How to convert multidimensional array into a 2 dimensional array?

Question

Having the following nested array

[[[0, 0], [0, 1], [0, 2], [0, 3], [0, 4], [0, 5]], [[1, 0], [1, 1], [1, 2],   [1, 3], [1, 4], [1, 5]], [[2, 0], [2, 1], [2, 2], [2, 3], [2, 4], [2, 5]], [[3, 0], [3, 1], [3, 2], [3, 3], [3, 4], [3, 5]], [[4, 0], [4, 1], [4, 2], [4, 3], [4, 4], [4, 5]], [[5, 0], [5, 1], [5, 2], [5, 3], [5, 4], [5, 5]]]

I'd like to remove subarray containers until it becomes a 2 dimensional array like:

[[0,0], [5,1], [5,4]...]

.flatten removes everything and I need to keep the groups of 2 within subarrays.

If a is your array you say that you want to produce the array [[0,0], a[5][1], a[5][4]...]. What is the rule for constructing that array? — Cary Swoveland
– Cary Swoveland, Commented Oct 21, 2016 at 15:30
You selected an answer that generates an array beginning [[0, 0], [0, 1], [0, 2]..., but you said it should be [[0,0], [5,1], [5,4]...]. Please explain. — Cary Swoveland
– Cary Swoveland, Commented Oct 21, 2016 at 17:21
The answer below has been marked as correct. The code I typed was only meant to be a brief example of what I needed. — Leo
– Leo, Commented Oct 21, 2016 at 17:51
The downvote was mine. What you need is a better example, say: "given the 2-element array arr = [[ [0,0], [0,1]], [[0,2], [0,3]]] how can I produce the 4-element array [[0,0], [0,1], [0,2], [0,3]]". Note three things: 1) the example is complete (no "..."); 2) the example is no larger than necessary; and 3) I have assigned a variable (arr) to the input object, so readers can use that variable in their answers and comments without having to define it (not necessary for outputs). — Cary Swoveland
– Cary Swoveland, Commented Oct 21, 2016 at 21:23

Oleksandr Holubenko · Accepted Answer · 2016-10-21 14:49:35Z

8

also, next time you can try to read documentation :)

a = [[[0, 0], [0, 1], [0, 2], [0, 3], [0, 4], [0, 5]], [[1, 0], [1, 1], [1, 2],   [1, 3], [1, 4], [1, 5]], [[2, 0], [2, 1], [2, 2], [2, 3], [2, 4], [2, 5]], [[3, 0], [3, 1], [3, 2], [3, 3], [3, 4], [3, 5]], [[4, 0], [4, 1], [4, 2], [4, 3], [4, 4], [4, 5]], [[5, 0], [5, 1], [5, 2], [5, 3], [5, 4], [5, 5]]]

a.flatten(1)
>[[0, 0], [0, 1], [0, 2], [0, 3], [0, 4], [0, 5], [1, 0], [1, 1], [1, 2], [1, 3], [1, 4], [1, 5], [2, 0], [2, 1], [2, 2], [2, 3], [2, 4], [2, 5], [3, 0], [3, 1], [3, 2], [3, 3], [3, 4], [3, 5], [4, 0], [4, 1], [4, 2], [4, 3], [4, 4], [4, 5], [5, 0], [5, 1], [5, 2], [5, 3], [5, 4], [5, 5]]

answered Oct 21, 2016 at 14:49

Oleksandr Holubenko

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