How to convert a Sequences to a set efficiently

[the anh pham]

Dear all,

Does anyone know how to convert a Sequences to a Set effectively or/and quickly or/and simply?

Thank you very much. 

Best regards,

TA

[Stephan Merz]

Hi The Anh,

if you want to construct the set of the elements (i.e., the co-domain) of a sequence you can define

Range(s) == { s[i] : i \in DOMAIN s }

Of course, you lose the information on the order and the multiplicity of the elements in the original sequence.

Hope this helps,

Stephan

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