nested

问题 I am using javascript and I have nested json object getting from mongodb. "abc": [ { "a": "01AABCE2207R1Z5", "b": "Y", "c": [ { "ca": "A", "cb": "AflJufPlFStqKBZ", "cc": "S008400" }, { "cx": "A", "cy": "AflJufPlFStqKBZ", "cz": "S008400" } ] }, { "a": "01AABCE2207R1Z5", "b": "Y", "c": [ { "ca": "A", "cb": "AflJufPlFStqKBZ", "cc": "S008400" }, { "cx": "A", "cy": "AflJufPlFStqKBZ", "cz": "S008400" } ] } ] Above schema have fixed fields there will no changes in schema. Now I want to make it as

问题 I have two private nested classes that would need to access a private member in another class. I thought about putting the class that needs to access the private member as friend in the accessed class, however I'm getting an error that A::m_nData is private so I can't access it. Anyway of telling the compiler that I need to access the A::m_nData private member within D::DoSomething()? Here is a sample of what I'm trying to do: File A.h class A { class D; public: A(); ~A() {} private: friend

问题 I have two private nested classes that would need to access a private member in another class. I thought about putting the class that needs to access the private member as friend in the accessed class, however I'm getting an error that A::m_nData is private so I can't access it. Anyway of telling the compiler that I need to access the A::m_nData private member within D::DoSomething()? Here is a sample of what I'm trying to do: File A.h class A { class D; public: A(); ~A() {} private: friend

问题 I have the following Python 2.7 code: listOfLists = [] for l1_index, l1 in enumerate(L1): list = [] for l2 in L2: for l3_index,l3 in enumerate(L3): if (L4[l2-1] == l3): value = L5[l2-1] * l1[l3_index] list.append(value) break listOfLists.append(list) with the L1,L2,L3,L4,L5 lists being: L1 = [[0.60, 0.95, 0.38, 1.02, 0.29, 0.43], [0.40, 0.09, 0.87, 0.85, 0.70, 0.46], [0.67, 0.91, 0.66, 0.79, 0.86, 0.06], [0.59, 1.81, 0.05, 1.88, 0.20, 0.48], [0.64, 0.34, 0.37, 1.39, 0.56, 0.27], [0.56, 0.34,

问题 I'd like to group some of my Vue.js methods together in a sort of "submethod" class, but I only seem to be able to have single level methods. For example, if I wanted to have a set of methods dealing purely with button actions: new Vue({ el: '#app', data: { }, methods: { buttonHandlers: { handler1: function() { dosomething; }, handler2: function() { dosomething; } } } }); I would expect to be able to then use something like: <button v-on:click="buttonHandlers.handler1">Click Me</button> but

问题 I have a structure that roughly looks like this: List<ProductLine> -> ID Name ... List<LineOfBusiness> -> ID Name ... List<Watchlist> -> ID Name ReportCount A Watchlist can exist under multiple LoBs but the ReportCount will only be for the count of reports that exist under that LoB for that WatchList. I need them in the structure this way because the count of how many reports exist within a LoB for a given Watchlist is important elsewhere. What I need to do is get a list of the distinct

问题 I have a nested array in PHP: array ( '0' => "+5x", '1' => array ( '0' => "+", '1' => "(", '2' => "+3", '3' => array ( '0' => "+", '1' => "(", '2' => array ( // I want to find this one. '0' => "+", '1' => "(", '2' => "+5", '3' => "-3", '4' => ")" ), '3' => "-3", '4' => ")" ), '4' => ")" ) ); I need to process the innermost arrays here, the one with the comment: "I want to find this one." Is there a function for that? I have thought about doing (written as an idea, not as correct PHP): foreach

问题 I found that there are many if-else statements, especially nested if else statements, these statements make my code less readable. How to reduce the number of if else statements in PHP? My tips are as follows: 1.Use a switch statement when it is suitable; 2.use exit() statement when it is feasible; 3. Use ternary statement when it is feasible; Are there other tips that can reduce if else statements, especially nested if-else statements? 回答1: Refactor your code into smaller work units. Too

问题 I am using Ruby 1.9.2 and the Ruby on Rails v3.2.2 gem. I would like to "nest" the inclusion of modules given I am using the RoR ActiveSupport::Concern feature, but I have a doubt where I should state the include method. That is, I have the following: module MyModuleA extend ActiveSupport::Concern # include MyModuleB included do # include MyModuleB end end Should I state include MyModuleB in the "body" / "context" / "scope" of MyModuleA or I should state that in the included do ... end block?

问题 I've been trying to figure this out all evening but to no avail. I have a JSON structure as follows (coming from another system so I can't change its structure): { "parents":{ "parent":[ { "parentId":1, "children":{ "child":[ { "childId":1, }, { "childId":2, } ] } }, { "parentId":2, "children":{ "child":[ { "childId":1, }, { "childId":2, } ] } } ], "pageNum":1, "pageSize":2 } } However, I can't figure out what the correct structure for the data models should be. I've tried the following but