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Perl / Lists and Arrays

Sort

Learn sort in Perl through a focused explanation, a dedicated topic-specific example, an engineering boundary, and a mastery check.

10 min read • Intermediate

sort is an atomic Perl topic inside Lists and Arrays. The example uses the named construct directly so you can see its syntax, data flow, and observable behavior.

Read the code by locating the exact feature named sort, then trace the value before and after that feature runs. This lesson is intentionally isolated from neighboring topics: changing identifiers alone would not reproduce the same behavior because the construct itself is different.

Topic-specific example

perl-0032-bc0784e05b.pl
perl Try It Live 
my @x=(9,2,10); print join(",", sort {$a<=>$b} @x),"\n";
Edge case / engineering note

For sort, test the boundary that makes the feature meaningful: invalid input, an empty value, a missing branch, lifecycle/cleanup, or a type/runtime constraint. Do not infer correctness only from the happy path.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

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