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deleted 233 characters in body

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edited Feb 10, 2018 at 12:44

J, 1111 8 bytes

-3 bytes thanks to miles

,.~@]];<;._3[_3~,~

Explanation

J has a cut conjunction - ;.

x(u;._3)y applies verb u to each tile of a regular tiling of y specified by x.

So I just needed to form xfrom the input's right argument by laminating (,:) and use the ] verb to display the subarrays.Try it online!

,.~@]];._3[

Explanation

J has a cut conjunction - ;.

x(u;._3)y applies verb u to each tile of a regular tiling of y specified by x.

So I just needed to form xfrom the input's right argument by laminating (,:) and use the ] verb to display the subarrays.

-3 bytes thanks to miles

<;._3~,~

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created Feb 9, 2018 at 14:18

,.~@]];._3[

Explanation

J has a cut conjunction - ;.

x(u;._3)y applies verb u to each tile of a regular tiling of y specified by x.

So I just needed to form xfrom the input's right argument by laminating (,:) and use the ] verb to display the subarrays.