Yes. You don't learn J from a reference card. [That is, normal people
don't. 50 years ago I was reading the error-message manuals for PL/I
and I learned a lot from them]
I see 3 main uses:
1. What's the primitive to do outfix?
2. How do I debug?
3. What's in J, anyway?
The last is the only one that really calls for completeness. I hope
that readers will spend some idle moments perusing the Card and see
corners of J that they had not known of. This is the reason to add the
Special Combination Hauke asked for: if you don't get a laugh from (#\
y) you just don't understand J.
Henry Rich
On 8/9/2022 7:13 PM, Raul Miller wrote:
2?.8
2 4
Uninflected ? might need a footnote (or should maybe be elided --
that's possibly not the sort of information a person would value from
the reference card).
I imagine that the reference card's primary value for me would be
reminding me of operations which I had forgotten and a way of quickly
identifying details which distinguish similar operations. It's not
going to be a tutorial...
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