Rename stack to concat

src/Data/NumIdr/Array/Array.idr

@@ -289,9 +289,9 @@ enumerate arr = map (\is => (is, index is arr))
                     (rewrite shapeEq arr in getAllCoords $ shape arr)
 
 export
-stack : (axis : Fin rk) -> Array {rk} s a -> Array (replaceAt axis d s) a ->
+concat : (axis : Fin rk) -> Array {rk} s a -> Array (replaceAt axis d s) a ->
         Array (updateAt axis (+d) s) a
-stack axis a b = let sA = shape a
+concat axis a b = let sA = shape a
                       sB = shape b
                       dA = index axis sA
                       dB = index axis sB

src/Data/NumIdr/Matrix.idr

@@ -95,10 +95,10 @@ getColumn c mat = rewrite sym (minusZeroRight m) in indexRange [All, One c] mat
 --------------------------------------------------------------------------------
 
 export
-vstack : Matrix m n a -> Matrix m' n a -> Matrix (m + m') n a
-vstack = stack 0
+vconcat : Matrix m n a -> Matrix m' n a -> Matrix (m + m') n a
+vconcat = concat 0
 
 export
-hstack : Matrix m n a -> Matrix m n' a -> Matrix m (n + n') a
-hstack = stack 1
+hconcat : Matrix m n a -> Matrix m n' a -> Matrix m (n + n') a
+hconcat = concat 1
 

src/Data/NumIdr/Vector.idr

@@ -94,8 +94,8 @@ swizzle p v = rewrite sym (lengthCorrect p)
 
 
 export
-concat : Vector m a -> Vector n a -> Vector (m + n) a
-concat = stack 0
+(++) : Vector m a -> Vector n a -> Vector (m + n) a
+(++) = concat 0
 
 
 export