Help for this page
my %seen; @$ref = grep { ! $seen{$_->{id}}++ } @$ref;
#!/usr/bin/env perl ... my %seen; @$ref = grep { ! $seen{$_->{id}}++ } @$ref; dd $ref;
[{ id => "a" }, { id => "b" }, { id => "c" }, { id => "b" }] [{ id => "a" }, { id => "b" }, { id => "c" }]