On Tue, 4 Jun 2019 16:40:47 +0000, Seymour J Metz wrote: >> Can a program knowing none of this except that unknown members of X. >> have been manipulated discover with IRXEXCOM that: > >Yes. > How, after "... a stem is used as the target of an assignment [and] all possible compound variables whose names begin with that stem receive the new value ..." (TSO Rexx reference) and a random symbol with that stem is then dropped, does IRXEXCOM report the otherwise unidentified tail?
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