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1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> |
| 2 | <HTML> |
| 3 | <HEAD> |
| 4 | <TITLE> Extraction Code </TITLE> |
| 5 | </HEAD> |
| 6 | <H3 ALIGN=CENTER>1.6: Extraction Code </H3> |
| 7 | <TABLE ALIGN="CENTER" BORDER=0 WIDTH="95%"> |
| 8 | <TR> |
| 9 | <TD WIDTH="25%" ALIGN="LEFT"> |
| 10 | <A HREF="slide-0105.html">Prev</A> |
| 11 | <A HREF="slide-0107.html">Next</A> |
| 12 | <A HREF="index.html">Index</A> |
| 13 | <TD ALIGN="CENTER"> |
| 14 | Sort::Maker |
| 15 | <TD WIDTH="25%" ALIGN="RIGHT">Page 6/12 |
| 16 | </TR> |
| 17 | </TABLE> |
| 18 | <HR WIDTH="95%"> |
| 19 | <UL> |
| 20 | <li> Each key needs code to extract it from a record |
| 21 | |
| 22 | <li> Each record is aliased to $_ (via map) |
| 23 | |
| 24 | <li> Key extraction code operates on $_ and gets the value for this key |
| 25 | |
| 26 | <li> The extraction code is executed in list context so m/(foo)/ works |
| 27 | |
| 28 | <li> The code is inside a do{} block so you can have multiple statements |
| 29 | </UL> |
| 30 | <HR WIDTH="95%"> |
| 31 | <TABLE ALIGN="CENTER" BORDER=0 WIDTH="95%"> |
| 32 | <TR> |
| 33 | <TD WIDTH="30%" ALIGN="LEFT"> |
| 34 | <A HREF="slide-0105.html">Prev</A> |
| 35 | <A HREF="slide-0107.html">Next</A> |
| 36 | <A HREF="index.html">Index</A> |
| 37 | <TD ALIGN="CENTER"> |
| 38 | YAPC::NA 2004, Buffalo, NY |
| 39 | <TD WIDTH="25%" ALIGN="RIGHT">Page 6/12 |
| 40 | </TR> |
| 41 | |
| 42 | <TR> |
| 43 | <TD ALIGN="CENTER" COLSPAN="3"> |
| 44 | <FONT SIZE="-3">© 2004 Uri Guttman</FONT> |
| 45 | </TR> |
| 46 | |
| 47 | </TABLE> |
| 48 | </HTML> |
projects / urisagit/Sort-Maker.git / blame