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Itemize ,:  _ _ _ Laminate

,:y adds a leading unit axis to y , giving a result of shape 1,$y . Thus:
   $ ,: 2 3 4
1 3
  An atomic argument in x,:y is first reshaped to the shape of the other (or to a list if the other argument is also atomic); the results are then itemized and catenated, as in (,:x),(,:y) .

The fit conjunction (,:!.f) provides fill specified by the atom f , or the normal fill defined under Take ({.) if f is an empty vector.
 		 

   s=: 3 [ v=: 2 3 4 [ m=: i. 3 3
   (,:s); ($,: s); (,:v); ($,:v); ($,:m); ($,:^:4 v)
+-+-+-----+---+-----+---------+
|3|1|2 3 4|1 3|1 3 3|1 1 1 1 3|
+-+-+-----+---+-----+---------+
The following examples compare the dyadic cases of Append and Laminate:
   a=: 'abcd' [ A=: 'ABCD' [ b=: 'abcdef'
   (a,A) ; (a,:A) ; (a,:b) ; (m,m) ; (m ,: m)
+--------+----+------+-----+-----+
|abcdABCD|abcd|abcd  |0 1 2|0 1 2|
|        |ABCD|abcdef|3 4 5|3 4 5|
|        |    |      |6 7 8|6 7 8|
|        |    |      |0 1 2|     |
|        |    |      |3 4 5|0 1 2|
|        |    |      |6 7 8|3 4 5|
|        |    |      |     |6 7 8|
+--------+----+------+-----+-----+

   t=: i. 3 2 2
   t ; (,/t) ; (,./t) ; (,:/t)
+-----+-----+-------------+-----+
| 0  1| 0  1|0 1 4 5  8  9| 0  1|
| 2  3| 2  3|2 3 6 7 10 11| 2  3|
|     | 4  5|             |     |
| 4  5| 6  7|             | 0  0|
| 6  7| 8  9|             | 0  0|
|     |10 11|             |     |
| 8  9|     |             |     |
|10 11|     |             | 4  5|
|     |     |             | 6  7|
|     |     |             |     |
|     |     |             | 8  9|
|     |     |             |10 11|
+-----+-----+-------------+-----+


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