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my @ss = ("a","b","c","d");
print $ss[1] 显示为a
print @ss[1,3] 显示为a c
@ss的标量为4
if (@ss < 5)
{
command
}
else
{
command
}
if($date == $today)
{
command;
}
elseif($date == $christmas)
{
command;
}
else
{
command;
}
print "happy unbirthday" unless ($date == $today);
unless ($date != $today)
{
command;
}
else
{
command;
}
IF……ELSE
($date == $today) ? print "Happy B.Day!\n" : print "Happy Day!\n";
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配置PERL的URLList
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