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POSearch and replace script on a given portion of text
 

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  1. POSearch and replace script on a given portion of text
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    <p>I'm manipulating text files and need to build a perl script to run a search replace only on the notes of a given portion of text (chapters in this case), so that I can convert this pattern: </p> <pre><code>Chapter 1:1 text here(Note a) more text here(Note b) 2 text here(Note c) more text here(Note d) 3 text here(Note e) more text here(Note f) 4 text here(Note g) more text here(Note h) Chapter 2:1 text here(Note i) more text here(Note j) 2 text here(Note k) more text here(Note l) 3 text here(Note m) more text here(Note n) 4 text here(Note o) more text here(Note p) 5 text here(Note q) more text here(Note r) 6 text here(Note s) more text here(Note t) </code></pre> <p>into this:</p> <pre><code>Chapter 1:1 text here(Note a) more text here(Note b) 2 text here(Note c) more text here(Note d) 3 text here(Note e) more text here(Note f) 4 text here(Note g) more text here(Note h) Chapter 2:1 text here(Note a) more text here(Note b) 2 text here(Note c) more text here(Note d) 3 text here(Note e) more text here(Note f) 4 text here(Note g) more text here(Note h) 5 text here(Note i) more text here(Note j) 6 text here(Note k) more text here(Note l) </code></pre> <p>In other words, I need to set the 'counter' of each note to "a" at the start of each new chapter. The following regex matches every chapter:</p> <pre><code>(?s)^\w{1,10} \d{1,3}:\d{1,3}.+?\(Note \w\).+?(?=\w{1,10} \d{1,3}:\d{1,3}) </code></pre> <p>and I have tried to use a while loop like this:</p> <pre><code>my @notes = ('Note a', 'Note b', 'Note c', 'Note d'); $Count = a; foreach my $Marker (@notes) { $_=~s/(\\(Note\\))[a-z]/"$1".$Count++/e; } </code></pre> <p>But I am stuck and cannot possibly think of a way to build a script in such a way that it stops at every chapter division and then starts again until the end. Maybe I'm using the wrong approach?</p> <p>What do I need to do in order to apply the search and replace only to each chapter, as shown above (i.e., the first regex)?</p> <p>Any help will be greatly appreciated. Thanks!</p> <p><strong>EDIT (July 30)</strong></p> <p>Both answers work fine. I voted the first one as my favorite because I understand the logic better, but BOTH are equally valid.</p> <p>Now, as a corollary to my first question. How could I easily include the chapter name and chapter number <strong>sequentially</strong> before each line? Like this:</p> <pre><code>Chapter 1:1 text here(Note a) more text here(Note b) Chapter 1:2 text here(Note c) more text here(Note d) Chapter 1:3 text here(Note e) more text here(Note f) Chapter 1:4 text here(Note g) more text here(Note h) Chapter 2:1 text here(Note a) more text here(Note b) Chapter 2:2 text here(Note c) more text here(Note d) Chapter 2:3 text here(Note e) more text here(Note f) Chapter 2:4 text here(Note g) more text here(Note h) Chapter 2:5 text here(Note i) more text here(Note j) Chapter 2:6 text here(Note k) more text here(Note l) </code></pre> <p>Do I need to use a variable and increment it or is there a simpler approach?</p>
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    1. COYou do not need to add `<br>` tags when posting your question, just press enter to make newlines.
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    2. COThanks for fixing it!
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