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问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 11 months ago . Improve this question I know using recursions way but it works just for loops which beginning and ending statements are same like code below for (int i=1 ; i<5;i++){ for (int j=0; j<5;j++){ for (int m= 0;m<5;m++) { // N time } } } But my problem is different. I do not know N level and beginning

问题 I have a little project written in Kotlin. When I run clean compile assembly:single install , I get following error message: Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-5:single (default-cli) on project alma-econsim: Error reading assemblies: No assembly descriptors found. -> [Help 1] My jar-with-dependencies.xml is located in src/main/assembly and referenced in pom.xml like this: <plugin> <artifactId>maven-assembly-plugin</artifactId> <version>2.2-beta-5<

问题 I have a little project written in Kotlin. When I run clean compile assembly:single install , I get following error message: Failed to execute goal org.apache.maven.plugins:maven-assembly-plugin:2.2-beta-5:single (default-cli) on project alma-econsim: Error reading assemblies: No assembly descriptors found. -> [Help 1] My jar-with-dependencies.xml is located in src/main/assembly and referenced in pom.xml like this: <plugin> <artifactId>maven-assembly-plugin</artifactId> <version>2.2-beta-5<

问题 In the following code I am trying to edit the contents of an unordered_map: class A { public: A() {std::cout << "Constructor called, address=" << this << std::endl;val=1;} int val; }; void main(void) { std::unordered_map<int,A> um; for (int i=0;i<3;i++) std::cout << "um[" << i << "]=" << &(um[i]) << ", val=" << um[i].val << std::endl; for (auto it : um) std::cout << "&it.second=" << &(it.second) << ", val=" << it.second.val << std::endl; int index = 1; for (auto um_it : um) um_it.second.val =

问题 I'm really struggling with this & would appreciate some help please. I'm learning Android Kotlin & building an app that displays a list of walking routes (downloaded from the cloud) in a RecyclerView &, when a route is selected I want to display all details of the route - a simple Master-Detail app. Since, I'm learning I also want to try and use best practice. I have most of it working fine using a Room database & a Repository. The database is correctly populated and the RecyclerView displays

问题 I have a fixed laser beam SCNNode and a detecting sphere SCNNode attached in front of a camera. How to detect penetration without physical interaction? I have not found any clue.. EDIT: - as suggested below by maxxFrazer I implemented physical interaction and I'm able to register collision IF my laser beam is .static and detector moved by camera set .kinematic. 回答1: If you need to detect a penetration without physical interaction use trackedRaycast instance method working in iOS 13+: func

问题 I have a list of Student Objects as below. Student1 DOB : 12/02/2010 Student2 DOB : 12/03/2010 Student1 DOB : 12/04/2010 Student4 DOB : Student2 DOB : Student3 DOB : 12/01/2010 Student{ String name; Date dob; } I want to group the Students based on the DOB as below. All Students should be grouped based on the student name. Students must be in descending order of dob. Same Students grouped together should be in descending order of dob. Remaining Student objects must be in same order as it is

问题 I am manually initializing a state in the 2d frequency domain by setting the real components of certain modes in a 16x16 data set. I then perform a 2d IDFT to acquire the real domain data. This all works as expected. I then perform a DFT on the real domain data to get back (what should be) identical frequency modes to those that I manually initialized. However, they come back with their amplitudes halfed, and their vertical frequencies "mirrored". To illustrate: Input modes: k[1, 0]: 32 + 0i

问题 I am having trouble with some variable types in my code. The error that I get now is: TypeError: can't convert type 'str' to numerator/denominator The code line in question is the following: valor_anual[data[0]['Dados'][json_date][0]['geodsg']][year_code] = statistics.mean(valor_mensal_aux) Here is a snippet of my code to give you guys context: valor_anual = [0][0] for city_code in city_codes: for year_code in year_codes: valor_mensal_aux = [] for month_code in month_codes: url_imob = Request

问题 I have a list of Student Objects as below. Student1 DOB : 12/02/2010 Student2 DOB : 12/03/2010 Student1 DOB : 12/04/2010 Student4 DOB : Student2 DOB : Student3 DOB : 12/01/2010 Student{ String name; Date dob; } I want to group the Students based on the DOB as below. All Students should be grouped based on the student name. Students must be in descending order of dob. Same Students grouped together should be in descending order of dob. Remaining Student objects must be in same order as it is