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http://www.exim.org/bugzilla/show_bug.cgi?id=458
------- Comment #17 from holmgren@??? 2007-02-10 19:55 -------
Created an attachment (id=68)
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http://www.exim.org/bugzilla/attachment.cgi?id=68&action=view)
An attempt at map and filter (should perhaps be called map_list and
filter_list)
${map {<list>}{<expression>}} iterates over <list>, setting $item to each list
element, and returns a list consisting of the results of the expansions of
<expression>. Forced expansion failure causes the element to be simply deleted.
${filter {<list>}{<condition>}} similarly iterates over <list>, keeping those
elements for which <condition> evaluates true.
The new list uses the same separator as the original one (but with no "<;" at
the beginning).
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