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idiom goes beyond syntactical or structural form. Here are two definitions from the OED (the second and third major ones; using the 1971 compact edition):

  • the specific character, property, or genius of any language; the manner of expression which is natural or peculiar to it.
  • a form of expression, grammatical construction, phrase, etc., peculiar to a language; a peculiarity of phraseology approved by the usage of a language, and often having a significance other than its grammatical or logical one

The first definition there, applied to Perl, might be things like using $_ and @_ to write concisely (Effective Perl Programming item 7). The second definition would mean things like while (<FH>) { do_stuff } (although technically that is approved by the design, rather than the usage, of the language) or perhaps things like naming conventions. A non-Perl example would be Hungarian Notation in C++. The Perl community has things like that too.

Stuff like the Schwartzian Transform could be considered idiomatic also, or the practice of returning undef for false (which, incidentally, will change in Perl6).


for(unpack("C*",'GGGG?GGGG?O__\?WccW?{GCw?Wcc{?Wcc~?Wcc{?~cc' .'W?')){$j=$_-63;++$a;for$p(0..7){$h[$p][$a]=$j%2;$j/=2}}for$ p(0..7){for$a(1..45){$_=($h[$p-1][$a])?'#':' ';print}print$/}

In reply to Re: "Native Perlish" by jonadab
in thread "Native Perlish" by spurperl

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