将一行Perl代码分成两行的正确方法是什么?

在Perl中,在常规空间中的任何地方都可以使用回车。反斜杠不像某些语言那样使用;只需添加 铬 .

可以使用串联或列表操作在多行上拆分字符串:

print "this is ",
    "one line when printed, ",
    "because print takes multiple ",
    "arguments and prints them all!\n";
print "however, you can also " .
    "concatenate strings together " .
    "and print them all as one string.\n";

print <<DOC;
But if you have a lot of text to print,
you can use a "here document" and create
a literal string that runs until the
delimiter that was declared with <<.
DOC
print "..and now we're back to regular code.\n";

您可以在此处阅读文档 perldoc perlop .

还有一件事 Perl Best Practices :

断开长线: 在运算符前中断长表达式。 喜欢

push @steps, $step[-1]
                  + $radial_velocity * $elapsed_time
                  + $orbital_velocity * ($phrase + $phrase_shift)
                  - $test
                  ; #like that

这是因为你在一个字符串中。可以拆分字符串并使用 . AS:

print "3\n";
print "hello, ".
"world\n";

使用 . ,字符串串联运算符:

$ perl
print "hello, " .
"world\n";ctrl-d
hello, world
$