在python中安装包出现Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) pip install keras -i http://pypi.douban.com/simple --trusted-host pypi.douban.com eg pip3 install pomodorotimer -i http://pypi.douban.com/simple --trusted-hos…

原文转自 http://stackoverflow.com/questions/21085261/apprtcdemo-with-local-server-works-between-browsers-but-not-android-native-to-br I am developing a chat application and done with it. Now I want to implement video chat also. After research a lot I dec…

原文: http://www.vertabelo.com/blog/technical-articles/orms-under-the-hood It often happens that if something is loved, it is also hated with the same power. The idea of object relational mapping fits into this concept perfectly. You will definitely co…

本文为 Dennis Gao 原创技术文章,发表于博客园博客,未经作者本人允许禁止任何形式的转载. 前言 炎炎夏日,朗朗乾坤,30℃ 的北京,你还在 Coding 吗? 整个 7 月都在忙项目,还加了几天班,终于在这周一 29 号,成功的 Release 了产品.方能放下心来,潜心地研究一些技术细节,希望能形成一篇 Blog,搭上 7 月最后一天的末班车. 导航 背景 问题根源 复现问题 真相 解决办法 环境干扰 修复细节 社区讨论 WinDbg文档 完整代码 背景 本篇文章起源于项目中的一个…

symbol file path: srv*d:\symbolslocal*http://msdl.microsoft.com/download/symbols 即使设置是对的,但我用.reload,却仍无法下载符号 Microsoft (R) Windows Debugger Version 10.0.14321.1024 AMD64 Copyright (c) Microsoft Corporation. All rights reserved. Opened \\.\pipe\kd_Win…

我后来加大了client的连接/断开的次数(500,1000),Server端的连接被释放了. 这说明: 1. 此代码是 可以正常工作的. 2.TcpListener/TcpListener的async的使用上,编译器生成的代码并没有在socket关闭的时候显式调用Disopose(),Dispose()在GC的时候被调用的,个人猜测可能是Pooling,也可能是生成的代码不够漂亮. -------------------------------------------- 最近想写个socket…

New Features, Feature Enhancements and Behavior ChangesSubforms – Behavior Change for Unsupported Task ModeStarting with this version, if an Online task that is running in a Subform control cannot be executed, the task and the host task will remain o…

RAC: Frequently Asked Questions [ID 220970.1]   修改时间 13-JAN-2011     类型 FAQ     状态 PUBLISHED   Applies to: Oracle Server - Enterprise Edition - Version: 9.2.0.1 to 11.2.0.1 - Release: 9.2 to 11.2 Purpose Frequently Asked Questions for Real Applicatio…

Precisely this article is about Windows 8.1, the title uses Windows 8 due to the fact that Windows 8.1 is mainly an enhanced version of Windows 8 and therefore categorised in the Windows 8 family. Sections marked (*) are proper for beginners, (**) fo…

What is load testing? - Load testing is to test that if the application works fine with the loads that result from large number of simultaneous users, transactions and to determine weather it can handle peak usage periods. What is Performance testing…