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Last Friday of each month: Difference between revisions
→{{header|Perl 6}}
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Here, <code>classify</code> sorts the dates into one bin per month (but preserves the order in each bin). We then take the list inside each bin (<code>.value</code>) and find the last (<code>.reverse.first</code>) date which is a Friday.
Another variation where the data flow can be read left to right using feed operators:
<lang perl6>sub MAIN (Int $year = Date.today.year) {
.say for Date.new("$year-01-01") .. Date.new("$year-12-31") ==> classify *.month ==>
map *.value.reverse.first: *.day-of-week == 5
}</lang>
=={{header|PHP}}==
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