Hello,

I'm not much sure what's the difference between the two statements below?

use encoding 'utf8';
use utf8;

I have read their documents but not very understandful.

Thanks.

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On 11-01-29 03:27 AM, xiaolan wrote:
> Hello,
>
> I'm not much sure what's the difference between the two statements below?
>
> use encoding 'utf8';
> use utf8;
>
> I have read their documents but not very understandful.
>
> Thanks.
>

`use utf8;` tells the compiler that the script is written in UTF-8.
That's all it does.

`use encoding 'utf8'` tells it the srcipt is in UTF-8, its literal
strings are in UTF-8, and STDIN, STDOUT, and DATA are in UTF-8.

$ perl -Mutf8 -e'print"\x{2022}\n";'
Wide character in print at -e line 1.
•
$ perl -Mencoding=utf8 -e'print"\x{2022}\n";'
•

The second one does not complain about a wide character since STDOUT has
been change to UTF-8.


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Shawn

Confusion is the first step of understanding.

Programming is as much about organization and communication
as it is about coding.

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On Sat, Jan 29, 2011 at 9:46 PM, Shawn H Corey <shawnhcorey [at] gmail.com> wrot=
e:
> On 11-01-29 03:27 AM, xiaolan wrote:
>>
>> Hello,
>>
>> I'm not much sure what's the difference between the two statements below=
?
>>
>> use encoding 'utf8';
>> use utf8;
>>
>> I have read their documents but not very understandful.
>>
>> Thanks.
>>
>
> `use utf8;` tells the compiler that the script is written in UTF-8. That'=
s
> all it does.
>
> `use encoding 'utf8'` tells it the srcipt is in UTF-8, its literal string=
s
> are in UTF-8, and STDIN, STDOUT, and DATA are in UTF-8.
>
> $ perl -Mutf8 -e'print"\x{2022}\n";'
> Wide character in print at -e line 1.
> =E2=80=A2
> $ perl -Mencoding=3Dutf8 -e'print"\x{2022}\n";'
> =E2=80=A2
>
> The second one does not complain about a wide character since STDOUT has
> been change to UTF-8.
>

Thanks for this excellent answer.

Regards.

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