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C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
...从缓冲区中取出消息
MessageBuffer.h
//MessageBuffer.h
#ifndef _MESSAGE_BUF_INCLUDE_
#define _MESSAGE_BUF_INCLUDE_
#include <pthread.h>
#define MESSAGE_COUNT 16
#define MESSAGE_LENGTH 2048
class MessageBuffer{
private:
pthread_mutex_t mutex;//访问缓冲的互斥量
pthread_...
Get Unix Epoch Time in Swift
...alSince1970)
let preciseMilliseconds = Int(Date().timeIntervalSince1970 * 1_000)
let preciseMicroseconds = Int(Date().timeIntervalSince1970 * 1_000_000) // most likely precise
Unfortunately, however, in the year 2038, 32-bit numbers won't be usable for the Unix timestamp and they'll have to be 64-...
What's a good rate limiting algorithm?
...sages
per = 8.0; // unit: seconds
allowance = rate; // unit: messages
last_check = now(); // floating-point, e.g. usec accuracy. Unit: seconds
when (message_received):
current = now();
time_passed = current - last_check;
last_check = current;
allowance += time_passed * (rate / per);
if (...
Saving interactive Matplotlib figures
...some fancy figure editor like Adobe Illustrator (or Inkscape).
EDIT post Fall 2012: As others pointed out below (though mentioning here as this is the accepted answer), Matplotlib since version 1.2 allowed you to pickle figures. As the release notes state, it is an experimental feature and does no...
Create directories using make file
...ssuming a Unix-like environment.
MKDIR_P = mkdir -p
.PHONY: directories
all: directories program
directories: ${OUT_DIR}
${OUT_DIR}:
${MKDIR_P} ${OUT_DIR}
This would have to be run in the top-level directory - or the definition of ${OUT_DIR} would have to be correct relative to where ...
postgresql - replace all instances of a string within text field
In postgresql, how do I replace all instances of a string within a database column?
4 Answers
...
How to display loading message when an iFrame is loading?
...
It depends on the user's needs. If he don't need all images to be loaded before he hide the loading message then he won't need the on load callback.
– Minko Gechev
Jul 25 '12 at 12:55
...
NodeJS: How to get the server's port?
...eServer();
// Configuration
app.configure(function(){
app.set('views', __dirname + '/views');
app.use(express.bodyDecoder());
app.use(express.methodOverride());
app.use(express.compiler({ src: __dirname + '/public', enable: ['less'] }));
app.use(app.router);
app.use(express.staticProvi...
Get file name from URL
...
If you let String url = new URL(original_url).getPath() and add a special case for filenames that don't contain a . then this works fine.
– Jason C
May 6 '15 at 20:28
...
What do I have to do to get Core Data to automatically migrate models?
...AndKeys:
[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
[NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];
NSError *error;
_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: [self managedObjectMod...