language-agnostic

问题 As part of a recent job application I was asked to code a solution to this problem. Given, n = number of people standing in a circle. k = number of people to count over each time Each person is given a unique (incrementing) id. Starting with the first person (the lowest id), they begin counting from 1 to k. The person at k is then removed and the circle closes up. The next remaining person (following the eliminated person) resumes counting at 1. This process repeats until only one person is

问题 I am looking for things like reordering of code that could even break the code in the case of a multiple processor. 回答1: Wikipedia has a fairly comprehensive list of optimization techniques here. 回答2: The most important one would be memory access reordering. Absent memory fences or serializing instructions, the processor is free to reorder memory accesses. Some processor architectures have restrictions on how much they can reorder; Alpha is known for being the weakest (i.e., the one which can

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . While trying to answer What is the difference between a composite data type and a data structure? I realized that while I have a clear idea of what a data type is , and how it is not the same thing as a data structure , I cannot put the difference into words. If you were teaching an intro CS course, how would

问题 I am having trouble fully understanding the K-Means++ algorithm. I am interested exactly how the first k centroids are picked, namely the initialization as the rest is like in the original K-Means algorithm. Is the probability function used based on distance or Gaussian? In the same time the most long distant point (From the other centroids) is picked for a new centroid. I will appreciate a step by step explanation and an example. The one in Wikipedia is not clear enough. Also a very well

问题 I am having trouble fully understanding the K-Means++ algorithm. I am interested exactly how the first k centroids are picked, namely the initialization as the rest is like in the original K-Means algorithm. Is the probability function used based on distance or Gaussian? In the same time the most long distant point (From the other centroids) is picked for a new centroid. I will appreciate a step by step explanation and an example. The one in Wikipedia is not clear enough. Also a very well

问题 What would be the regular expressions to extract the name and email from strings like these? johndoe@example.com John <johndoe@example.com> John Doe <johndoe@example.com> "John Doe" <johndoe@example.com> It can be assumed that the email is valid. The name will be separated by the email by a single space, and might be quoted. The expected results are: johndoe@example.com Name: nil Email: johndoe@example.com John <johndoe@example.com> Name: John Email: johndoe@example.com John Doe <johndoe

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . What are some clever uses for infinite generators? I've seen lots of seemingly trivial examples like "list all even numbers" , but I assume there must be others that have more applicability to real-world scenarios. Concrete examples (in any language that support generators)

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 4 years ago . What are some clever uses for infinite generators? I've seen lots of seemingly trivial examples like "list all even numbers" , but I assume there must be others that have more applicability to real-world scenarios. Concrete examples (in any language that support generators)

问题 I am looking after a level editor easy to use and configurable, so I can use for my own application/engine. Is there something like that? 回答1: Check out Nitro Level Editor - it's XML based and fit for virtually any 2D game or application. http://code.google.com/p/nle/ 来源： https://stackoverflow.com/questions/3530533/configurable-level-editor

问题 I am looking after a level editor easy to use and configurable, so I can use for my own application/engine. Is there something like that? 回答1: Check out Nitro Level Editor - it's XML based and fit for virtually any 2D game or application. http://code.google.com/p/nle/ 来源： https://stackoverflow.com/questions/3530533/configurable-level-editor