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Returns if member is a member of the set stored at key.

@return

@integer-reply, specifically:

  • 1 if the element is a member of the set.
  • 0 if the element is not a member of the set, or if key does not exist.

@examples

SADD myset "one"
SISMEMBER myset "one"
SISMEMBER myset "two"

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