Re: [fricas-devel] how to remove "failed"?

2018-05-28 Thread Waldek Hebisch
> > What is going wrong here: > > (1) -> li := [2,4,3,2,5,2,7,2,2,7] > > (1) [2, 4, 3, 2, 5, 2, 7, 2, 2, 7] > Type: List(PositiveInteger) > (3) -> li10 := [recip(i::IntegerMod 10) for i in 0..9] > > (3) ["failed", 1, "failed", 7, "failed", "failed", "failed", "failed", 9] >

Re: [fricas-devel] how to remove "failed"?

2018-05-26 Thread oldk1331
I think this is an interpreter bug, that it automatically coerces a Union type Union(xx, "yy") to its subtype "yy". (Interpreter can handle types like Union(Integer,String) ) You can use the following workaround: remove(x+->x case "failed", l) But the result type is still

Re: [fricas-devel] how to remove "failed"?

2018-05-26 Thread Ralf Hemmecke
(5) -> remove(f, li10)$List(Union(IntegerMod(10),"failed")) (5) [1, 7, 3, 9] Type: List(Union(IntegerMod(10),"failed")) Obviously the interpreter is unable to automatically realise that it should also look inside the exports of

[fricas-devel] how to remove "failed"?

2018-05-26 Thread Prof. Dr. Johannes Grabmeier privat
What is going wrong here: (1) -> li := [2,4,3,2,5,2,7,2,2,7]    (1)  [2, 4, 3, 2, 5, 2, 7, 2, 2, 7] Type: List(PositiveInteger) (2) -> remove(2,li)    (2)  [4, 3, 5, 7, 7]