nodejs 23 node-js 23 node 23 javascript 23 check 23 type 23 test 23 isvalid 23 validate 23 ndarray 23 stdlib 23 stdassert 23 assertion 23 assert 23 utilities 23 utility 23 utils 23 util 23 is 23 isndarray 23 2d 13 ismatrix 13 matrix 13 square 8 symm 7 symmetric 7 double 6 double-precision 6 single-precision 6 float 6 single 6 vector 5 isvector 5 vec 5 1d 5 nd 4 array 4 bisymmetric 4 mat 4 skew-symmetric 3 skew 3 complex128array 3 complex128 3 float32array 3 float32 3 float64array 3 float64 3 complex64array 3 complex64 3 centrosymmetric 2 persymmetric 2 antisymmetric 1 antimetric 1 nonsymmetric 1 asymmetric 1