io

问题 I have a very strange problem, I'm trying to read a .txt file with C, and the data is structured like this: %s %s %d %d Since I have to read the strings all the way to \n I'm reading it like this: while(!feof(file)){ fgets(s[i].title,MAX_TITLE,file); fgets(s[i].artist,MAX_ARTIST,file); char a[10]; fgets(a,10,file); sscanf(a,"%d %d",&s[i].time.min,&s[i++].time.sec); } However, the very first integer I read in s.time.min shows a random big number. I'm using the sscanf right now since a few

问题 Let's say for instance I have this scenario C:\Users\Name\Documents\Workspace\Project\Src\Com\Name\Foo.java Public class Foo { public Foo() { Bar b = new Bar(); b.method(); } } Then lets say that class Bar is in a .JAR file that's being used as a library, is it possible to figure out where the class that called method() was from? (in this case, the Foo class) I've done a little looking around Google and can't find anything, and this code would definately simplify my library quite a bit. 回答1:

问题 Before I go into too detail, my program is written in Visual Studio 2010 using C# .Net 4.0. I wrote a program that will generate separate log files for each run. The log file is named after the time, and accurate up at millisecond (for example, 20130726103042375.log ). The program will also generate a master log file for the day if it has not already exist (for example, *20130726_Master.log*) At the end of each run, I want to append the log file to a master log file. Is there a way to check

问题 I am working on C# on Win7. I need to use Streamwriter to write to a txt file. StreamWriter outfile = new StreamWriter(MY_PATH, true); foreach(a line of strings) { // process the line outfile.Write(String.Format(WIDTH + " " + WIDTH, num1Str+"\t", num2Str+"\t")); } if all elements in line are "0" // do not write anything to the file, clear outfile buffer // WIDTH are constants. num1Str and num2Str are variables. How to clear the contents written in the stream buffer ? Flush is not a solution

问题 I'd like to read uint32_t integers from a file using the code below. ifstream only accepts a pointer to a char array. Is there another way to read uint32_t values using a code similar to the below? int readCount; uint32_t buffer[SIZE]; while ( fin.read( &buffer[0], SIZE) || (readCount = fin.gcount()) != 0 ) { // some code } 回答1: Use a cast, e.g.: if (fin.read(reinterpret_cast<char *>(buffer), sizeof buffer) && fin.gcount() == sizeof buffer) { // use buf } (Interpreting any object as an array

问题 I want to read in bash when any key is pressed , be it arrow key, number, letter, or punctuation, without pressing enter. This is the closest that I have come up with, besides that when an escaped key is pressed, it spills over into the next input. Also, escaped keys will read but not echo. #!/bin/bash read -r -n 1 -d $'\n' -p 'input> ' line echo -en "\n" echo "$line" 回答1: A bit hacky/dirty way, but should work for user interactive shells... read -n1 -s -p 'input> ' line; read -t 0.1 -n2 -s

问题 I have been experimenting with guava lately and I have not come across a way to copy all of the files from one directory to another. If anyone can point me in the right direction on how to do this that would be great. 回答1: Guava is not providing any fancy file manipulation utilities apart from the rather rudimentary functionality in Files. To copy files from one directories, please use a different library, e.g. commons.io.FileUtils.copyDirectory. 来源： https://stackoverflow.com/questions

问题 I have been experimenting with guava lately and I have not come across a way to copy all of the files from one directory to another. If anyone can point me in the right direction on how to do this that would be great. 回答1: Guava is not providing any fancy file manipulation utilities apart from the rather rudimentary functionality in Files. To copy files from one directories, please use a different library, e.g. commons.io.FileUtils.copyDirectory. 来源： https://stackoverflow.com/questions

问题 I have a fitted model that I'd like to apply to score a new dataset stored as a CSV. Unfortunately, the new data set is kind of large, and the predict procedure runs out of memory on it if I do it all at once. So, I'd like to convert the procedure that worked fine for small sets below, into a batch mode that processes 500 lines at a time, then outputs a file for each scored 500. I understand from this answer (What is a good way to read line-by-line in R?) that I can use readLines for this. So

问题 Suppose that I have the following code: #include <chrono> #include <fstream> #include <thread> int main() { std::ofstream f("test.log"); int i = 0; while (true) { f << i++; f.flush(); std::this_thread::sleep_for(std::chrono::milliseconds(100)); } } (note that I have a flush call after each write operation) I noticed that this application doesn't update "last modified time" and "size" attributes of the "test.log" file unless I do a right-click on this file or open it. I guess that this is due