runtime

Best way to create an instance of run-time determined type [duplicate]

Deadly 提交于 2019-12-03 05:37:04
This question already has an answer here: How to create a new object instance from a Type 12 answers What's the best way (in .NET 4) to create an instance of a type determined at runtime. I have an instance method which although acting on a BaseClass object may be called by instances of its derived classes. I require to create another instance of the same type as this within the method. Overloading the Method for each derived class is not practical as it is fairly involved and would be more efficient to keep to the single implementation. public class BaseClass { //constructors + properties +

Cannot load Android Device Monitor

假如想象 提交于 2019-12-03 05:24:40
This error shows up when I click to open Android Device Monitor Snippet from the log file: java.lang.NullPointerException at org.eclipse.core.runtime.URIUtil.toURI(URIUtil.java:280) at org.eclipse.e4.ui.internal.workbench.ResourceHandler.loadMostRecentModel(ResourceHandler.java:127) at org.eclipse.e4.ui.internal.workbench.swt.E4Application.loadApplicationModel(E4Application.java:370) at org.eclipse.e4.ui.internal.workbench.swt.E4Application.createE4Workbench(E4Application.java:220) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:557) at org.eclipse.core.databinding.observable.Realm

Dynamically combine Boost.Spirit.Qi rules at runtime (arbitrary number of alternatives)

ⅰ亾dé卋堺 提交于 2019-12-03 05:09:07
问题 I was wondering whether there is a way in Boost.Spirit.Qi to dynamically combine an arbitrary number of rules at runtime. The inner workings of Boost.Spirit are still a bit of a mystery to me, but since rules are implemented as objects it seems feasible. My motivation is to make certain parts of my grammar easily extendable. Consider the following contrived example: namespace qi = boost::spirit::qi; namespace px = boost::phoenix; typedef std::string::const_iterator iterator_t; template

What's the best way to suppress a runtime console warning in Java?

耗尽温柔 提交于 2019-12-03 05:07:19
I am using the getResponseBody() method of the org.apache.commons.httpclient.methods.PostMethod class. However, I am always getting a message written to the console at runtime: WARNING: Going to buffer response body of large or unknown size. Using getResponseBodyAsStream instead is recommended. In the code I have to write the response to a byte array anyway, so it is the getResponseBody() method that I ought to use. But is there an easy way that I can suppress the warning message so I don't have to look at it at every run? If it was a compiler error, I'd use the @SuppressWarnings annotation,

Android determine screen orientation at runtime

我是研究僧i 提交于 2019-12-03 04:55:50
问题 Here's a pseudo code to detect screen rotate event, and decide to retain or changes the screen orientation. public boolean onOrientationChanges(orientation) { if(orientation == landscape) if(settings.get("lock_orientation")) return false; // Retain portrait mode else return true; // change to landscape mode return true; } How do I make similar things in Android? EDIT: I'm actually looking answer on Where to handle orientation changes . I do not want to fix the orientation by adding

发布.Net Core应用(Alipay)到Docker

随声附和 提交于 2019-12-03 04:55:11
对于刚刚完成的Alipay支的Demo, 我想要把它部署到Docker中去, 下面我来演示相关步骤. 创建配置文件 配置文件的重中之重是Dockerfile, 他的内容如下: # 第一部分是编译并发布项目 # 以微软.Net Core SDK作为基础镜像, 并且以build作为别名 FROM mcr.microsoft.com/dotnet/core/sdk:3.0 AS build # 切换build镜像工作目录到/app WORKDIR /app # 拷贝sln和csproj项目文件 COPY *.sln . COPY AliPay/*.csproj ./AliPay/ # Restore项目用到的包 RUN dotnet restore # 拷贝项目文件到镜像里面相应到目录 COPY AliPay/. ./AliPay/ # 切换build镜像工作目录到/app/AliPay WORKDIR /app/AliPay # 以Release模式发布应用到out文件夹 RUN dotnet publish -c Release -o out # 第二部分是启动项目 # 以微软.Net Core运行环境作为基础镜像, 并且以runtime作为别名 FROM mcr.microsoft.com/dotnet/core/aspnet:3.0 AS runtime #

Familiarize Yourself with ObjC's Roots学习

巧了我就是萌 提交于 2019-12-03 04:54:41
Effective Objective-C - Familiarize Yourself with Objective-C's Roots 把Objective-C 和 C++ 两门面向对象编程语言进行对比。它们语法出现差异的原因,是触发对象行为的方式不同,Objective-C 是向对象传递消息的结构模式(Objective-C 演变自 Smalltalk, Smalltalk 使用了传递消息的机制),而 C++ 是函数调用。 代码举例: // Messaging (OBJC) Object *obj = [Object new]; [obj performWith:parameter1 and:parameter2]; // Function calling (C++) Object *obj = new Object; obj -> perform(parameter1, parameter2); Objective-C 的动态绑定特性,在 运行时(runtime)进行对象方法的匹配,而不是在编译的时候。 在 运行时 阶段,一组代码会和你的代码进行合并起来,并且把你的代码和动态库相连接。 Objective-C 中对象在内存中的存储方式。 NSString *someString = @"The string"; NSString *anotherString =

Meaning of lg * N in Algorithmic Analysis

白昼怎懂夜的黑 提交于 2019-12-03 04:45:23
I'm currently reading about algorithmic analysis and I read that a certain algorithm (weighted quick union with path compression) is of order N + M lg * N. Apparently though this is linear because lg * N is a constant in this universe. What mathematical operation is being referred to here. I am unfamiliar with the notation lg * N. The answers given here so far are wrong. lg* n (read "log star") is the iterated logarithm. It is defined as recursively as 0 if n <= 1 lg* n = 1 + lg*(lg n) if n > 1 Another way to think of it is the number of times that you have to iterate logarithm before the

Centos7 Nginx部署.Net Core with Supervisor

馋奶兔 提交于 2019-12-03 03:57:20
首先安装.NET Core Runtime: sudo rpm -Uvh https://packages.microsoft.com/config/centos/7/packages-microsoft-prod.rpm 安装.NET Runtime sudo yum install aspnetcore-runtime-3.0 -y 安装完成后使用以下命令验证安装: dotnet --info 显示以下内容表示安装成功: It was not possible to find any installed .NET Core SDKs Did you mean to run .NET Core SDK commands? Install a .NET Core SDK from: https://aka.ms/dotnet-download Host (useful for support): Version: 3.0.0 Commit: 95a0a61858 .NET Core SDKs installed: No SDKs were found. .NET Core runtimes installed: Microsoft.AspNetCore.App 3.0.0 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]

How to compile rhino/javascript files to .class bytecode for java at runtime

核能气质少年 提交于 2019-12-03 03:31:02
I'm making a falling sand game in Java. I want users to be able to write their own engine for it using a simpler language. Falling sand games can be very CPU intensive so I want to have the engine running as fast as possible while not having to manually compile. I need to know how to compile rhino javascript files to .class files by at runtime to be used. I've looked for a way but couldn't find any other than manually compiling it by using the command line which I don't want users to have to do. There's a short tutorial here: Scripting: Compiling Scripts in Java jbeard4 My solution here: Has