I have this code: datatype \'a tree = Leaf of \'a | Node of \'a * \'a tree * \'a tree | Nil; val rec tree_sum = fn(f,e,Nil) => e
i have this datatype datatype e = X | Const of int | P 开发者_StackOverflow中文版of e*e | S of e*e | M of e*e | D of e*e;
I\'m new to ML and with to have a function that receives a special pre-defined datatype, and able to reference to its entire argument datatype, rather its components.
I have to code a function that receives a sequence (finite or infinite) and returns an identical sequencewith the only difference that if an exception occurs during the sequence then the function ret
Ok, a while ago I read about a Re-factoring Browser for I think, Lisp (or maybe it was smalltalk). This was a tool to help with re-factoring.
It is well known that Haskell-style typeclasses and ML-style modules offer different mechanisms for specifying interfaces. They are (possibly) equivalent in power, but in practice each has their own b
董加贝 2021-05-28 19:28 开发者_如何学Python相差2ml，可以忽略不计M37****1458 2021-05-28 19:33
大家好，小生来为大家讲解下。6500ml脂肪等于多少斤，5000ml脂肪是多少斤很多人还不知道，现在让我们一起来看看吧！
Could anyone explain to me what are the differences between data/type constructors and functions? Haskell mix 开发者_开发百科them and give us a universal interface (all looks like functions, in partic
I want t开发者_运维技巧o define a list of ints and floats, where [1,2.0] should be a valid construction.
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