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Related Syntax | ||
operator |
is referent |
Return type: Switch
Returns: Returns true if the stream is attached to a referent and false otherwise. Replacing is
with isnt
will reverse the results.
Syntax
stream-name indexer? (is | isnt) referent
Tests whether the specified stream is attached to a referent.
Note that if a stream is bound to a previously defined referent and then discarded, that referent still exists, but is no longer attached.
Related Syntax |
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