Changing the nested grep to a grep map would change the semantics of the code.

grep { grep { $_->text eq $search_text } $_->children  } @data;
[download]

This nested grep returns a list of elements for which any child contains the search text.

grep { $_->text eq $search_text } map { $_->children } @data;
[download]

This grep map a list of individual children that contain the search text.

 

With a search for 'menlo park', the nested grep returns two elements; one has the children '<city>menlo park</city>' and '<city>palo alto</city>', and the other has the children '<city>atherton</city>' and '<city>menlo park</city>'.

The grep map, on the other hand, would just return '<city>menlo park</city>' and '<city>menlo park</city>'.

---

---

• Are you posting in the right place? Check out Where do I post X? to know for sure.
• Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:

  <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>

• Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
• Want more info? How to link or How to display code and escape characters are good places to start.