Re: [Jprogramming] Identity for = and ~:

2021-05-13 Thread Roger Hui
> … but there are still people working as “programmers” who obviously don’t know this > I’ve seen code segments featuring test clauses like > if (mybool == true) > embarrassingly often From *Some Exercises in APL Language Design *, §28: *28. A

Re: [Jprogramming] Identity for = and ~:

2021-05-13 Thread Hauke Rehr
that significant subdomain would be {0,1} in this domain, • both 0&= and =&0 are synonymous with -. while 1&= and =&1 are synonymous with ] • 0&~: and ~:&0 are synonymous with ] while 1&~: and ~:&1 are synonymous with -. • on a sidenote, ⟨=~ x⟩ is =’s identity element here ⟨~:~ x⟩ is ~:

Re: [Jprogramming] Identity for = and ~:

2021-05-13 Thread Roger Hui
Not for any y. For y in a significant subdomain of f. On Thu, May 13, 2021 at 11:10 AM Elijah Stone wrote: > The identity elements for = and ~: are 1 and 0 respectively, as > illustrated by: > > =/'' > 1 > ~:/'' > 0 > > > I expect the identity element for some function f to be the valu

[Jprogramming] Identity for = and ~:

2021-05-13 Thread Elijah Stone
The identity elements for = and ~: are 1 and 0 respectively, as illustrated by: =/'' 1 ~:/'' 0 I expect the identity element for some function f to be the value x such that, for any y, y -: y f x. But this is clearly not the case here. Why not? ---

[Jprogramming] J903 - linux glibc version

2021-05-13 Thread Eric Iverson
(in programming for initial visibility - all discussion should be in beta) Change in linux JE binaries: Before J903-beta-i, Jsoftware built linux JE on Mint 18. Now we build linux JE on Mint 20.1. Unfortunately these new binaries will not run on older linux systems as they require libm.so.6: ve