Append(,) 是如何工作的？

Question

附加 , 说：

x,y appends items of y to items of x after:

Reshaping an atomic argument to the shape of the items of the other,

Bringing the arguments to a common rank (of at least 1) by repeatedly itemizing (,:) any of lower rank, and

Bringing them to a common shape by padding with fill elements in the manner described in Section II B.

1.是什么意思？第 2 步和第 3 步不这样做吗？ 1. 是否可以从列表中删除并且结果仍然相同（我认为它不能但想了解为什么）？

Answer 1

Reshaping an atomic argument to the shape of the items of the other,

此步骤将重复一个参数，如果它是原子的，这与 "padding with fill elements"（步骤 3.）不同。比较标量 5 与列表 1（即一个元素的列表）：

NB. scalar 5, atomic case (step 1. applies), argument is repeated
   (i. 2 3), 5
0 1 2
3 4 5
5 5 5

NB. list 1, non-atomic case (step 2. and 3. apply), argument is padded
   (i. 2 3), 1
0 1 2
3 4 5
5 0 0

Append(,) 是如何工作的？

How does Append (,) work?

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