language-agnostic

问题 I've been trying to figure out a way to generate all distinct size-n partitions of a multiset, but so far have come up empty handed. First let me show what I'm trying to archieve. Let's say we have an input vector of uint32_t : std::vector<uint32_t> input = {1, 1, 2, 2} An let's say we want to create all distinct 2-size partitions. There's only two of these, namely: [[1, 1], [2, 2]], [[1, 2], [1, 2]] Note that order does not matter, i.e. all of the following are duplicate, incorrect solutions

问题 I have this question: Given two sorted lists (stored in arrays) of size n, find an O(log n) algorithm that computes the nth largest element in the union of the two lists. I can see there is probably a trick here as it requires the nth largest element and the arrays are also of size n, but I can't figure out what it is. I was thinking that I could adapt counting sort, would that work? 回答1: Compare A[n/2] and B[n/2]. If equal, any of them is our result. Other stopping condition for this

问题 Say I have a list of integers, where each element is a number from 1 to 20. (That's not what I'm trying to sort.) Now, I have an array of "operations", where each operation: Removes certain (known) numbers from the list and Adds certain other (known) numbers to the list and Is unable to handle the list if it contains certain (known) numbers at the beginning of the operation - call these Prevent Edit: There can be zero or more numbers in each of Adds , Removes , and Prevent for each operation,

问题 So I need to get hours, minutes and seconds out of entries like these: 04:43:12 9.43.12 1:00 01.04 59 09 The first two is hours, minutes and seconds. Next to is minutes and seconds. Last two is just seconds. And I came up with this regexp, that works..: \A(?<hours>\d{1,2})(?::|\.)(?<minutes>\d{1,2})(?::|\.)(?<seconds>\d{1,2})\z|\A(?<minutes>\d{1,2})(?::|\.)(?<seconds>\d{1,2})\z|\A(?<seconds>\d{1,2})\z But it is ugly, and I want to refactor it down to not be 3 different expressions (mostly

问题 We have all read about or heard about the stack class, but many of us have probably never found a reason to use the LIFO object. I am curious to hear of real world solutions that used this object and why. http://msdn.microsoft.com/en-us/library/system.collections.stack.aspx I recently saw an example where a programmer used a stack to keep track of his current position while traversing a hierarchical data source. As he moved down the hierarchy, he pushed his position identifier on to the stack

问题 I've heard people say (although I can't recall who in particular) that the number of bugs per line of code is roughly constant regardless of what language is used. What is the research that backs this up? Edited to add : I don't have access to it, but apparently the authors of this paper "asked the question whether the number of bugs per lines of code (LOC) is the same for programs written in different programming languages or not." 回答1: One possible source would be Les Hatton's 1995 paper

问题 I've heard people say (although I can't recall who in particular) that the number of bugs per line of code is roughly constant regardless of what language is used. What is the research that backs this up? Edited to add : I don't have access to it, but apparently the authors of this paper "asked the question whether the number of bugs per lines of code (LOC) is the same for programs written in different programming languages or not." 回答1: One possible source would be Les Hatton's 1995 paper

问题 I have a file that contains "straight" (normal, ASCII) quotes, and I'm trying to convert them to real quotation mark glyphs (“curly” quotes, U+2018 to U+201D). Since the transformation from two different quote characters into a single one has been lossy in the first place, obviously there is no way to automatically perform this conversion; nevertheless I suspect a few heuristics will cover most cases. So the plan is a script (in Emacs) that does something like the following: for each straight

问题 I'm looking for a code duplication tool that is language agnostic. It's easy to find language specific code duplication tools (for Java, C, PHP, ...), but I'd like to run some code duplication analysis on a templates in a custom syntax. I don't care about advanced parsing of the syntax, just straight line based raw string comparison is fine. Whitespace insensitive matching would be a plus, but not required. (It's not that hard to normalize/eliminate whitespace myself.) Does anybody know a

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 6 years ago . I am a software development guy. Lately I was thinking of trying out some firmware development, as the company I work for is trying to enter that domain. I have many questions regarding firmware devlopment - like: What are the tools used - like IDE? In which language is most of