core

“renderInContext:” and CATransform3D

半腔热情 提交于 2019-12-09 04:27:23
问题 I have an view that have mutiples views inside it, and an image presentation (aka. 'cover flow') into that too... And I need to make a screenshot programatically ! Since docs says that "renderInContext:" will not render 3d animations : "Important The Mac OS X v10.5 implementation of this method does not support the entire Core Animation composition model. QCCompositionLayer, CAOpenGLLayer, and QTMovieLayer layers are not rendered. Additionally, layers that use 3D transforms are not rendered,

基于ASP.NET Core 3.0快速搭建Razor Pages Web应用

人走茶凉 提交于 2019-12-08 23:06:01
前言 虽然说学习新的开发框架是一项巨大的投资,但是作为一个开发人员,不断学习新的技术并快速上手是我们应该掌握的技能,甚至是一个.NET Framework开发人员,学习.NET Core 新框架可以更快速掌握其中的编写,构建,测试,部署和维护应用程序。 您现有的.NET Framework应用程序可以在其他操作系统上工作。对于希望扩大类库的受众平台,或者希望在分布式应用程序的其他领域使用相同代码的开发人员来说,这是非常好的选择。 .NET Core是为了重新启动某些Framework组件而为其他人提供跨平台工作的机会。由于.NET Framework主要以托管(C#)代码为基础构建,因此这些部分不需要更改代码即可移至.NET Core。依赖于Windows特定组件的库必须被移除或重构以使用跨平台替代方案。这同样适用于您的应用程序。 选择学习.NET Core,是因为有强大的多功能性: 加上微软社区的大量工作,使.Net Core成为市场上具有竞争力的框架,帮助开发人员快速开发具有最佳性能和可扩展性的强大应用程序。 在本章,我们将介绍生成 ASP.NET Core Razor Pages Web 应用的基础知识,基于ASP.NET Core应用程序中的Razor视图引擎,快速的搭建一个博主的管理系统应用,并且在后续中,我们可以基于这个模板进行快速开发迭代。 工具

How can I get rid of `let` in Core?

狂风中的少年 提交于 2019-12-08 15:50:41
问题 I have a function that is called frequently in an internal loop. It looks like this: import qualified Data.Vector.Storable as SV newtype Timedelta = Timedelta Double cklsLogDens :: SV.Vector Double -> Timedelta -> Double -> Double -> Double cklsLogDens p (Timedelta dt) x0 x1 = if si <= 0 then -1e50 else c - 0.5*((x1-mu)/sd)^2 where al = p `SV.unsafeIndex` 0 be = p `SV.unsafeIndex` 1 si = p `SV.unsafeIndex` 2 xi = p `SV.unsafeIndex` 3 sdt = sqrt dt mu = x0 + (al + be*x0)*dt sd = si * (x0 ** xi

When to use system.exit(0)? [duplicate]

二次信任 提交于 2019-12-08 14:13:48
问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in java Can anyboby please explain the use of system.exit(0)? What will happen internaly when we call this method especially the argument value? 0,1,2,3.. etc 回答1: System.exit will ask the VM process to stop, and the code returned will be the code given in parameter. Common codes are: 0 for success, 1 to 127 for error, 128-255 is used by Unix and

aspnet boilerplate 随笔

左心房为你撑大大i 提交于 2019-12-08 13:59:31
使用abp模板进行项目开发:   1:准备工作:我使用v2.x版本,所以会依赖.net core 2.2 查看并更新本地环境:     更新.net core版本:cmd 运行 dotnet --version查看本机版本(我的是core 2.1)     通过下载安装sdk更新core版本:https://dotnet.microsoft.com/download/visual-studio-sdks (根据自己的vs版本做对应的选择)        2:打开官网:https://aspnetboilerplate.com/ 点击get started 选择你需要的环境进行开发(根据自己情况来),最后点击creat my project!下载项目        3:下载解压后打开解决方法: E:\4.8.0\aspnet-core\MPADemo.sln,     a:先将解决方案中所有的连接字符串改为自己本机的连接字符串     b: 使用:程序包管理工具控制台: update-databse进行更新,更新后去数据库看是否已经生成库:MPADemoDb     c: 重新编译整个项目,设置MPADemo.web.Host为启动项目,可以看出来集成了swagger                  d:再试一试将 MPA.we.host设置为启动项,进入登陆界面 查用户名:

