language-agnostic

问题 Here we have a box that is 4 * 7 and it can be filled with rectangles that are either 1 * 2 or 2 * 1. This depiction is from the book Competitive Programmer's Handbook . To solve this problem most efficiently, the book mentions using the parts that can be in a particular row: Since there are 4 things in this set, the maximum unique rows we can have is 4^m, where m is the number of columns. From each constructed row, we construct the next row such that it is valid. Valid means we cannot have

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 5 years ago . I was wandering if there's a way in which the OS doesn't need to cycle ad infinitum waiting for the input from keyboard (or other input device) and if there are any OS using that. I can't believe that we do need to waste cycling just to wait for input, why can't the input do something once is pressed instead of

问题 I have seen many different implementations of the same basic CRC-32 algorithm shown below: int remain; int sbox[SIZESBOX]; int dividend; int bit; for(dividend = 0; dividend < SIZESBOX; dividend++) { remain = dividend << 24; for(bit = 0; bit < 8; bit++) { if(remain & TOPBIT) { remain = (remain << 1) ^ POLYNOMIAL; } else { remain = (remain << 1); } } sbox[dividend] = remain; } Some of them XOR the dividend before going into the sbox. Others XOR before going into the bit loop, and others use

问题 Is there a way to check to see if an Microsoft Office process (i.e. Word, Excel) has hung when using Office Automation? Additionally, if the process is hung, is there a way to terminate it? 回答1: Let me start off saying that I don't recommend doing this in a service on a server, but I'll do my best to answer the questions. Running as a service makes it difficult to clean up. For example with what you have running as a service survive killing a hung word or excel. You may be in a position to

问题 Looking at Tom Christiansen's talk 🔫 Unicode Support Shootout 👍 The Good, the Bad, & the (mostly) Ugly 👎 working with text seems to be so incredibly hard, that there is no programming language (except Perl 6) which gets it even remotely correct. What are the key design decisions to make to have a chance to implement Unicode support correctly on a clean table (i. e. no backward-compatibility requirements). What about default file encodings, which transfer format and normalization format to use

问题 I have question regarding the use of function parameters. In the past I have always written my code such that all information needed by a function is passed in as a parameter. I.e. global parameters are not used. However through looking over other peoples code, functions without parameters seem to be the norm. I should note that these are for private functions of a class and that the values that would have been passed in as paramaters are in fact private member variables for that class. This

问题 I'm trying to create my own implementation of a puzzle game. To create my game board, I need to traverse each square in my array once and only once. The traversal needs to be linked to an adjacent neighbor (horizontal, vertical or diagonal). I'm using an array structure of the form: board[n,m] = byte Each bit of the byte represents a direction 0..7 and exactly 2 bits are always set Directions are numbered clockwise 0 1 2 7 . 3 6 5 4 Board[0,0] must have some combination of bits 3,4,5 set My

问题 I'm trying to create my own implementation of a puzzle game. To create my game board, I need to traverse each square in my array once and only once. The traversal needs to be linked to an adjacent neighbor (horizontal, vertical or diagonal). I'm using an array structure of the form: board[n,m] = byte Each bit of the byte represents a direction 0..7 and exactly 2 bits are always set Directions are numbered clockwise 0 1 2 7 . 3 6 5 4 Board[0,0] must have some combination of bits 3,4,5 set My

问题 So my understanding of currying (based on SO questions) is that it lets you partially set parameters of a function and return a "truncated" function as a result. If you have a big hairy function takes 10 parameters and looks like function (location, type, gender, jumpShot%, SSN, vegetarian, salary) { //weird stuff } and you want a "subset" function that will let you deal with presets for all but the jumpShot% , shouldn't you just break out a class that inherits from the original function? I

问题 I put together a really nice mass mailer, but occasionally mails end up in junkmail on various different mail providers for various reasons. Does anyone know if there is a write up anywhere on best practices to send mass mailers? 回答1: MailChimp have a good document which covers key points (IP ranges, rate limiting, SPF/DKIM, bounce handling, feedback loops). As an aside, it's unusual to see something so comprehensive from a company whose business is based around doing this kind of stuff for