Libcurl多线程crash问题(cento)
cento :http://blog.csdn.net/delphiwcdj/article/details/182844291 问题背景后台系统有一个单线程的http接口,为了提高并发处理能力,开启多个线程并发在跑,修改后接口的响应确实得到提高,但是server每3分钟出现一次crash。原因是系...
docker 数据管理3
实际应用: 第一个容器使用: docker run -itd -v /data/:/data1 centos bash // -v 用来指定挂载目录, 后面的容器使用之前的容器数据卷 docker:/root# mkdir /data docker:/root# 1.创建第一个容器: docke...
TOYS (基础计算几何:叉积应用)
【题目来源】:https://vjudge.net/problem/POJ-2318 【题意】 给出一个矩形的柜子,这个柜子有n个隔板,小孩手里有m个布偶,将娃娃都扔进去,问,被隔板分离出来的每个小空间里有几个娃娃? 给出n,m,和矩阵柜子的左上角坐标,与右下角的坐标,下面有n+m行,前n行给出隔板...
[JZOJ3754]【NOI2014】魔法森林
题目大意 给定N个点M条边的无向图,每条边有两个权值a与b。求一条1到n的路径使得路径经过边的最大a与最大b的和最小。无法到达输出-1。 n<=50000,m<=100000。ai,bi<=50000 分析 看到ai这么小,我们考虑枚举ai然后算最小b。 那么从小到大...
将参数传递给Perl子例程时,是否会影响数据复制性能?
I have been working on several Perl scripts that process large fixed-width data files, extracting small substrings out of each data record. I had imag...
如何使用UIBezierPath填充自定义形状?
I want to create a custom shape into a UIView by drawing it myself using a UIBezierPath object and render it in drawRect:. So far I managed to create ...
我需要处理任务吗?
I am having fun working with System.Threading.Tasks. Many of the code samples I see, however, look something like so: 我很高兴使用System.Threading.Tasks。但是,...
通过AffineTransform旋转使保存的图像为空
Ok my problem is simple, after performing AffineTransform, my image is not saving properly (however it is drawn on JPanel properly!). It is really str...
日期时间戳在R中未正确匹配/合并
I have two data frames: 我有两个数据框: locA: Date Time Temperature Voltage Longitude Latitude Deployment DateTime2014-08-08 14:18:25 20.9 ...
如何使用socket.io-stream上传文件?
This is my source code. 这是我的源代码。 <server.js>var app = require('./app.js');var socketIO = require('socket.io');var ss = require('socket.io-stream...
GO slim
1. GO slim简介GO slims are cut-down versions of the GO ontologies containing a subset of the terms in the whole GO. They give a broad overview of the on...
如何在rails中的render动作中传递参数
def create @emppede = Emppede.new(params[:emppede]) respond_to do |format| if @emppede.save format.html { redirect_to :action => ...
如何从左到右依次漂浮两张桌子?
If I had two tables? 如果我有两张桌子? <table class="one"> and... <table class="two"> And the CSS looks like: CSS看起来像: table.one { position: re...
Perl Regex:用可选的多行匹配文本
I'm trying to extract object files from Linux Make files. Here are some examples: 我正在尝试从Linux Make文件中提取对象文件。下面是一些例子: Intel E1000E: 针对英特尔E1000E: e1000e...
“void是变量paintSquare的无效类型”错误
I'm making a Tetris clone for my AP Comp Sci class properly titled 'Titris' and while going through whatever errors there were I got this one. it came...
为什么在创建数据库表时需要这些特定的数据类型?
Take the following create table statement: 采取以下create table语句: create table fruit{ count int, name varchar(32), size float} Instead of those specif...
如何使用Perl列出目录中的所有文件? [重复]
This question already has an answer here: 这个问题在这里已有答案: How do I read in the contents of a directory in Perl? 8 answers 如何读入Perl中目录的内容? 8个答案 ...
文件读写操作的函数
笔记: /*#include <unistd.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>int open(const char *pathname, int fl...
将JS Array中的键值对减少为object
I have one object that I had to take apart into two arrays to handle properly. It looked like this: 我有一个对象,我必须分成两个数组才能正确处理。它看起来像这样: { city:"stuttgart...
linux中文件/文件夹的权限
linux是一个多用户的操作系统,每个用户都有自己的文件,有些文件对用于来讲是保密的,不希望别人看到,有些文件尽管可以被别人看到,但不允许别人去修改,还有些文件是允许所有人自由修改的,所以就有了文件的权限。如果用户比较多的话,有些文件对一些人是可读可写的,对令一些人却是隐藏的,这种情况下设置用户...