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|
#!./perl
BEGIN {
chdir 't' if -d 't';
@INC = '../lib';
require './test.pl';
}
use strict;
use warnings;
use vars qw(@array @r $k $v $c);
plan tests => 65;
@array = qw(crunch zam bloop);
(@r) = each @array;
is (scalar @r, 2, "'each' on array returns index and value of next element");
is ($r[0], 0, "got expected index");
is ($r[1], 'crunch', "got expected value");
($k, $v) = each @array;
is ($k, 1, "got expected index of next element");
is ($v, 'zam', "got expected value of next element");
($k, $v) = each @array;
is ($k, 2, "got expected index of remaining element");
is ($v, 'bloop', "got expected value of remaining element");
(@r) = each @array;
is (scalar @r, 0,
"no elements remaining to be iterated over in original array");
(@r) = each @array;
is (scalar @r, 2, "start second iteration over original array");
is ($r[0], 0, "got expected index");
is ($r[1], 'crunch', "got expected value");
($k) = each @array;
is ($k, 1, "got index when only index was assigned to variable");
my @lex_array = qw(PLOP SKLIZZORCH RATTLE);
(@r) = each @lex_array;
is (scalar @r, 2, "'each' on array returns index and value of next element");
is ($r[0], 0, "got expected index");
is ($r[1], 'PLOP', "got expected value");
($k, $v) = each @lex_array;
is ($k, 1, "got expected index of next element");
is ($v, 'SKLIZZORCH', "got expected value of next element");
($k) = each @lex_array;
is ($k, 2, "got expected index of remaining element");
(@r) = each @lex_array;
is (scalar @r, 0,
"no elements remaining to be iterated over in original array");
my $ar = ['bacon'];
(@r) = each @$ar;
is (scalar @r, 2,
"'each' on array inside reference returns index and value of next element");
is ($r[0], 0, "got expected index");
is ($r[1], 'bacon', "got expected value of array element inside reference");
(@r) = each @$ar;
is (scalar @r, 0,
"no elements remaining to be iterated over in array inside reference");
is (each @$ar, 0, "scalar context 'each' on array returns expected index");
is (scalar each @$ar, undef,
"no elements remaining to be iterated over; array reference case");
my @keys;
@keys = keys @array;
is ("@keys", "0 1 2",
"'keys' on array in list context returns list of indices");
@keys = keys @lex_array;
is ("@keys", "0 1 2",
"'keys' on another array in list context returns list of indices");
($k, $v) = each @array;
is ($k, 0, "got expected index");
is ($v, 'crunch', "got expected value");
@keys = keys @array;
is ("@keys", "0 1 2",
"'keys' on array in list context returns list of indices");
($k, $v) = each @array;
is ($k, 0, "following 'keys', got expected index");
is ($v, 'crunch', "following 'keys', got expected value");
my @values;
@values = values @array;
is ("@values", "@array",
"'values' on array returns list of values");
@values = values @lex_array;
is ("@values", "@lex_array",
"'values' on another array returns list of values");
($k, $v) = each @array;
is ($k, 0, "following 'values', got expected index");
is ($v, 'crunch', "following 'values', got expected index");
@values = values @array;
is ("@values", "@array",
"following 'values' and 'each', 'values' continues to return expected list of values");
($k, $v) = each @array;
is ($k, 0,
"following 'values', 'each' and 'values', 'each' continues to return expected index");
is ($v, 'crunch',
"following 'values', 'each' and 'values', 'each' continues to return expected value");
# reset
while (each @array) { }
# each(ARRAY) in the conditional loop
$c = 0;
while (($k, $v) = each @array) {
is ($k, $c, "'each' on array in loop returns expected index '$c'");
is ($v, $array[$k],
"'each' on array in loop returns expected value '$array[$k]'");
$c++;
}
# each(ARRAY) on scalar context in conditional loop
# should guarantee to be wrapped into defined() function.
# first return value will be 0 --> [#90888]
$c = 0;
$k = 0;
$v = 0;
while ($k = each @array) {
is ($k, $v,
"'each' on array in scalar context in loop returns expected index '$v'");
$v++;
}
# each(ARRAY) in the conditional loop
$c = 0;
for (; ($k, $v) = each @array ;) {
is ($k, $c,
"'each' on array in list context in loop returns expected index '$c'");
is ($v, $array[$k],
"'each' on array in list context in loop returns expected value '$array[$k]'");
$c++;
}
# each(ARRAY) on scalar context in conditional loop
# --> [#90888]
$c = 0;
$k = 0;
$v = 0;
for (; $k = each(@array) ;) {
is ($k, $v,
"'each' on array in scalar context in loop returns expected index '$v'");
$v++;
}
# Reset the iterator when the array is cleared [RT #75596]
{
my @a = 'a' .. 'c';
my ($i, $v) = each @a;
is ("$i-$v", '0-a', "got expected index and value");
@a = 'A' .. 'C';
($i, $v) = each @a;
is ("$i-$v", '0-A',
"got expected new index and value after array gets new content");
}
# Check that the iterator is reset when localization ends
{
@array = 'a' .. 'c';
my ($i, $v) = each @array;
is ("$i-$v", '0-a', "got expected index and value");
{
local @array = 'A' .. 'C';
my ($i, $v) = each @array;
is ("$i-$v", '0-A',
"got expected new index and value after array is localized and gets new content");
($i, $v) = each @array;
is ("$i-$v", '1-B',
"got expected next index and value after array is localized and gets new content");
}
($i, $v) = each @array;
is ("$i-$v", '1-b',
"got expected next index and value upon return to pre-localized array");
# Explicit reset
while (each @array) { }
}
my $a = 7;
*a = sub { \@_ }->($a);
($a, $b) = each our @a;
is "$a $b", "0 7", 'each in list assignment';
$a = 7;
($a, $b) = (3, values @a);
is "$a $b", "3 7", 'values in list assignment';
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