From the documentation for HTML::TableExtract, emphasis added:

rows()

Return all rows within a matched table. Each row returned is a reference to an array containing the text, HTML, or reference to the HTML::Element object of each cell depending the mode of extraction. Tables with rowspan or colspan attributes will have some cells containing undef. Returns a list or a reference to an array depending on context.

You need to decide how to handle the cases where cells span rows or columns. If you just want to ignore it, then you can use grep to filter them out, eg print "a cell: $_\n" for grep {defined} @$rows;.

In reply to Re: optimizing a parser running HTML::TableExtract to fetch only some labels and values [row by row] by Anonymous Monk
in thread optimizing a parser running HTML::TableExtract to fetch only some labels and values [row by row] by Perlbeginner1

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