% scanl - scanl for cell arrays
%
% scanl :: 
%    (S,X->S)   ~'scannning function',
%    S          ~'initial value',
%    {[N]->X}   ~'data to scan, sequence of length L'
% -> {[N]->S}.
function Y=scanl(f,y,X), Y=cscanl(f,y,X); end
