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Re^4: Problem with escape sequence \x for hex with spaces "\x{ 263A }" (update: codepage)

by LanX (Sage)
on Jun 11, 2022 at 10:37 UTC ( #11144689=note: print w/replies, xml ) Need Help??


in reply to Re^3: Problem with escape sequence \x for hex with spaces "\x{ 263A }"
in thread Problem with escape sequence \x for hex with spaces "\x{ 263A }"

I think you need to append 'O' for "Output" to the '-C'

(my CMD-terminal has CP 850 so no emojis, sorry °)

C:\tmp>perl -we" binmode STDOUT, ':utf8'; print qq[\x{263A}] " Ô˙&#9553; C:\tmp>perl -CO -wde0 ... main::(-e:1): 0 DB<1> print "\x{263A}" Ô˙&#9553; DB<2>

UPDATE (codepage)

°) ah found the way to change the codepage

C:\tmp>CHCP 65001 Aktive Codepage: 65001. C:\tmp>perl -CO -wde0 ... yadda yadda ... DB<1> print "\x{263A}" &#9786; DB<2>

PM's codeblocks are limited here˛, thats what I see ---> ☺ (sic)

update (pre tags)

˛) or with <pre><tt> tags instead


C:\tmp>perl -CO -wde0

...

  DB<1> print "\x{263A}"
☺
  DB<2>

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

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Re^5: Problem with escape sequence \x for hex with spaces "\x{ 263A }" (update: codepage)
by kcott (Archbishop) on Jun 11, 2022 at 19:03 UTC

    I don't use the debugger (except in exercises like this) so it's more trial and error than knowledge for me. Anyway, I found the issue actually revolves around whether p or print is used.

    $ perl -C -de1
    ...
      DB<1> print "\x{263A}"
    ☺
      DB<2> p "\x{263A}"
    Wide character ...
    ...
    ☺
    

    My guesswork here was based on a long-standing alias of mine:

    $ alias perlu alias perlu='perl -Mstrict -Mwarnings -Mautodie=:all -Mutf8 -C -E'

    For example:

    $ perlu 'say for $], "\x{263A}", "\x{ 263A }"'
    5.036000
    ☺
    ☺
    

    Update (checking for false positives):

    $ perl -de1
    ...
      DB<1> print "\x{263A}"
    Wide character ...
    ...
    ☺
    
    $ alias perle alias perle='perl -Mstrict -Mwarnings -Mautodie=:all -MCarp::Always -E +'
    $ perle 'say for $], "\x{263A}", "\x{ 263A }"'
    5.036000
    Wide character in say at -e line 1.
    ☺
    Wide character in say at -e line 1.
    ☺
    

    — Ken

      > whether p or print is used.

      good and weird catch.

      I can reproduce that with -CO on windows

          
      C:\tmp>perl -CO -de0
      
      ...
      
        DB<1> p "\x{263A}"
      Wide character in print at (eval 15)c:/nonBKU/strawberry-perl-5.32.1.1-64bit-portable/perl/lib/perl5db.pl:738 line 2.
      ...
      
      ☺
        DB<2> print "\x{263A}"
      ☺
        DB<3> q
      

      I know that p is a hardcoded command and the debugger is fiddling with IO to ensure that debugged program and interactions don't mess with each other.

      Still surprising, hope I find time to look into this.

      > I don't use the debugger

      pity, it's pretty close to a REPL, and both python and ruby come with easy REPLs

      Cheers Rolf
      (addicted to the Perl Programming Language :)
      Wikisyntax for the Monastery

Re^5: Problem with escape sequence \x for hex with spaces "\x{ 263A }"
by Your Mother (Archbishop) on Jun 11, 2022 at 10:55 UTC

    Worked a treat on Mac.

    ~>perl -CO -wde0
    # ...
    main::(-e:1):	0
      DB<1> print "\x{263A}"
    ☺
    

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