On 2020-05-05 William Michels via perl6-users <perl6-us...@perl.org>
wrote:
> mbook:~ homedir$ perl6 -ne 'put .chop' demo1.txt
> this is a test
> I love Unix
> I like Linux too
> mbook:~ homedir$ perl6 -pe '.chop' demo1.txt
> this is a test,
> I love Unix,
> I like Linux too,
The ``.chop`` method does not mutate its argument, it only returns a
chopped value. If you want to mutate, you need to say so::
raku -pe '.=chop' demo1.txt
Notice that the ``.=`` operator is:
* not specific to ``chop``
* not even specific to calling methods
In the same way that ``$a += 1`` is the same as ``$a = $a + 1``, so
``$a .= chop`` is the same as ``$a = $a.chop``.
So, if you wanted, you could do::
raku -pe '.=uc' # print upper-case
--
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