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I’m on the Wikipedia page for Hindley-Milner type systems, on the section about “let polymorphism”: https://en.wikipedia.org/wiki/Hindley%E2%80%93Milner_type_system#Let-polymorphism I’m a bit confused on this sentence: Ideally, this would be allowed with any use of a bound variable What does that mean exactly? I’m not following the syntax in this section. Thanks!Read more

Let be $ \Sigma=\{0,1\}$ and $ L$ $ =$ $ \{u \in \Sigma^* :$ $ odd\ number\ of\ 0’s\ and\ odd\ number\ of\ 1’s\}$ . How Can I build a regular expression or an automata for this languaje? I have no idea, and I gess $ L$ is not regular, but I vane’t been ableRead more

Is there a data structure or an algorithm or a combination of both to allow me to filter a set of documents based on the number of missing words (compared to another list)? Problem Definition We have a list of documents $ D = \{d_1, d_2, \dots, d_n\}$ . Each document $ d_i$ consists ofRead more

I implemented the classical non-weighted converged version of HITS algorithm. I create a root set and a base set from the root set and then I applied the HITS algorithm and got the authorities and hubs scores. Then what? I am not sure what to do with this information while I rank the pages. IRead more

I have a basic understanding how operators work (bitwise, logical, unary, ternary, etc.), but I am confused how you define what the operator does so the machine knows how to treat the operator when you use it in your code base. Are operators predefined by the compiler and is there a way for me toRead more

I’m writing a neural network and am having trouble with finding the cost to weight gradient. Supposedly the gradient is given by $ \frac{\partial C}{\partial w^l_{jk}} = a^{l-1}_k \partial^l_j$ but I’m having problems with my matrix dimensions. If $ a^{l-1}$ is of dimensions $ [n^{l-1},1]$ , $ \delta^l$ is of dimensions $ [n^{l},1]$ , andRead more

Monads in category theory is defined by triples T, unit, flat⟩. class Monad t where map :: (a -> b) -> (t a -> t b) — functorial action unit :: a -> t a flat :: t (t a) -> t a class KleisliTriple t where unit :: a -> t a flatMap ::Read more

I have a variable Int a to set variable String b. if (a < 6){ b = “A”; } else if (a < 9){ b = “B”; } else if (a < 16){ b = “C”; }else{ b = “D”; } I want to optimize it like the following: array = [“A”, “B”, “C”, “D”];Read more

I’ve seen multiple things called legal in computer science (e.g. problems, solutions), and I’ve interpreted it as valid, meaningful or well-formed but what does it exactly mean and does it have a formal definition?Read more

Is the stable matching problem greedy or Dynamic ? Please anyone can give a strong explanation as i tried to find it on the net but it isn’t available.Read more