language-agnostic

问题 How to convert from chinese characters to hanyu pinyin? E.g. 你 --> Nǐ 马 --> Mǎ More Info: Either accents or numerical forms of hanyu pinyin are acceptable, the numerical form being my preference. A Java library is preferred, however, a library in another language that can be put in a wrapper is also OK. I would like anyone who has personally used such a library before to recommend or comment on it, in terms of its quality/ reliabilitty. 回答1: The problem of converting hanzi to pinyin is a

问题 I have a system which is receiving log files from different places through http (>10k producers, 10 logs per day, ~100 lines of text each). I would like to store them to be able to compute misc. statistics over them nightly , export them (ordered by date of arrival or first line content) ... My question is : what's the best way to store them ? Flat text files (with proper locking), one file per uploaded file, one directory per day/producer Flat text files, one (big) file per day for all

问题 If I have a series of points as longitude and latitude, how would I calculate the center of all of those points? 回答1: Geomidpoint covers 3 different methods for calculating this. 回答2: Several people have answered to take the mean of the latitudes and longitudes. This is sort of the right idea, but means are more complicated on the sphere. The latitude/longitude representation is essentially artificial and has discontinuities (at the poles, and opposite the prime meridian if you aren't careful

问题 This may sound like an odd question, but where can I find a random number generator that works in C or C++ that is not very good? Context: I'm creating some tree graph plotting software and testing it by using multi-digit random numbers (so each digit becomes a node in the tree). The random number generator I've been using - which is the one that comes with the GNU C++ compiler - gives me a nice spread of values. That's good, but I want to see how the table looks when the numbers clump

问题 I am working on a building a discrete event simulator. Wikipedia mentioned that there are several general purpose priority queues that are good for use in DES's. Specifically, it mentions that a Calendar Queue is a good structure. I found one pdf (from 1988) that mentions Calendar Queues, but for the most part I can't find anything else out about them. Would someone mind explaining what Calendar Queue's are, how they're used, and where I might find a sample implementation? 回答1: A Google

问题 I am working on a building a discrete event simulator. Wikipedia mentioned that there are several general purpose priority queues that are good for use in DES's. Specifically, it mentions that a Calendar Queue is a good structure. I found one pdf (from 1988) that mentions Calendar Queues, but for the most part I can't find anything else out about them. Would someone mind explaining what Calendar Queue's are, how they're used, and where I might find a sample implementation? 回答1: A Google

问题 I'm writing a library that has several public classes and methods, as well as several private or internal classes and methods that the library itself uses. In the public methods I have a null check and a throw like this: public int DoSomething(int number) { if (number == null) { throw new ArgumentNullException(nameof(number)); } } But then this got me thinking, to what level should I be adding parameter null checks to methods? Do I also start adding them to private methods? Should I only do

问题 I'm writing a library that has several public classes and methods, as well as several private or internal classes and methods that the library itself uses. In the public methods I have a null check and a throw like this: public int DoSomething(int number) { if (number == null) { throw new ArgumentNullException(nameof(number)); } } But then this got me thinking, to what level should I be adding parameter null checks to methods? Do I also start adding them to private methods? Should I only do

问题 I'm writing a library that has several public classes and methods, as well as several private or internal classes and methods that the library itself uses. In the public methods I have a null check and a throw like this: public int DoSomething(int number) { if (number == null) { throw new ArgumentNullException(nameof(number)); } } But then this got me thinking, to what level should I be adding parameter null checks to methods? Do I also start adding them to private methods? Should I only do

问题 I'm just curious about Domain-Specific Languages. I have seen them several times in articles, and it seems that they can be used outside assurance or bank data definition problems. So I come to SO to have some concrete input. Did you ever use a DSL? Write one. If yes, what's it feel like? Do you think one of your projects could be better (more productive, more maintainable, ...) with a DSL? Edit : I'm sorry to put this after, but i was meanning a specific DSL that you wrote yourself. It's