[Haskell-cafe] Re: Pattern matching, and bugs

2009-12-21 Thread Ben Franksen
Jochem Berndsen wrote: > András Mocsáry wrote: >> *My concern* >> is about predictable failure of sw written in Haskell. >> To illustrate it let's see a Haskell pattern matching example: > >> And in Haskell pattern matching: >> >> switch 1 = "Unchecked" >> >> switch 2 = "Checked" >> >> switch

[Haskell-cafe] Re: Pattern matching, and bugs

2009-12-19 Thread John Lato
> From: Felipe Lessa > > On Fri, Dec 18, 2009 at 02:13:02PM +, John Lato wrote: >> So now the program needs a result of some type (String in your >> example) and gets an undefined, and then immediately crashes >> with an "Exception - undefined" error. > > I think this is the second time this i

[Haskell-cafe] Re: Pattern matching, and bugs

2009-12-18 Thread Maciej Piechotka
On Fri, 2009-12-18 at 13:04 +0100, András Mocsáry wrote: > Hello, > I was advised respectfully to post my query here. > Please, read the whole letter before you do anything, because I tried > to construct the problem step by step. > Also keep in mind, that the problem I query here is more general,

Re: [Haskell-cafe] Re: Pattern matching, and bugs

2009-12-18 Thread Felipe Lessa
On Fri, Dec 18, 2009 at 02:13:02PM +, John Lato wrote: > So now the program needs a result of some type (String in your > example) and gets an undefined, and then immediately crashes > with an "Exception - undefined" error. I think this is the second time this is said in this thread, but pleas

[Haskell-cafe] Re: Pattern matching, and bugs

2009-12-18 Thread John Lato
Hello, > Date: Fri, 18 Dec 2009 13:04:47 +0100 > From: Andr?s Mocs?ry > > > switch 1 =  "Unchecked" > > switch 2 =  "Checked" > > switch 3 =  "Unknown" > > switch x =  "Nothing" > > These general ways really avoid this particular crash, but does something > real bad to the code in my opinion. ..