I'm trying to learn haskell after years of OOP. I'm reading Happy Haskell. It provides this code:I understand how plus and plus' work (they're the same, different syntax). But increment, I don't get.
Scratching at the surface of Haskell's type system, ran this:Somehow, despite en and ec have different types, they both test True on == e. I say "somehow" not because I am surprised (I am not), but because I don't know what is the name of rule/mechanism that allows this. It...
In a very simple module test where I have the following functionSince I have explicit type annotations, I expect to get [3,5,7] when I load the module test and call func in ghci. However, I got
An x86 CPU have some instructions that deal with integers and floating-point numbers.For example: the INC instruction increments an integer (which can be stored in memory or in a register) by 1, so the INC instruction "knows" that it should interpret the bits that it is manipulating as an integer....
I am approaching the Haskell programming language, and I have a background of Scala and Java developer.
I'm trying to get better at playing "type tetris". I have the functions:And GHCi tells me:I'm having a hard time figuring out how to arrive at that final signature from the first two. My intuition (for lack of a better word) is saying that the first argument of =<< namely...
I am studying Haskell the hard way, by trying to write something I find interesting, and right now I'm trying to figure out how to derive a Semiring in Haskell for a specific set of parsing problems:
I came across this and am curious as to why is it not possible to use the is operator to discern between bool and Nullable<bool>? Example;
So I'm doing this:I would have expected bar to have the type int. But instead I'm getting an error:error C2039: value_type: is not a member of std::iterator_traits<_Ty *const >
I've seen this kind of declaration in jdk 8 sample:But when I tried to add value to "map", I didn't succeed: