*********************
  loaddefs link  d_Qndfs  'arrays nested.ndf'  - operators for nested arrays
     default standard : [ary, nry, sub]Phr, [idx, ndx]IntLL
        [Phr, IntLL] suffexs are dropped from [op, var]Names
        these callByName ops should save [huge, redundant] value-passing
     alternate callBy[Value, Str] ops - [ary, nry, sub]Val, [idx, ndx]Str
        [Value, Str] suffexs are dropped within op definitions
        simpler for smaller [nry, sub], not for recursion etc, although I've retained what I did
     WARNING! use <opNam>_chkAppOp  for developments to [trap, report] errors
  +-----+
  Setup  
     Predefine local ops to avoid sequencing problems with initial qnial loaddefs  
  +-----+
  to (conversions)
  idxIntL_to_idxStr  IS OP  idxIntL  - idxIntL to idxStr format
  idxStr_to_idxIntL  IS OP  idxStr  - idxStr to idxIntL format
  nry_ndx_toLocal_nry_ndx_idx  IS OP  nry  ndx  - conversion
  nryVal_ndxInt_toLocal_nry_ndx_idx  IS OP  nryVal  ndxStr  - 
     conversion with [nryVal, ndxStr] output
  ndx_idx_localTo_ndx  IS OP  ndxLocal  idxLocal  - conversion
  ndxStr_idx_localTo_ndx  IS OP  ndxLocalStr  idxLocal  - conversion
  nryShp_subShp_idx1st_get_bolFit  IS OP  nryShp  subShp  idx1st  - 
     l (true) if shape fits, o (false) otherwise
  +-----+
  callBy[Name, IntLL] : default standard : [ary, nry, sub]Phr, [idx, ndx]IntLL
     so [Phr, IntLL] suffexs are dropped from [op, var]Names
     these callByName ops should save [huge, redundant] value-passing
  nry_ndx_get_itm  IS OP  nry  ndx  - returns itm at ndx
  nryVal_ndxStr_get_itm  IS OP  nryVal  ndxStr  - returns itm at ndxStr
  nry_itm_ndxInn_get_ndxL_recurse  IS OP  nry  itm  ndxInn  - ONLY for nry_itm_get_ndxL!!
     recurse nry_itm_get_ndxL in depth, returns OR[null (not found), ndxOut]
  nry_itm_get_ndxL  IS OP  nry  itm  - returns OR(ndxL, faultL)  
     ndxL = all positions of itm in nry,  makes use of recursive search
  nry_sub_get_ndx1stL  IS OP  nry  sub  - ndxL of 1st item of sub that "fits" in nested nry
     "current-depth-ONLY" version, uses ary_sub_get_idx1stL
     "across-depth-ONLY"  version has not been created yet 29Mar2024