transfun | Merging loops for speed in JavaScript | Transpiler library

I am trying to write a function that takes a cell array of functions as an input and that outputs the same functions, but in a somewhat different format.

Specifically, I want a row vector, of say length N, of functions fVec = [f1(x, y, z), f2(x,y,z), ..., fn(x, y, z)] all of which always output a column vector of the same length, say M. Now I want the evaluation of fVec(x, y, z) to output an MXN matrix, where each column represents the output of its corresponding vector.

However, because Matlab doesn't accept regular function handle arrays, it must be done using cell arrays. (, right?)

Moreover, I want a general function that works for several sets of functions, that don't necessarily have three inputs. That is, I want the function fVec(1, ..., x) = [f1(1, ..., x), f2(1, ..., x), fn(1, ..., x)], meaning that each of the funtions f1, f2, fn always have the same number of inputs.

Therefore, I need some function that takes as an input a cell array of function handles {f1(1, ..., x), f2(1, ..., x), fn(1, ..., x)} and outputs some overarching function fVec(1, ..., x).

I already tried writing a function that I thought should do this:

I have a list of rasters of varying sizes but the same dimensions and resolution. I am trying to mosaic them together to create one raster since I have to calculate Euclidean distance and it doesn't make sense when they are fragmented. I've read other questions on raster mosaic-ing (e.g. adding names(ras_list)<-NULL and ras_list <- ras_list[lapply(ras_list,length)>0]) but I keep receiving the message

"Error in matrix(unlist(ini), ncol = 2, byrow = TRUE) : 'data' must be of a vector type, was 'NULL' Calls: do.call ... .rasterObjectFromFile -> .rasterFromRasterFile -> readIniFile -> matrix"

my code snippet: