If you talking to a friend or talking to a family member ,you can say:what's the metter or What's going on? But when you dealing with business situations you need to use more business professional[专业的] language. Let's look at that business language.…

Introduction Me and my wife had some interesting conversations on Object Oriented Design principles. After publishing the conversation on CodeProject, I got some good responses from the community and that really inspired me. So, I am happy to share o…

原文地址 I’m a minimalist, and I don’t like to complicate software too early and unnecessarily. And adding components to a software system is one of the things that adds a significant amount of complexity. So let’s talk about message queues. Message Queu…

Symptom You have questions related to the SAP HANA memory. You experience a high memory utilization or out of memory dumps. Environment SAP HANA Cause 1. Which indications exist for SAP HANA memory problems?2. How can I collect information about the…

While developing your application, you should check that user interactions are buttery smooth, running at a consistent 60 frames per second. If something goes wrong, and a frame gets dropped, the first step in fixing the problem is understanding what…

Analyzing Crash Reports After you distribute your app for testing by using TestFlight or after you make it available on the store, routinely download and analyze crash reports. When an app crashes, the system creates a crash log that describes the co…

Analyzing UI Performance with Systrace In this document Overview 简介 Generating a Trace  生成Systrace文件(html) Tracing on Android 4.3 and higher   4.3以上 Tracing on Android 4.2 and lower    4.2以下 graphical user interface               用工具生成Systrace 文件 Ana…

Introduction When an application crashes, a crash report is created and stored on the device. Crash reports describe the conditions under which the application terminated, in most cases including a complete backtrace for each executing thread, and ar…

本文是Unity官方教程,性能优化系列的第二篇<Diagnosing performance problems using the Profiler window>的简单翻译. 相关文章: Unity性能优化(1)-官方教程The Profiler window翻译 Unity性能优化(2)-官方教程Diagnosing performance problems using the Profiler window翻译 Unity性能优化(3)-官方教程Optimizing garbage co…

      早晨宁波那边的IT人员打电话告知数据库无法访问了.其实我在早晨也发现Ignite监控下的宁波的数据库服务器出现了异常,但是当时正在检查查看其它服务器发过来的各类邮件,还没等到我去确认具体情况,就收到了电话.我首先检查网络是否畅通,结果发现网络没有问题,然后远程登录到该服务器,查看了一下数据库的服务发现其运行正常,但是在本机使用MSSMS管理工具亦无法连接数据库,当下有两种方案:方案一:使用DAC登录数据库,检查具体情况,方案二:直接去查看错误日志,查看具体错误信息.于是为了快点找到原…

Problems (1) 给一棵带边权的树,求遍历这棵树(每个节点至少经过一次)再回到起点的最短路程. 答案是显然的:边权之和的两倍. (2)给一棵带边权的树,求遍历这棵树(每个节点至少经过一次)的最短路程. (3)给一棵带边权的树T(V,  E ),求T的含K个节点的连通子图的边权和的最小值.…

Problems with mmm for mysql posted in MySQL by shlomi 原文:http://code.openark.org/blog/mysql/problems-with-mmm-for-mysql 出于兴趣和研究目的翻译了此文,最近也看了大众点评关于后台使用MMM来做高可用的一些信息(貌似2014年开始转用MHA来做HA),想评估下下MMM在实际生产环境当中的可用性. 正文: 我最近在部署MMM for MySQL的时候遭遇到了一些问题,这使我决定不把它…

Reproduce: Ctrl + H, Select "File Search", will encounter eclipse kinds of bug/error alert: problems encountered during text search Reason: It's because Ctrl + H by default will search disk files, and when the disk files get un-sync with eclipse…

在Ubuntu中安装软件的时候经常碰到E: Unable to correct problems, you have held broken packages.的错误,顾名思义是因为某些软件包冲突导致,幸运的话sudo apt-get update && sudo apt-get upgrade 可以解决,但这种情况属于可遇不可求,更多的适合这么做不济于事.这样一来如何彻底解决就成了一个问题,经过多次摸索之后,将可行的解决方法记录如下: 以安装libxml2-dev时错误为例,安装时提示如…

