=BUILTINS.X()
-> {"XIRR",XIRR;"XLOOKUP",XLOOKUP;...}
DEFINE(
BUILTINS.X,
LAMBDA(
VSTACK(
HSTACK("XIRR", XIRR),
HSTACK("XLOOKUP", XLOOKUP),
HSTACK("XMATCH", XMATCH),
HSTACK("XNPV", XNPV),
HSTACK("XOR", XOR))))
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