以下Perl 程序的输出结果是下列哪个选项? my %h1 = ( "red" => ‘1’, "green" => ‘2’, "yellow" => ‘3’, ); my @colors = keys %h1; foreach $color (@colors){ print "$color => $h1{$color} "; } my @numbers = values %h1; foreach my $n(@numbers){ print "$n/"; }
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以下Perl程序的输出结果是下列哪个选项?
my %h1 = (
"red" => ‘1’,
"green" => ‘2’,
"yellow" => ‘3’,
);
my @colors = keys %h1;
foreach $color (@colors){
print "$color => $h1{$color} ";
}
my @numbers = values %h1;
foreach my $n(@numbers){
print "$n/";
}
keys此函数以列表形式返回哈希的所有键。键以随机顺序返回,但是实际上,它们与值和每个值使用相同的顺序。
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以上就是关于问题以下Perl 程序的输出结果是下列哪个选项? my %h1 = (
"red" => ‘1’, "green" => ‘2’, "yellow" => ‘3’,
);
my @colors = keys %h1;
foreach $color (@colors){
print "$color => $h1{$color} ";
}
my @numbers = values %h1;
foreach my $n(@numbers){
print "$n/";
}的答案
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