The bytes of a level series at positions, in that order, as a new series — a BYTE subset:
no value is decoded and none re-quantised, so a client reading the subset through the same
declared window reads exactly the codes the desk wrote. undefined where the text is not
base64 or a position lies outside the series: a malformed frame is not projected into a
well-formed shorter one.
The bytes of a level series at
positions, in that order, as a new series — a BYTE subset: no value is decoded and none re-quantised, so a client reading the subset through the same declared window reads exactly the codes the desk wrote.undefinedwhere the text is not base64 or a position lies outside the series: a malformed frame is not projected into a well-formed shorter one.