adding fromListIO convenience function

Author: bbarker

Foreign/Matlab/Array.hsc

@@ -31,6 +31,7 @@ module Foreign.Matlab.Array (
     -- | array list access
     mxArrayGetList, mxArraySetList,
     mxArrayGetAll, mxArraySetAll,
+    fromListIO,
 
     -- * Struct access
     -- |Structs in Matlab are always arrays, and so can be accessed using most array accessors.
@@ -126,6 +127,13 @@ foreign import ccall unsafe mxDestroyArray :: MXArrayPtr -> IO ()
 freeMXArray :: MXArray a -> MIO ()
 freeMXArray a = withMXArray a mxDestroyArray
 
+-- |Create and populate an MXArray in one go.
+fromListIO :: MXArrayComponent a => [a] -> MIO (MXArray a)
+fromListIO xs = do
+  arr <- createMXArray [length xs]
+  mxArraySetAll arr xs
+  pure arr
+
 -- |The class of standardly typeable array elements
 class MXArrayComponent a where
   -- |Determine whether the given array is of the correct type