buffer

问题 I am trying to analyze spatial density of gas station points using R. I need to create a buffer (circle) around the gas stations and count the number of gas stations within the buffer. I'll then need to play around with buffer distances to see what's a reasonable buffer to see something interesting. These are the files I am working with: https://dl.dropboxusercontent.com/u/45095175/sbc_gas.shp; https://dl.dropboxusercontent.com/u/45095175/sbc_gas.shx; https://dl.dropboxusercontent.com/u

问题 I'm currently trying to do some tests with the buffer overflow vulnerability. Here is the vulnerable code void win() { printf("code flow successfully changed\n"); } int main(int argc, char **argv) { volatile int (*fp)(); char buffer[64]; fp = 0; gets(buffer); if(fp) { printf("calling function pointer, jumping to 0x%08x\n", fp); fp(); } } The exploit is quite sample and very basic: all what I need here is to overflow the buffer and override the fp value to make it hold the address of win()

问题 I don't want to use any Java code, I just want to use <jsp:include> or <c:import> or something to that effect. So that I can use <c:set var="myPage" value="bufferedPageOutput" /> to output the generated HTML later. How can I do this with JSP/JSTL/Struts? 回答1: The <c:import> tag can take an optional var attribute, which stores the imported content as a variable. <c:import var="myPage" url="uri/to/import"/> Very useful 来源： https://stackoverflow.com/questions/2563735/how-can-you-store-jsp

问题 I don't know where is the problem here, i'm trying to output all the character from file to the screen, but somehow it prints only the last one. For example if my test.txt file has a line abc in it, the output shows us only c . How should i use lodsb properly in this situation? Don't mind some unnecessary lines in data section, i just pasted not the all code. Updated code: .model small .stack 100h .data filename db 'test.txt',0 filename1 db 'temp.txt',0 error_open db 'impossible to open this

问题 I'm trying to achieve communication between Node.js and Python. For this task, I'm using Node.js's python-shell NPM module to run a Python script and read the print output. I want to do some OpenCV image processing stuff on Python, send the image to Node.js and serve it on an application. Here is the Node.js part: let {PythonShell} = require('python-shell') let options = { mode: 'text', pythonOptions: ['-u'], // get print results in real-time args: ['value1', 'value2', 'value3'] };

问题 My application details: Running on : Macbook pro with 4GB RAM, ATI Radeon X1600 with 128MB VRAM, Opengl version: 2.1 ATI-7.0.52 Using vertical sync (via CVDisplay) : YES Programming Language: Lisp (Lispworks) with FFI to Opengl Pixel Format information ns-open-gl-pfa-depth-size 32 ns-open-gl-pfa-sample-buffers 1 ns-open-gl-pfa-samples 6 ns-open-gl-pfa-accelerated 1 ns-open-gl-pfa-no-recovery 1 ns-open-gl-pfa-backing-store 0 ns-open-gl-pfa-virtual-screen-count 1 [1 = YES, 0 = NO] for boolean

问题 First of all, I've never worked with C before (mostly Java which is the reason you'll find me write some naive C code). I am writing a simple command interpreter in C. I have something like this: //Initialization code if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1) { perror("Select dead"); exit(EXIT_FAILURE); } .... .... //Loop through connections to see who has the data ready //If the data is ready if ((nbytes = recv(i, buf, sizeof(buf), 0)) > 0) { //Do something with the message in

问题 I'm trying to do something very simple: I have two buffers in Vim, one with source code (B1), another one with a text file a.txt (B2). The source code in B1 is run with a custom shortcut in Vim, filling a.txt with text. I want Vim to automatically scroll B2 every time it updates, even if my cursor is in B1. So, I just want that the buffer B2 to behave the way tail -f does. Doing this with ConqueTerm is not an option, since buffer B2 can be a preview buffer from other plugin. 回答1: In general,

问题 I am trying to write an int array to a fstream, but I am getting an exception when I call fstream.write . Can I use fstream to write an int array to a file? int main(int argc, char * argv[]) { fstream amostra("D:\\Amostra.txt", ios::out | ios::binary); const int total_elements_block = 1024; const int buffer_size = total_elements_block; const int total_buffer = 10; int * buffer = new int [buffer_size]; //for (int j=0; j<total_buffer; j++){ for (int i =0; i<total_elements_block; i++){ buffer[i]

问题 I'm trying to write a function that pings a few hundred addresses and returns their values (milliseconds). So far I've achieved the initial idea which is to ping and get the result but the problem arises when using the same code for hundreds of addresses, the PHP page stalls until it either times out or reaches the last ping command. I would be glad if I could get some suggestions to output the results progressively, here is my current code: <?php // "for" loop added according to suggestion