在用apt 安装软件时,有时会用国内的源以加快下载速度. 但是在使用ubuntu 14.04的过程中,这一过程可能会导致错误“Unable to correct problems, you have held broken packages”. 经测试,网上的apt-get install -f, aptitude等都无效.其实只要将源换成官方的源,然后apt-get update, apt-get upgrade即可解决.…

以前做过的题目了....补集+DP        Check the difficulty of problems Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 4091   Accepted: 1811 Description Organizing a programming contest is not an easy job. To avoid making the problems too difficult,…

1.安装 a. 查看源 gem sources -l b. 设置源: sudo gem sources -a http://ruby.taobao.org c. 删除源:sudo gem sources -r https://rubygems.org/ d. 安装cocoaPads: sudo gem install cocoapods e. 设置:pod setup 2. cocoaPods使用 a. 搜索 :pod searchSDWebImage b. 切换到项目的根目录echo"pod'…

10 Common Problems Causing Group Policy To Not Apply Group Policy is a solid tool and is very stable. Microsoft has made constant improvements to it since Windows 2000. It allows for the configuration and deployment of pretty much anything in your Ac…

P54A (*) Check whether a given term represents a binary tree Write a predicate istree which returns true if and only if its argument is a list representing a binary tree. Example: (istree (a (b nil nil) nil)) T (istree (a (b nil nil))) NIL (define (i…

L-99: Ninety-Nine Lisp Problems 列表处理类问题的解答,用Scheme实现,首先定义几个在后续解题中用到的公共过程: ; common procedure (define (check-element xs f) (call/cc (lambda (break) (for-each (lambda (x) (if (f x) (break #t))) xs) #f))) (define (foldl f init xs) (define (iter xs acc)…

在android studio或者eclipse中打开layout文件,发现不能预览布局,提示以下错误: Rendering Problems Exception raised during rendering: Unable to find the layout for Action Bar. 解决办法:切换到design视图,选择低一点的api版本即可.…

Rendering Problems No Android SDK found. Please configure an Android SDK.…

activity_main.xml选择Design显示rendering problems no render target selected 在stackOverflow上找到了答案: You need to run the AVD Manager to add a virtual device that matches the target API version your project is set to. Click Tools->Android->AVD Manager. Clic…

We're using HttpWebRequest to hit HTTPS urls, on iOS. In Debug, local builds, etc. everything works fine. The HTTPS urls we're hitting have valid, commercially signed, perfectly normal certificates, everything checks out there. All is well. The app w…

在android studio中打开layout文件,发现不能预览布局,提示以下错误: Rendering Problems Exception raised during rendering: Unable to find the layout for Action Bar. 解决办法:切换到design视图,选择低一点的api版本即可.…

Check the difficulty of problems Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 5830 Accepted: 2542 Description Organizing a programming contest is not an easy job. To avoid making the problems too difficult, the organizer usually expect…

Check the difficulty of problems Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 5457   Accepted: 2400 Description Organizing a programming contest is not an easy job. To avoid making the problems too difficult, the organizer usually exp…

by Henry Robinson, April 26, 2010 The 'CAP' theorem is a hot topic in the design of distributed data storage systems. However, it's often widely misused. In this post I hope to highlight why the common 'consistency, availability and partition toleran…

Analyzing The Papers Behind Facebook's Computer Vision Approach Introduction You know that company called Facebook? Yeah, the one that has 1.6 billion people hooked on their website. Take all of the happy birthday posts, embarrassing pictures of you…

前几天发布应用时出现了如下所示的一段错误提示信息: weblogic.descriptor.DescriptorException: VALIDATION PROBLEMS WERE FOUND problem: cvc-enumeration-valid: string value '3.0' is not a valid enumeration value for web-app-versionType in namespace http://java.sun.com/xml/ns/java…