Easy way to print Perl array with a little formatting

Question

Is there an easy way to print out a Perl array with commas in between each element   Writing a for loop to do it is pretty easy but not quite elegant    if that makes sense

User · Answer

You can use Data  Dump   use Data  Dump qw dump   my  a    1   2  3    4   gt  5    dump  a     Produces     1   2  3     4   gt  5

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better than Dumper --you re ready for the WWW      use JSON  XS  print encode json   some array

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You can simply print it    a   qw abc def hij    print   a     You will got   abc def hij

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Just use join       assuming  array is your array  print join        array

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If you re coding for the kind of clarity that would be understood by someone who is just starting out with Perl  the traditional this construct says what it means  with a high degree of clarity and legibility    string   join        array  print   string n     This construct is documented in perldoc -fjoin   However  I ve always liked how simple    makes it   The special variable     is for interpolation  and the special variable    is for lists   Combine either one with dynamic scope-constraining  local  to avoid having ripple effects throughout the script   use 5 012 002  use strict  use warnings   my  array   qw  1 2 3 4 5           local                print   array n     Interpolation      OR with      use feature q say   use strict  use warnings   my  array   qw  1 2 3 4 5          local                say  array    List     The special variables    and    are documented in perlvar  The local keyword  and how it can be used to constrain the effects of altering a global punctuation variable s value is probably best described in perlsub   Enjoy

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I ve not tried to run below  though  I think this s a tricky way   map print       array

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This might not be what you re looking for  but here s something I did for an assignment              print   ArrayName n

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Map can also be used  but sometimes hard to read when you have lots of things going on   map  print  element    n       array

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Also  you may want to try Data  Dumper  Example   use Data  Dumper     simple procedural interface print Dumper  foo   bar

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Using Data  Dumper    use strict  use Data  Dumper   my  GRANTstr    SELECT  INSERT  UPDATE  DELETE  LOCK TABLES  EXECUTE  TRIGGER    GRANTstr       s      g  my  GRANTs     split        GRANTstr   print Dumper  GRANTs         n n    print Dumper   GRANTs         n n    print Data  Dumper- gt Dump    GRANTs    qw GRANTs       Generates three different output styles    VAR1    SELECT    VAR2    INSERT    VAR3    UPDATE    VAR4    DELETE    VAR5    LOCK TABLES    VAR6    EXECUTE    VAR7    TRIGGER         VAR1                SELECT              INSERT              UPDATE              DELETE              LOCK TABLES              EXECUTE              TRIGGER                   GRANTs                  SELECT                INSERT                UPDATE                DELETE                LOCK TABLES                EXECUTE                TRIGGER

User · Answer

For inspection debugging check the Data  Printer module  It is meant to do one thing and one thing only      display Perl variables and objects on screen  properly formatted  to   be inspected by a human    Example usage   use Data  Printer    p  array     no need to pass references   The code above might output something like this  with colors                  0   a           1   b           2  undef          3   c

[perl] Easy way to print Perl array? (with a little formatting)

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