[bug] fix parsing mixed-type scalars arrays in bjdata

Author: fangq

loadbj.m

@@ -441,7 +441,12 @@
                 if (iscell(object) && length(object) > 1 && ndims(object{1}) >= 2)
                     catdim = size(object{1});
                     catdim = ndims(object{1}) - (catdim(end) == 1) + 1;
-                    object = cat(catdim, object{:});
+                    if (~all(cellfun(@(e) isa(e, class(object{1})), object(2:end))))
+                        tmp = cellfun(@double, object, 'UniformOutput', false);
+                        object = cat(catdim, tmp{:});
+                    else
+                        object = cat(catdim, object{:});
+                    end
                     object = permute(object, ndims(object):-1:1);
                 else
                     object = cell2mat(object')';

test/run_jsonlab_test.m

@@ -4749,7 +4749,7 @@ function run_jsonlab_test(tests)
     clear sp2d_nd enc_spnd dec_spnd enc_spnd_json dec_spnd_json;
 
     %% --- _ArrayChunks_ with sparse complex arrays (1-D) ---
-    spcpx = sparse([1 3], [2 4], [1+2i 3+4i], 4, 5);  % 2 complex nonzeros
+    spcpx = sparse([1 3], [2 4], [1 + 2i 3 + 4i], 4, 5);  % 2 complex nonzeros
     enc_spcpx1d = jdataencode(spcpx, 'formatversion', 4, 'compression', 'zlib', ...
                               'arraychunks', 2, 'base64', 1, 'prefix', 'x', 'compressarraysize', 1);
     test_jsonlab('complex sparse 1d chunks IsSparse+IsComplex', @savejson, ...