nested

问题 I use myBatis to map a simple database (as an example). It consists of 4 models: User , Car , Tariff , Insurance . User has private List carList and private Tariff tariff and some other fields with getters and setters. Car has private Insurance insurance and some other fields with getters and setters. So I can map only 1st nesting level. I mean i can map User and its fields - Tariff and a List of Cars . But I can't map Insurance field of Car . What should I do? Here is my mapper.xml: <?xml

问题 Let's say I have a nested resource like in the Rails guide example: http://guides.rubyonrails.org/routing.html#nested-resources resources :magazines do resources :ads end This routes a call to /magazines/newsweek/ads to the AdsController#index. It requires a magazine_id in the URL...how should I go about creating a view that is based off of a template used for Ads#index yet also includes the context of the parent resource? For example, all parent resources that have Ads will have a table list

问题 I want to iterate through a file and put the contents of each line into a deeply nested dict, the structure of which is defined by leading whitespace. This desire is very much like that documented here. I've solved that but now have the problem of handling the case where repeating keys are overwritten instead of being cast into a list. Essentially: a: b: c d: e a: b: c2 d: e2 d: wrench is cast into {"a":{"b":"c2","d":"wrench"}} when it should be cast into {"a":[{"b":"c","d":"e"},{"b":"c2","d"

问题 I'm new to programming. I have a form application that launches a thread. Form there 4 new threads are launched. Each of these threads performs a series of command line processes like the following: ProcessStartInfo startInfo = new ProcessStartInfo(); startInfo.WorkingDirectory ="C:\\BLA\\bin_windows"; startInfo.UseShellExecute = false; startInfo.RedirectStandardOutput = true; startInfo.CreateNoWindow = true; startInfo.FileName = "SomeProcess" Process p = Process.Start(startInfo); p

问题 I am following Michael Hartl's online tutorial and in Listing 9.42, I am having trouble comprehending the code. FactoryGirl.define do factory :user do sequence(:name) { |n| "Person #{n}" } sequence(:email) { |n| "person_#{n}@example.com"} password "foobar" password_confirmation "foobar" factory :admin do admin true end end end Then admin is created in listing 9.43 describe "as an admin user" do let(:admin) { FactoryGirl.create(:admin) } What I don't understand is how that is possible to

问题 Say I have a list of lists of lists etc... of some depth: ExampleNestedObject = numpy.ones(shape = (3,3,3,3,3)) In general I can get an element by writing: #Let: #a, b, c, d, e -> are integers print ExampleNestedObject[a][b][c][d][e] #numpy also happens to allow: print ExampleNestedObject[(a,b,c,d,e)] #python in general allows: print ExampleNestedObject[a,b,:,d,e] My question is -> how can I store the index "a,b,:,d,e" as an object? SomeSliceChoice = a,b,:,d,e print ExampleNestedObject

问题 I have this mapping: "post": { "model": "Post", "properties": { "id": { "type": "integer" }, "title": { "type": "string", "analyzer": "custom_analyzer", "boost": 5 }, "description": { "type": "string", "analyzer": "custom_analyzer", "boost": 4 }, "condition": { "type": "integer", "index": "not_analyzed" }, "categories": { "type": "string", "index": "not_analyzed" }, "seller": { "type": "nested", "properties": { "id": { "type": "integer", "index": "not_analyzed" }, "username": { "type":

问题 I am trying to parse an xml response from a web API. For a simple xml as below, I am able to work with xpathSApply and get the relevant data out very easily. Following is example.xml <?xml version="1.0" encoding="UTF-8"?> <CATALOG> <PLANT> <COMMON>Bloodroot</COMMON> <BOTANICAL>Sanguinaria canadensis</BOTANICAL> <ZONE>4</ZONE> <LIGHT>Mostly Shady</LIGHT> <PRICE>$2.44</PRICE> <AVAILABILITY>031599</AVAILABILITY> </PLANT> <PLANT> <COMMON>Columbine</COMMON> <BOTANICAL>Aquilegia canadensis<

问题 The following C++ code gives me these errors when compiled: covariant.cpp:32:22: error: invalid covariant return type for ‘virtual Q<B> C::test()’ covariant.cpp:22:22: error: overriding ‘virtual Q<A> B::test()’ I do not want to change the line virtual Q<B> test() {} to virtual Q<A> test() {} although it removes the compilation errors. Is there another way to solve this problem? template <class T> class Q { public: Q() {} virtual ~Q() {} }; class A { public: A() {} virtual ~A() {} }; class B {

问题 The second_smallest(input_list) function has to return the second smallest value from a list of nested lists. The function MUST NOT pass through the list more then once (can't flatten and then proceed), must use default built-in python functions ( no import ), must use recursion and NO LOOPS . The list passed into the function can be the form of: >>> [1,2,3] >>> [[1,2],3] >>> [[1],2,3] >>> [[],1,2,3] >>> [[1],[2],[3]] >>> [1,2,3,2,[4,5],[]] So the input_list can be of all these forms and the