I'd like to propose as a part of stdlib:
HEAD=:1 :0
assert 0=nc<'m'
[:echo m{.1 1}._1 _1}.":@<
)
Why?
Well, by default, git merge conflicts look like this:
<<<<<<< HEAD
NB. before
=======
NB. after
>>>>>>> branchname
And, quite often, that is syntactically valid J.
But with only a tiny amount of work, we can make that be invalid.
Meanwhile, another issue is that sometimes 9!:37 is set so that you
can't see enough of the result.
So this would be a slightly useful gain on two fronts, for almost no effort:
It would make a git merge conflict so that it would typically force an
error, somewhere in the code:
<<<<<<< HEAD
|assertion failure: assert
| assert 0=nc<'m'
It would also give you a way of displaying the top of a result if you
have (reasonably) set your output control to only display the bottom
of large results:
9!:36''
0 256 0 222
9!:37]0 256 0 2
i.3 3
...
3 4 5
6 7 8
2 HEAD i.3 3
0 1 2
3 4 5
That said, if you wanted to get fancy, you could do a more elaborate
version where verb left arguments are allowed but < is specifically
forbidden (because of git).
I'm sending this to beta forum rather than programming, because it's
not about the code itself but about a potential change to J.
I'm thinking the risks here are low, and the benefits are valid.
Thanks,
--
Raul
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