Last Friday of each month: Difference between revisions
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Add NetRexx implementation |
→{{header|Lasso}}: Adding Lasso example fro last fridays, leveraging isLeapYear method |
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2012 Nov 30
2012 Dec 28</pre>
=={{header|Lasso}}==
<lang Lasso>define isLeapYear(y::integer) => {
#y % 400 == 0 ? return true
#y % 100 == 0 ? return false
#y % 4 == 0 ? return true
return false
}
define fridays(y::integer) => {
local(out = array)
loop(12) => {
local(last = 28)
loop_count == 2 && isLeapYear(#y) ? #last = 29
array(4,6,9,11) >> loop_count ? #last == 30
#last == 28 && loop_count != 2 ? #last = 31
local(start = date(-year=#y,-month=loop_count,-day=#last))
while(#start->dayofweek != 6) => {
#start->subtract(-day=1)
}
#out->insert(#start)
}
return #out
}
with f in fridays(2012) do => {^
#f->format('%Q') + '\r'
^}</lang>
{{out}}
<pre>2012-01-27
2012-02-24
2012-03-30
2012-04-27
2012-05-25
2012-06-29
2012-07-27
2012-08-31
2012-09-28
2012-10-26
2012-11-30
2012-12-28</pre>
=={{header|Mathematica}}==
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