这两个 Perl 片段有什么区别? [英] What's the difference between these two Perl snippets?

问题描述

print <<EOF
stuff
EOF
;


print <<EOF;
stuff
EOF

你为什么要使用一个?

推荐答案

这两个示例在行为上等同于同一件事，但请考虑在打印该块后是否还想做其他事情:

Those two examples amount to the same thing behaviourally, but consider if you wanted to do something else after printing that block:

print <<EOF
stuff
EOF
. "more text here";

...或者您可能需要测试操作的结果:

...or maybe you need to test the result of the operation:

print $unstable_filehandle <<EOF
stuff
EOF
or warn "That filehandle finally disappeared: $!";

这些示例是人为设计的，但您可以看到有时灵活处理文本块后面的代码会很有用.

These examples are contrived, but you can see how sometimes it can be useful to be flexible about what code comes after the block of text.

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