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multiple text edits inone pass

 
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# 1  
Old 04-20-2012
multiple text edits inone pass
File_1 looks like:

Code:
bunch of text
Untitled Placemark
bunch of text
bunch of text
Untitled Placemark
bunch of text
bunch of text
Untitled Placemark
bunch of text

File_2 looks like:

Code:
Title_001
Title_002
Title_003

First:
I need to replace the 1st occurence of "Untitled Placemark" in File_1 with the contents of the 1st record in File_2 "Title_001".
Then:
I need to replace the 2nd occurence of "Untitled Placemark" in File_1 with the contents of the 2nd record in File_2 "Title_002".
Then:
I need to replace the 3rd occurence of "Untitled Placemark" in File_1 with the contents of the 3rd record in File_2 "Title_003".

Thanks,
Kenny.

Moderator's Comments:
Mod Comment How to use code tags
Last edited by Scrutinizer; 04-20-2012 at 05:13 PM..
# 2  
Old 04-20-2012
Here's a stab at it. I'm sure some of the awk experts will come up with a slick way to do it in one line, but this works, is easy to follow and sets a framework for possible future line by line processing requirements. It assumes the titles will be taken in order as you describe. You could load the titles in an array too. Not sure about the performance trade-off between calling sed multiple times vs using an array.
Code:
$ cat x
#!/bin/ksh

## Define variables.
typeset -i ctr=1                              # Integer counter
typeset -r TEXT_TO_MATCH="Untitled Placemark" # Constants
typeset -r TITLE_FILE="file_2"
typeset -r SOURCE_FILE="file_1"

##
## Process SOURCE_FILE.
##
while read line
do
  if [[ "$line" != "$TEXT_TO_MATCH" ]]; then
    print $line
  else
    # Print the matching line from the TITLE_FILE instead.
    sed "${ctr},${ctr}!d" $TITLE_FILE
    (( ctr=ctr+1 ))
  fi

done < $SOURCE_FILE

exit 0

$ x
bunch of text
Title_001
bunch of text
bunch of text
Title_002
bunch of text
bunch of text
Title_003
bunch of text
$

For the sake of argument, here's a version that gets the titles from an array:
Code:
$ cat x1
#!/bin/ksh

## Define variables.
set -A title_array                            # Array to hold titles
typeset -i ctr=0                              # Integer counter
typeset -r TEXT_TO_MATCH="Untitled Placemark" # Constants
typeset -r TITLE_FILE="file_2"
typeset -r SOURCE_FILE="file_1"

##
## Load the title array from $TITLE_FILE.
##
while read title_text
do
  title_array[${ctr}]=${title_text}
  (( ctr=ctr+1 ))
done < $TITLE_FILE

## Reset the counter.
ctr=0

##
## Process SOURCE_FILE.
##
while read line
do
  if [[ "$line" != "$TEXT_TO_MATCH" ]]; then
    print $line
  else
    # Print the matching line from the title_array instead.
    print ${title_array[$ctr]}
    (( ctr=ctr+1 ))
  fi

done < $SOURCE_FILE


exit 0
$ x1
bunch of text
Title_001
bunch of text
bunch of text
Title_002
bunch of text
bunch of text
Title_003
bunch of text
$

FYI - I ran both several times using the time command, and the sed version runs a smidge slower. Granted, the test files are tiny and your performance may vary!
# 3  
Old 04-20-2012
Code:
awk '/^Untitled Placemark$/ { $0="Title_" sprintf("%03d", ++N) } 1' file_in > file_out

 
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