currying

问题 Tried to create a function mapping numeric characters (i.e. '0' to '9') to true and other characters to false : const isNumeric = String.prototype.includes.bind('0123456789'); isNumeric('1') and isNumeric('0') returned true . Expected ['1', '0'].every(isNumeric) to be true too but it turned out to be false. Something I'm missing? This was on node v10.16.3 回答1: includes has a second parameter called position which is the position within the string at which to begin searching. every , like

问题 Tried to create a function mapping numeric characters (i.e. '0' to '9') to true and other characters to false : const isNumeric = String.prototype.includes.bind('0123456789'); isNumeric('1') and isNumeric('0') returned true . Expected ['1', '0'].every(isNumeric) to be true too but it turned out to be false. Something I'm missing? This was on node v10.16.3 回答1: includes has a second parameter called position which is the position within the string at which to begin searching. every , like

问题 Control.Category.Constrained is a very interesting project that presents the class for cartesian closed categories - Curry. Yet, I do not see why we think of all cartesian closed categories which allow curry and uncurry ( Hom(X * Y, Z) ≅ Hom(X, Z^Y) in terms of category theory). Wikipedia says that such property holds only for locally small cartesian closed categories. Under this post many people suggest that Hask itself is not locally small (on the other hand, everyone says that Hask is not

问题 Control.Category.Constrained is a very interesting project that presents the class for cartesian closed categories - Curry. Yet, I do not see why we think of all cartesian closed categories which allow curry and uncurry ( Hom(X * Y, Z) ≅ Hom(X, Z^Y) in terms of category theory). Wikipedia says that such property holds only for locally small cartesian closed categories. Under this post many people suggest that Hask itself is not locally small (on the other hand, everyone says that Hask is not

问题 I have a definition of next methods: def add1(x: Int, y: Int) = x + y def add2(x: Int)(y: Int) = x + y the second one is curried version of first one. Then if I want to partially apply second function I have to write val res2 = add2(2) _ . Everything is fine. Next I want add1 function to be curried. I write val curriedAdd = (add1 _).curried Am I right that curriedAdd is similiar to add2 ? But when I try to partially apply curriedAdd in a such way val resCurried = curriedAdd(4) _ I get a

问题 I have a definition of next methods: def add1(x: Int, y: Int) = x + y def add2(x: Int)(y: Int) = x + y the second one is curried version of first one. Then if I want to partially apply second function I have to write val res2 = add2(2) _ . Everything is fine. Next I want add1 function to be curried. I write val curriedAdd = (add1 _).curried Am I right that curriedAdd is similiar to add2 ? But when I try to partially apply curriedAdd in a such way val resCurried = curriedAdd(4) _ I get a

问题 I have a definition of next methods: def add1(x: Int, y: Int) = x + y def add2(x: Int)(y: Int) = x + y the second one is curried version of first one. Then if I want to partially apply second function I have to write val res2 = add2(2) _ . Everything is fine. Next I want add1 function to be curried. I write val curriedAdd = (add1 _).curried Am I right that curriedAdd is similiar to add2 ? But when I try to partially apply curriedAdd in a such way val resCurried = curriedAdd(4) _ I get a

问题 I have a definition of next methods: def add1(x: Int, y: Int) = x + y def add2(x: Int)(y: Int) = x + y the second one is curried version of first one. Then if I want to partially apply second function I have to write val res2 = add2(2) _ . Everything is fine. Next I want add1 function to be curried. I write val curriedAdd = (add1 _).curried Am I right that curriedAdd is similiar to add2 ? But when I try to partially apply curriedAdd in a such way val resCurried = curriedAdd(4) _ I get a

问题 I love that ECMAScript 6 allows you to write curried functions like this: var add = x => y => z => x + y + z; However, I hate that we need to parenthesize every argument of a curried function: add(2)(3)(5); I want to be able to apply curried functions to multiple arguments at once: add(2, 3, 5); What should I do? I don't care about performance. 回答1: Currying and the application of curried functions are controversial issues in Javascript. In simple terms, there are two opposing views, which I

问题 const makeIncrementer = s=>a=>a+s makeIncrementer(10).toString() // Prints 'a=>a+s' which would make it impossible to de-serialize correctly (I would expect something like a=>a+10 instead. Is there a way to do it right? 回答1: This is a great question. While I don't have a perfect answer, one way you could get details about the argument/s is to create a builder function that stores the necessary details for you. Unfortunately I can't figure out a way to know which internal variables relate to