core dumped in C programming

守給你的承諾、 提交于 2019-12-08 13:16:49
问题 I have a homework that's supposed to ask the user for a number and make a square with the length being the number they put. If the user types in 5, then the program needs to make a square that is 5x5. When I compile it, i get a segmentation fault (core dumped). I have no idea where the problem is. Can you guys help me? I even tried running the program with paper and pencil to see what my output would be and it seemed fine to me. #include <stdio.h> int main (){ int size, limit = 0; char ch =

ASM(一) 利用Core API 解析和生成字节码

*爱你&永不变心* 提交于 2019-12-08 10:03:21
ASM 是一个提供字节码解析和操作的框架。Cglib框架就是基于ASM框架实现的,被广泛应用的Hibernate,Spring就是基于Cglib 实现了AOP技术。 在说到AOP的Java实现,可能会优先想到java的Proxy api,通过invoke方法拦截处理相应的代码逻辑,但是proxy 是面向接口的,被代理的class的所有方法调用都会通过反射调用invoke 方法,相对性能开销大。另外的还有Java 5提供的Instrument,比较适用于监控检查方面,但在处理灵活的代码逻辑方面并不合适。 ASM 框架对用户屏蔽了整个类字节码的长度,偏移量,能够更加灵活和方便得实现对字节码的解析和操作。其主要提供了两部分主要的API,Core Api 及Tree Api。 ASM 提供了两组API:Core和Tree: Core是基于访问者模式来操作类 Tree是基于树节点来操作类的 本文先从Core Api的解析和生成字节码开始介绍。 ASM 内部采用 访问者模式 将 .class 类文件的内容从头到尾扫描一遍,每次扫描到类文件相应的内容时,都会调用 ClassVisitor 内部相应的方法。 比如: 扫描到类文件时,会回调 ClassVisitor 的 visit() 方法; 扫描到类注解时,会回调 ClassVisitor 的 visitAnnotation() 方法;

How to make OpenMP thread or task run on a certain core

女生的网名这么多〃 提交于 2019-12-08 07:54:50
问题 Is there a way to make an OMP thread or task run on a certain core? I found this, followed the link, but I couldn't find the source code to test it. Also this is an Intel solution to it (I think). Does OMP support this itself? 回答1: As far as I know as of OpemMP 3.0 they're all vendor specific extensions. For example GOMP (GCC's implementation) honours the environment variable GOMP_CPU_AFFINITY for setting thread affinity. In their documentation they give the example: GOMP_CPU_AFFINITY="0 3 1

EF context not responding in docker

微笑、不失礼 提交于 2019-12-08 07:00:32
问题 I just upgraded my Web API application to .NET core 3.0, all works fine when running in debug mode in IIS Express, but context does not respond when running in docker container either on server or in VS debug. No error thrown, just never responds. I tried deploying an updated image to server which is where I first noticed the issue. I then tried running as docker in vs to debug. I have updated all NuGet packages and set frameworks to .NET Core 3.0 or .NET Standard 2.1. I have inspected the

How to disable position change of JSlider on mouse right click

只愿长相守 提交于 2019-12-08 04:42:57
问题 I am using a JSlider in my application. I want only left click to slide JSlider , and I want to disable right click for JSlider . I am able to get event on right click, but slider is changing its value to other position. jSlider.addChangeListener(new ChangeListener() { public void stateChanged(ChangeEvent e) { //code } }); jSlider.addMouseListener(new MouseAdapter() { public void mouseReleased(MouseEvent e) { if (e.getButton() == java.awt.event.MouseEvent.BUTTON3) { //code } else { //code } }