Skip Menu |
 

This queue is for tickets about the List-MoreUtils CPAN distribution.

Report information
The Basics
Id: 19024
Status: open
Priority: 0/
Queue: List-MoreUtils

People
Owner: Nobody in particular
Requestors: DarGo [...] sPam.lA
mschwern [...] cpan.org
Cc:
AdminCc:

Bug Information
Severity: Wishlist
Broken in: (no value)
Fixed in: (no value)



Subject: wishlist: ltsorted, gtsorted
Download (untitled) / with headers
text/plain 175b
implement test functions $a < $b < $c and $a > $b > $c , etc. for large lists these functions would be more efficient than creating a sorted copy and comparing the two lists.
Subject: WG: [rt.cpan.org #19024] wishlist: ltsorted, gtsorted
Date: Wed, 03 May 2006 07:46:03 -0400
To: bug-List-MoreUtils [...] rt.cpan.org
From: Tassilo von Parseval <Tassilo.von.Parseval [...] rwth-aachen.de>
Hi there, Show quoted text
----- Originalnachricht ----- Von: Guest via RT <bug-List-MoreUtils@rt.cpan.org> Datum: Montag, Mai 1, 2006 11:09 pm Betreff: [rt.cpan.org #19024] wishlist: ltsorted, gtsorted
> > Mon May 01 23:09:10 2006: Request 19024 was acted upon. > Transaction: Ticket created by guest > Queue: List-MoreUtils > Subject: wishlist: ltsorted, gtsorted > Owner: Nobody > Requestors: DarGo@sPam.lA > Status: new > Ticket <URL: http://rt.cpan.org/Ticket/Display.html?id=19024 > > > > implement test functions $a < $b < $c and $a > $b > $c , etc. for > largelists these functions would be more efficient than creating a > sortedcopy and comparing the two lists.
So if I get you correctly, these are functions that, given a list, return true if the list is sorted in the given order (lt or gt)? I've added it to the to-do list. Note however that it may take me a couple of months before I can make new CPAN releases as I've just started a new job in NYC and don't yet have a computer (other than the ones on the job which I can't use for CPAN uploads). Cheers, Tassilo
Subject: Operate on a sliding set of pairs
Download (untitled) / with headers
text/plain 927b
I'm finding myself in need of a function to do operation on pairs of elements in a list like so: 0 and 1 1 and 2 2 and 3 3 and 4 and so on For example... # 0 and 1, 1 and 2, 2 and 3. print join ", ", slide { "$a and $b" } (0, 1, 2, 3); This would be useful for performing operations *between* two elements in a list. It replaces loops like this: my $last_thing; for my $thing (@things) { return $last_thing if $thing > $blah; $last_thing = $thing; } With this: my $thing; slide { $thing = $a if $b > $blah } @things; It would be nice to avoid having a whole set of these functions (grep, map, first, etc...) by perhaps having an iterator which can generate pairs without having to create a double side list. my $slider = make_slider \@things; while( my($a, $b) = $slider->next ) { ... } This may be out of scope for List::MoreUtils.
Download (untitled) / with headers
text/plain 246b
If I could add my two cents: I suggest functions 'sorted' (which does a 'cmp' comparison) and 'sorted_num' (which uses <=>). Testing for reverse order can be done as sorted(reverse @a) so it is probably not necessary to add a separate function.
Download (untitled) / with headers
text/plain 199b
Or: sub sorted (&@) { ...; } sub sorted_numerically { unshift @_, sub { $a <=> $b }; goto \&sorted; } sub sorted_alphabetically { unshift @_, sub { $a cmp $b }; goto \&sorted; }
This is a reasonable base function as tobyink showed up for RT#19024's wish ...
Download (untitled) / with headers
text/plain 183b
I know it's a while open ... but can you guys check whether the qsort BLOCK, ARRAY function does the job for you? Please keep in mind - this will never work reasonably for pure-perl.
On Wed Aug 23 05:55:50 2017, REHSACK wrote:
Show quoted text
> I know it's a while open ... but can you guys check whether the qsort
> BLOCK, ARRAY function does the job for you?

That's a neat function, but my request for a "slide" function seems to have been lumped in here by mistake.
Download (untitled) / with headers
text/plain 397b
On Wed Aug 23 17:06:11 2017, MSCHWERN wrote: Show quoted text
> On Wed Aug 23 05:55:50 2017, REHSACK wrote:
> > I know it's a while open ... but can you guys check whether the qsort > > BLOCK, ARRAY function does the job for you?
> > That's a neat function, but my request for a "slide" function seems to have > been lumped in here by mistake.
Oh yeah - but it looks cool. I'll put on on top of new functions ...


This service is sponsored and maintained by Best Practical Solutions and runs on Perl.org infrastructure.

Please report any issues with rt.cpan.org to rt-cpan-admin@bestpractical.com.