[Omaha.pm] Count occurrences of the value of an attribute in XML

["Jay Hannah" <jhannah@omnihotels.com>]

Problem:  Given data like this:

$ head RevData.DALMAN.20070529.xml
<revolutiondata asof="20070529192916" hotel="DALMAN" seq="20070529"
ver="1.50">
  <rates>
    <rate end="20070530" rt="DELUXE" seg="01" start="20070529">
      <minmax gcnt="1" max="315.00" min="315.00"/>
      <minmax gcnt="2" max="315.00" min="315.00"/>
      <minmax gcnt="3" max="325.00" min="325.00"/>
    </rate>
    <rate end="20070604" rt="DELUXE" seg="01" start="20070531">
      <minmax gcnt="1" max="305.00" min="305.00"/>
      <minmax gcnt="2" max="305.00" min="305.00"/>

Count the number of each occurence of the attribute 'rt'.



Solution:

$ perl -lne '/rt="(\w+)"/; print $1' RevData.DALMAN.20070529.xml | uniq
-c
      2
    585 DELUXE
    422 SUITES


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