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February 07, 2011 [Issue 5544] New: all() and any() in Phobos | ||||
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http://d.puremagic.com/issues/show_bug.cgi?id=5544 Summary: all() and any() in Phobos Product: D Version: D2 Platform: All OS/Version: All Status: NEW Severity: enhancement Priority: P2 Component: Phobos AssignedTo: nobody@puremagic.com ReportedBy: bearophile_hugs@eml.cc --- Comment #0 from bearophile_hugs@eml.cc 2011-02-07 14:35:37 PST --- This is Python 2.6.6 code (shell): >>> items = [1, 7, 22] >>> all(x % 2 for x in items) False >>> items = [1, 7, 21] >>> all(x % 2 for x in items) True The functions all() and any() are very handy. With Phobos of DMD 2.051 if you want to translate that Python code to a D2 functional style you need something like: import std.algorithm; void main() { auto items = [1, 7, 22]; bool r1 = reduce!q{a && b}(true, map!q{a % 2}(items)); assert(!r1); items = [1, 7, 21]; bool r2 = reduce!q{a && b}(true, map!q{a % 2}(items)); assert(r2); } While using an all() it becomes shorter and more readable, something like (untested): import std.algorithm; void main() { auto items = [1, 7, 22]; bool r1 = all!q{a % 2}(items); assert(!r1); items = [1, 7, 21]; bool r2 = all!q{a % 2}(items); assert(r2); } -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
February 07, 2011 [Issue 5544] all() and any() in Phobos | ||||
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Posted in reply to bearophile_hugs@eml.cc | http://d.puremagic.com/issues/show_bug.cgi?id=5544 Jonathan M Davis <jmdavisProg@gmx.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jmdavisProg@gmx.com --- Comment #1 from Jonathan M Davis <jmdavisProg@gmx.com> 2011-02-07 14:51:11 PST --- Bug#4405 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
February 07, 2011 [Issue 5544] all() and any() in Phobos | ||||
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Posted in reply to bearophile_hugs@eml.cc | http://d.puremagic.com/issues/show_bug.cgi?id=5544 bearophile_hugs@eml.cc changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |DUPLICATE --- Comment #2 from bearophile_hugs@eml.cc 2011-02-07 15:08:53 PST --- Thank you for letting me know. *** This issue has been marked as a duplicate of issue 4405 *** -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- |
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