I am trying to write the following list compre开发者_高级运维hension in Haskell and it doesn\'t typecheck. I am new at this and can\'t really figure out why.
Suppose that I have: trait A class B extends A compiled into class files. Later I load those using reflection:
Say I have a function with template type T and two other classes A and B. template <typename T> void func(const T & t)
This paper establishes that type inference (called \"typability\" in the paper) in System F is undecidable. What I开发者_如何学Python\'ve never heard mentioned elsewhere is the second result of the pa
I have a homework question which confused me, really badly. Below is a brief explanation of a question.
I know I cannot derive from an int an开发者_如何学Cd it is not even necessary, that was just one (non)solution that came to my mind for the problem below.
I am unable to fix these typechecking errors in Scala: package junk import org.apache.hadoop.conf.Configuration
Let\'s say that I defined my own data-Type like data MyData = A arg| B arg2| C arg3 How would I write a function (for instance: isMyDataType) that checks wether the given argument is one out of th
I have a custom Sequence type. It is essentially a wrapper for a list plus a boolean flag and I wanted it to emulate usual immutable sequence behavior.
In a project with about 6000 lines of Erlang code but no type -spec() annotation yet I tried the following:
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