Shell script to find, search and replace array of strings in a file

Question

This is linked to another question/code-golf i asked on Code golf: "Color highlighting" of repeated text

I\'ve got a file \'sample1.txt\' with the following co

Answer 1

Straightforward with Perl:

#! /usr/bin/perl

use warnings;
use strict;

my @words = qw/
  LoremIpsum
  LoremIpsu
  dummytext
  oremIpsum
  LoremIps
  dummytex
  industry
  oremIpsu
  remIpsum
  ummytext
  LoremIp
  dummyte
  emIpsum
  industr
  mmytext
/;

my $to_replace = qr/@{[ join "|" =>
                        sort { length $b <=> length $a }
                        @words
                     ]}/;

my $i = 0;
while (<>) {
  s|($to_replace)|++$i; "<T$i>$1</T$i>"|eg;
  print;
}

Sample run (wrapped to prevent horizontal scrolling):

$ ./tag-words sample.txt
<T1>LoremIpsum</T1>issimply<T2>dummytext</T2>oftheprintingandtypesetting<T3>indus
try</T3>.<T4>LoremIpsum</T4>hasbeenthe<T5>industry</T5>'sstandard<T6>dummytext</T
6>eversincethe1500s,whenanunknownprintertookagalleyoftypeandscrambledittomakeatyp
especimenbook.

You may object that all the qr// and @{[ ... ]} business is on the baroque side. One could get the same effect with the /o regular-expression switch as in

# plain scalar rather than a compiled pattern
my $to_replace = join "|" =>
                 sort { length $b <=> length $a }
                 @words;

my $i = 0;
while (<>) {
  # o at the end for "compile (o)nce"
  s|($to_replace)|++$i; "<T$i>$1</T$i>"|ego;
  print;
}

Answer 2

Pure Bash (no externals)

At the Bash command line:

$ sample="LoremIpsumissimplydummytextoftheprintingandtypesettingindustry.LoremIpsumhasbeentheindustry'sstandarddummytexteversincethe1500s,whenanunknownprintertookagalleyoftypeandscrambledittomakeatypespecimenbook."
$ # or: sample=$(<sample1.txt)
$ array=(
LoremIpsum
LoremIpsu
dummytext
...
)
$ tag=0; for entry in ${array[@]}; do test="<[^>/]*>[^>]*$entry[^<]*</"; if [[ ! $sample =~ $test ]]; then ((tag++)); sample=${sample//${entry}/<T$tag>$entry</T$tag>}; fi; done; echo "Output:"; echo $sample
Output:
<T1>LoremIpsum</T1>issimply<T2>dummytext</T2>oftheprintingandtypesetting<T3>industry</T3>.<T1>LoremIpsum</T1>hasbeenthe<T3>industry</T3>'sstandard<T2>dummytext</T2>eversincethe1500s,whenanunknownprintertookagalleyoftypeandscrambledittomakeatypespecimenbook.