这个Perl代码如何将字符串拆分成三个字符的块?

I a*_* am 1 regex perl split

我有一个字符串,我需要分成三个字符的块.谷歌搜索发现以下代码,工作正常:

$input = "DEADBEEF";
@output = ();
my @output = ( $input =~ m/.{3}/g );
print $_."\n" foreach (@output);
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我是Perl初学者; 有人可以向我解释一下表达式的$input =~ m/.{3}/g作用吗?

Que*_*tin 6

$input - scalar variable
=~     - apply regular expression
m      - Match (in list context so return a list of matched substrings)
/      - start of expression
.      - any character
{3}    - 3 times
/      - end of expression
g      - globally
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