Hello, I'm learning C++, then i was searching for some codes for learn something in the area that i love: File I/O, but i want to know how i can tweak my code for the user type the file that he wants to see, like in wget, but with my program like this: C:\> FileSize test.txt The code of my program is here: // obtaining file size #in...
Hello, I'm learning C++ and i'm getting some troubles when i'm trying to use a String in a ifstream method, like this: string filename; cout << "Enter the name of the file: "; cin >> filename; ifstream file ( filename ); Here is the full code: // obtaining file size #include <iostream> #include <fstream> using namespace std; int...
I'm integrating my Ruby on Rails app with a usps shipping system. Once you make a postage request, you pay for that postage and it's nonrefundable. Postage requests will return you an xml response including a base64 string, which is the shipping label. I'm able to render the shipping label in a view, however to make it foolproof, I w...
I'm trying to create a program that reads a .docx file and posts it content to a blog/forum for personal use. I finally have figured out how to use libcurl to do (what I figured) was the harder part of the program. Now I just have to read the .docx file, but have come under a snag. I can't seem to find any documentation on how to do t...
Hi! I'm using the algorithm described here to fit Gaussian bell curves to my data. If I generate my data array with: x=linspace(1.,100.,100) data= 17*exp(-((x-10)/3)**2) everything works fine. But if I read the data from a text file using file = open("d:\\test7.txt") arr=[] data=[] def column(matrix,i): return [row[i] for ro...
I'm outputting files in C# and want to handle files being saved with the same name by adding brackets and a number: FooBar.xml FooBar(1).xml FooBar(2).xml ... FooBar(N).xml Is there a simple way to do that in .NET? And is there a special name for the (#) construct? ...
file_read = open("/var/www/rajaneesh/file/_config.php", "r") contents = file_read.read() print contents file_read.close() The output is empty, but in that file all contents are there. Please help me how to do read and replace a string in __conifg.php. ...
I'm trying to read a file into a buffer in blocks of size BLOCK_SIZE (currently equal to 1000 unsigned chars). My code first finds the number of blocks it will have to read in order to read the entire file (usually 2-4), then iterates through a for loop reading the file (ignore the "+17+filenamesize" stuff, that is all needed for later i...
I'm trying to iterator over some directories containing approximately 3000 images. I load the image. If the image is loaded I release it. That is the smallest program that I can write to reproduce the error. After loading and releasing 124 images the program stops loading images. I think this a memory issue but I don't understand what...
A client is insisting that we store some vital and complex configuration data as php arrays while I want it to be stored in the database. He brought up the issue of efficiency/optimization, saying that file i/o will be much faster than database queries. I'm pretty sure I heard somewhere that file includes are actually slow in PHP. Any s...
Hello: I have a utility command that writes out a list of the 3 or so files it created, ie: Console.WriteLine("\t{0} \tUpdated @ {1}", file, lastWriteTime); The main reason I do this is so I can find the files easily after the routine runs (the location may vary). Ideally, I'd be able to hotlink and open the file using ctrl + click,...
I know all the discussions about why one should not read/write files from kernel, instead how to use /proc or netlink to do that. I want to read/write anyway. I have also read http://www.linuxjournal.com/article/8110 However, problem is 2.6.30 does not export sys_read(). Rather its wrapped in SYSCALL_DEFINE3. So if I use that in my mod...
1) How can I use FindFirstChangeNotification / FindNextChangeNotification + ReadDirectoryChanges to detect certain files being created or removed? 2) Is the FILE_NOTIFY_CHANGE_LAST_WRITE a reliable indicator of a file change? Application: I have an explicit list of files that may be located in different folders. Display contents depe...
I have a small C# ASP.NET web application which generates several PNG image files from dynamically created .NET Chart controls. These are then used to: Create a lightbox effect Create a PDF Create a Zip file The application gets little usage and the data is updated often, so I'm re-creating everything on each load. The problem is, ...
What is the fastest way to add an attribute to the root element of a massive XML file? These files are too large to be read into memory and I'd like to avoid as much of an I/O penalty as possible. ...
I am trying to write to the iPhone app's cache folder with images downloaded from a server. My plan is to save the images in "site.com/path/to/image.jpg", since mirroring the server folder structure like that makes duplicate names impossible, and it just seems the right way to do it. Unfortunately, it seems I have to create the folders m...
I have some directories containing test data, typically over 200,000 small (~4k) files per directory. I am using the following C# code to get the number of files in a directory: int fileCount = System.IO.Directory.GetFiles(@"C:\SomeDirectory").Length; This is very, very slow however - are there any alternatives that I can use? Edit ...
I have text files with a lot of uniform rows that I'd like to load into a mysql database, but the files are not completely uniform. There are several rows at the beginning for some miscellaneous information, and there are timestamps about every 6 lines. "LOAD DATA INFILE" doesn't seem like the answer here because of my file format. It d...
I want to use a FileStream and seek from the beginning of the file while moving forward in the file .01% of the file size at a time. So I want to seek to a position in the file, read the entire line, if it matches my criteria I am done. If not, I seek ahead another .01. C# is OK but VB.NET preferred. I used to do it something like thi...
I have created an application that does the following: Make some calculations, write calculated data to a file - repeat for 500,000 times (over all, write 500,000 files one after the other) - repeat 2 more times (over all, 1.5 mil files were written). Read data from a file, make some intense calculations with the data from the file - r...