perl - 将Perl代码分成两行的正确方法是什么？

$ cat temp.pl
use strict;
use warnings;

print "1\n";
print "hello, world\n";

print "2\n";
print "hello,
world\n";

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

$ perl temp.pl
1
hello, world
2
hello,
world
3
hello,
world
$

为了使我的代码易于阅读，我想将列数限制为80个字符。如何将一行代码分成两部分而没有任何副作用？

如上所示，简单的↵或\无效。

什么是正确的方法？

最佳答案

在Perl中，回车将在常规空间所在的任何地方使用。反斜杠不像某些语言那样使用。只需添加一个CR。

您可以使用串联或列表操作将字符串分成多行:

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perldoc perlop中阅读有关此处的文档。

关于perl - 将Perl代码分成两行的正确方法是什么？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/3984769/