runtime | 易学教程

Java runtime exception when using navigation drawer

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问题 I am trying to run my project but it crashes upon load. I have my proguard here as it has been the source of all issues so far and my error below that. I have tried: reinstalling android studio clean build rebuild project deleting known references to missing classes My proguard file is as shown: -dontwarn android.net.http.** -dontwarn org.apache.http.** -dontwarn org.apache.httpcomponents.** -dontwarn org.apache.commons.codec.** -dontwarn com.android.build.transform.api.** -dontwarn org

Static Libraries and the statically-linked MSVC++ runtime

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问题 For building a static library , is the static C runtime statically linked at compile time (of the library) or at final EXE compile time? 回答1: According to Hans, the CRT (C Runtime) is not linked while compiling a static LIB using MSVC. It is linked at final EXE compile time. However, even though this is true. You still cannot mix C runtimes in static libraries. They all must use the same exact runtime (or the system runtime MSVCRT.dll) 来源： https://stackoverflow.com/questions/9578388/static

Run - Time Check Failure #2 in C File processing

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问题 Run-Time Check Failure #2 - Stack around the variable 'filename' was corrupted. My code works whenever I try to process the first memory location. I can process the .txt file correctly, and I can print it. Nevertheless, when I ask for a second memory location, the program crashes. I tried to increase the size of filename, and I am also closing the first file, so I am clueless. Any help is acceptable! Thank you!! This is a photo of the output This is my code: #include <stdio.h> #define SIZE

How can I find elements in an integer array that add up to K?

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问题 Given an array of integers and a number k. Find a combination of elements in the array that add up to k. Recently I got a coding question where I was given an array of positive integers A and k. Let A = {4, 15, 7, 21, 2} and k = 13 and my algorithm was supposed to return a list of indexes of the elements that add up to k. In this case: [0,2,4]. Each element can only be used once. How would I go about approaching this problem? Also what would be the time and space complexity. 回答1: This is

Using Runtime#exec() with javac - No Class File

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问题 The following MyCompilingUtility.java creates a file (a Java class - AutoGenerated.java ) via a PrintWriter . This class only has a Main method with a print statement. Secondly, this program calls javac AutoGenerated.java . public static void main(String args[]) throws IOException, FileNotFoundException, UnsupportedEncodingException { createFile("AutoGenerated.java"); compile("AutoGenerated.java"); } public static void compile(String fileName) throws IOException { final String javacPath = "C:

Undefined symbols for architecture armv7 when working with objc_setAssociatedObject

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问题 This is the run time error log I am getting: Undefined symbols for architecture armv7: "_MyConstantKey", referenced from: -[LayoutViewController addLabelsAndButtonInBaseView:withLayoutObject:] in LayoutViewController.o ld: symbol(s) not found for architecture armv7 I am trying to pass an object along with UIButton selector. this is my code: this is how I am declaring a var: extern const char MyConstantKey; @interface LayoutViewController : UIViewController my implementation file : #import

Convert gridview field into Dropdownlist

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问题 i need to convert a field in gridview to a dropdownlist, but i need to do this in codebehind, and I cannot add a templatefield in apsx(but it could be created at run time execution...) I populate my grid with this code: foreach (var item in response.Select(x => x.idMatriz).Distinct()) { dr = dt.NewRow(); for (int i = 0; i < colunas; i++) { dr[i] = response.Where(x => x.Propriedade == dt.Columns[i].ToString() && x.idMatriz == item).Select(x => x.Valor).FirstOrDefault(); } dt.Rows.Add(dr); } It

C# Change the location of an object programmatically

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问题 I Tried the following code: this.balancePanel.Location.X = this.optionsPanel.Location.X; to change the location of a panel that I made in design mode while the program is running but it returns an error: Cannot modify the return value of 'System.Windows.Forms.Control.Location' because it is not a variable So how can I do it? 回答1: The Location property has type Point which is a struct. Instead of trying to modify the existing Point , try assigning a new Point object: this.balancePanel.Location

Least common ancestor in python

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问题 Write following functions body. 2 Nodes are passed as parameter. You need to find Least Common Ancestor and print its value. Node structure is as following: class Node{ value; parent; } Here is the code that I have, but it works with a different Node structure. I am trying to replace .left and .right attributes with .parent. Will replacing these attributes take less memory in the program? How will it affect runtime? class Node: def __init__(self, key): self.key = key self.left = None self

javaweb-codereview 学习记录-1

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Servlet 是在 Java Web容器上运行的小程序 ,通常我们用 Servlet 来处理一些较为复杂的服务器端的业务逻辑。值得注意的是在 Servlet3.0 之后( Tomcat7+ )可以使用注解方式配置 Servlet 了。 Servlet3.0 之前的版本都需要在 web.xml 中配置， Servlet 是两对标签，由 <servlet> 和 <servlet-mapping> 组成， Spring MVC 框架就是基于Servlet技术实现的。自己的理解： servlet实际上就是服务后端逻辑的一段代码，配置servlet的过程实际上就是定义处理类与对应url的映射关系，而filter也是处理http请求的，只不过在servlet处理之前可以做一些过滤检测的操作。当然这种配置方式可以配置在文件中，也可以在代码中以@符号来定义注解，效果一样 spring ： struts2： Struts2主要的开发模式是基于xml配置，在 struts.xml 中配置Action地址和对应的处理类。 Java反射获取类方法有两种方式: getMethod(xxx),getMethods() getDeclaredMethod(xxx)、getDeclaredMethods()。区别在于 getMethod会返回当前类和父类的所有public方法，而