my %in_a;
my %in_b;
undef @in_a{@a};
undef @in_b{@b};
@a = grep {not exists $in_b{$_}} @a;
@b = grep {not exists $in_a{$_}} @b;

[download]
Update: I guess that I do need the braces after all, as davis noted I didn't run the code. Sorry.

In reply to Re: Remove similar elements in both the array by tilly
in thread Remove similar elements in both the array by Anonymous Monk

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