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Re^3: adding items, but with interim results

by LanX (Canon)
on Oct 17, 2013 at 23:30 UTC ( #1058683=note: print w/ replies, xml ) Need Help??


in reply to Re^2: adding items, but with interim results
in thread adding items, but with interim results

IMHO it's not state which is buggy but rather map.

see this

DB<168> sub tst (&@) { my $cr=shift; print $cr->($_)," " for @_ } DB<169> use feature 'state'; tst {state $i++} 1..3 for 1..3 => "" 0 1 2 0 1 2 0 1 2

The blocks of map and grep are no anonymous subroutines as Tobyink pointed out recently.

IMHO thats why scoping fails in your tests.

DB<173> use feature 'state'; map {state $i++; print "$i "} 1..3 for +1..3 => "" 1 2 3 4 5 6 7 8 9

(at least with 5.10)

udate

also while conditions

DB<195> use feature 'state'; for (1..3) { $y=0;while (++(my $x)) { p +rint " $x .";last if $y++>3 } } => "" 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . DB<196> use feature 'state'; for (1..3) { $y=0;while (++(state $x)) +{ print " $x .";last if $y++>3 } } => "" 1 . 2 . 3 . 4 . 5 . 6 . 7 . 8 . 9 . 10 . 11 . 12 . 13 . 14 . 15 .

Cheers Rolf

( addicted to the Perl Programming Language)


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