List all files in a directory given a regular expression / a set of extensions (Matlab)

Question

I have a regular expression defining the filenames of interest. What is the best way to list all files in a directory that match this condition?

My attempt at this i

Answer 1

Suppose you have a cell array with possible extensions, e.g., exts = {'avi','mp4'}. Then you can do the following

f = cellfun( @(x) dir( fullfile( DIR, ['*.',x] ) ), exts, 'UniformOuput', false ); 
result = [f{:}];