On 11-04-08 06:29 AM, Dmitry Simonchik wrote:

Can someone please help me with getting the value of the table cell with
HXT in the following html:

<table class="tblc">
<tr>
<td class="tdc">x</td>
<td>y</td>
</tr>
<tr>
<td class="tdc">a</td>
<td>b</td>
</tr>
</table>

I need the value of the second cell in a row that has first cell with
some predefined value (in the example above it can be x or a) I need the
arrow of the type (IOSArrow XmlTree String) How to write it?

import Text.XML.HXT.Core

main = do
 rs <- runX (readDocument [] "example.xml" >>> example "x")
 mapM_ putStrLn rs

-- example "blah" reports those 2nd columns such that
-- their 1st columns equal "blah"
example :: String -> IOSArrow XmlTree String
example s = deep (is "table" />
                 is "tr" >>>
                 listA (getChildren >>> is "td" /> getText) >>>
                 arrL get2nd
                )
 where get2nd (one:two:_) | one==s = [two]
       get2nd _ = []

is x = isElem >>> hasName x

The important part is using listA at the right point to extract the list of cells (belonging to the same row) so that with a list in your hand you can test the 1st item and find the 2nd item.

_______________________________________________
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe