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A comment on Array Languages: R vs. APL. Parent comment

Re:Array Languages: R vs. APL by kqr on Friday March 22, 2024 @01:30AM (#39787707)
> So if floor is <. you can guess what will be the symbol for roof.

Based on the examples, no, I cannot. It could be either of <: and >.

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Re:Array Languages: R vs. APL by bruturis on Friday March 22, 2024 @05:26AM (#39788838)
You are right, both are good options, the author of J chose >. for ceiling and >: for greater than or equal.
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