Join
Join[list1,list2,…]
concatenates lists or other expressions that share the same head.
Join[list1,list2,…,n]
joins the objects at level n in each of the listi.
Details

- The listi do not need to have head List, but must all have the same head.
- Join works on Association objects, keeping the last value associated with any given key.
- Join works on SparseArray objects by effectively concatenating the corresponding ordinary lists. »
- Join[list1,list2,…,n] handles ragged arrays by effectively concatenating all successive elements at level n in each of the listi. »
Examples
open allclose allScope (4)
Generalizations & Extensions (2)
Applications (2)
Augment a matrix by adding a row:
This can also be done with ArrayFlatten:
Neat Examples (2)
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