changing-records-between-labels.rex

Pipelines v2.1

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 **** Top of file ****
 1
 2 /* The following pipeline reads the file: stock.xml and changes the pricing entries in the
 3 XYZ stock_quote section to zero. The price_type values are set to zero without altering their
 4 precision. The BETWEEN stage ensures that only the records in the XYZ section are selected
 5 and changed. */
 6
  7 Address Rxpipe
 8
 9 'pipe (endchar @)',
 10 '< &installdrive:\&installpath\examples\input\stock.xml',
 11 '| f: between casei( zone w1-* )', /* Select records in the.. */
 12 '\<symbol>xyz</symbol>\ \</stock_quote>\', /* ..XYZ quote section. */
 13 '| b: locate anycase /<price type=/', /* Select pricing records. */
 14 '| xlate ws /=/ w3 1-9 0', /* Translate the price to zero. */
 15 '| c: faninany', /* Read from any stream. */
 16 '| cons', /* Display on the console. */
 17 '@',
 18 'f:', /* Unselected records from Between. */
 19 '| take *', /* Select all records. */
 20 '| c:', /* Route back to Faninany stage. */
 21 '@',
 22 'b:', /* Unselected records from Locate. */
 23 '| take *', /* Select all records. */
 24 '| c:', /* Route back to Faninany stage. */
 25
 26 Say 'Hit Enter to close..'
  27 Parse Pull
 28
 29 Exit 0
 **** End of file ****
 

Console output

 
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 1 <stock_quotes>
 2
 3 <stock_quote>
 4 <symbol>XYZ</symbol>
 5 <date>12/16/1999</date>
 6 <time>4:40PM</time>
 7 <price type="ask" value="000.000"/>
 8 <price type="open" value="000"/>
 9 <price type="high" value="000.0"/>
 10 <price type="low" value="0"/>
 11 <change>+2.1875</change>
 12 <volume>7050200</volume>
 13 </stock_quote>
 14
 15 <stock_quote>
 16 <symbol>ABC</symbol>
 17 <date>12/16/1999</date>
 18 <time>4:01PM</time>
 19 <price type="ask" value="113.6875"/>
 20 <price type="open" value="109.25"/>
 21 <price type="high" value="115"/>
 22 <price type="low" value="108.9375"/>
 23 <change>+5.25</change>
 24 <volume>64282200</volume>
 25 </stock_quote>
 26
 27  ...
 28
 29 </stock_quotes>
 30
 31
 32 Hit Enter to close..