CODEWITHSUNDEEP
hashraku
Sergey Suvorov
Sergey Suvorov

Reputation: 93

How to get hash keys in order of their appearance

I have a hash:

use v6;

my %some-hash = a => 0,
                b => 42,
                c => 417;

and I'm trying to get its keys with %some-hash.keys, which returns a Seq of all keys but not in the order in which they were declared. It seems that the order of keys is determined at hash initialization, because it changes if I run the code several times.

Is it possible to preserve the order (a b c)?

P.S. %some-hash.keys.sort will not suffice, since keys are expected to have arbitrary names.

Upvotes: 6

Views: 231

Answers (1)

Elizabeth Mattijsen
Elizabeth Mattijsen

Reputation: 26924

Hash keys are randomly ordered, as you have seen.

There are modules in the ecosystem that could help you get what you want:

Or if these don't do exactly what you want, you can build your own Hash implementation with:

Upvotes: 9

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