOUT ULTRIX

mv

mv(1)							      General Commands Manual							     mv(1)

Name
       mv - move or rename files

Syntax
       mv [-i] [-f] [-] file1 file2

       mv [-i] [-f] [-] file... directory

Description
       The command moves (changes the name of) file1 to file2.

       If  file2  already  exists,  it is removed before file1 is moved.  If file2 has a mode which forbids writing, prints the mode and reads the
       standard input to obtain a line.  If the line begins with y, the move takes place.  If it does not, exits.  For further information, see

       In the second form, one or more files (plain files or directories) are moved to the directory with their original file-names.

       The command refuses to move a file onto itself.

Options
       -		   Interprets all following arguments as file names to allow file names starting with a minus.

       -f		   Force. This option overrides any mode restrictions or the -i switch.

       -i		   Interactive mode.  If a move is to supersede an existing file, the system prompts youw with the name of the	file  fol-
			   lowed  by  a question mark.	If you type a string that begins with y, the move occurs.  If you type any other response,
			   the move does not occur.

Restrictions
       If file1 and file2 lie on different file systems, must copy the file and delete the original.  In this case the owner name becomes that	of
       the copying process and any linking relationship with other files is lost.

See Also
       cp(1), ln(1)

																	     mv(1)
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