43 lines
1.4 KiB
XML
43 lines
1.4 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<package xmlns="http://www.lovullo.com/rater"
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xmlns:c="http://www.lovullo.com/calc"
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core="true"
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desc="Vector element counting">
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<import package="../base" />
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<!-- TODO: deprecate in favor of the new c:length-of -->
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<function name="length" desc="Counts the number of items in a vector (regardless of value)">
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<param name="count_set" type="integer" set="vector" desc="Vector to count" />
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<c:sum of="count_set" index="k">
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<c:const value="1" type="integer" desc="Add 1 for each value in the set" />
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</c:sum>
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</function>
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<!-- similar to a logical "exists" -->
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<function name="hasany" desc="Returns 1 or 0 based on whether any values in a boolean vector are set" sym="\exists">
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<param name="any_set" type="boolean" set="vector" desc="Boolean set to check" />
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<c:ceil>
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<c:quotient label="Create a fraction > 0 if any value in the given set is 1">
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<c:sum of="any_set" label="Will be > 0 if any 1s exist in the set" />
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<c:sum>
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<c:apply name="length">
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<c:arg name="count_set">
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<c:value-of name="any_set" />
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</c:arg>
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</c:apply>
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<!-- ensure the equation is not undefined if length = 0 -->
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<c:const value="1" type="integer" desc="Add 1 to ensure equation is always defined" />
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</c:sum>
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</c:quotient>
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</c:ceil>
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</function>
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</package>
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