如何在 Perl 中用递增的数字替换令牌? [英] How do I replace a token with increasing numbers in Perl?

问题描述

我想用数字替换文本文件中的标记.令牌是"，我希望将其替换为到目前为止的计数数.例如:

I want to replace a token in a text file with a number. The token is "<count>" and I want it to be replaced with the number of counts so far. For example:

This <count> is a <count> count.
The <count> count increases <count><count><count>.
<count><count><count><count><count><count>

变成:

This 1 is a 2 count.
The 3 count increases 456.
789101112

我不确定如何执行此操作，也许需要一些循环?

I'm not really sure how to do this, maybe with some loop?

my $text = (the input from file, already taken care of in my script);
my $count = 1;
while( regex not found? )
{
    $text =~ s/<count>/($count);
    $count ++;
}

推荐答案

my $text = "whatever";
my $count = 1;
$text =~ s/<count>/$count++/ge;

应该为你做.替换末尾的/e 使一切变得不同.

should do it for you. The /e at the end of the substitution makes all the difference.

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