dynamic

问题 I have a java application responding multiple domains and uses, for each domain, a specific apache virtual host. This because Apache is faster than tomcat, to serve static resources. The need is to do that at runtime, without restart apache configuration. To perform this action I'm using VirtualDocumentRoot directive, as described below: AddType text/html .html .shtml AddOutputFilter INCLUDES .html .shtml NameVirtualHost *:80 UseCanonicalName Off <VirtualHost *:80> ServerName domain.com

问题 How do you instantiate a type dynamically based upon a lookup value in a dictionary in Swift? 回答1: Hopefully this is useful to others. It took some research to figure this out. The goal is to avoid the anti-pattern of giant if or switch statements to create each object type from a value. class NamedItem : CustomStringConvertible { let name : String required init() { self.name = "Base" } init(name : String) { self.name = name } var description : String { // implement Printable return name } }

问题 I am working on an object encryption class. I have everything worked out but I want to be able to encrypt/decrypt any object type with one deserialize method. As of now the only thing holding me up is the deserialize method. I have the function returning type(object) in the hopes of returning a weak typed object. It works as long as I cast the type during the return value assignment, but If I deserialize into type 'object' the result is byte[]. This means that I have to write a deserialize

问题 I want to set the gravity of an array of Imageviews,ImageIcons[i] to the center with the following code, ImageIcons[i] = new ImageView(this); ImageIcons[i].setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); layout.addView(ImageIcons[i]); And I am stuck up while setting the gravity.I request the SO people to guide me on this. Thanks 回答1: Try this LinearLayout.LayoutParams layoutParams=new LinearLayout.LayoutParams(width, height); layoutParams.gravity

问题 I need a method where i could pass on a parameter which i assume would be a Class (not sure though) and in that method, instanceof would be used to check if x is an instance of the passed Class. How should i do that? I tried a few things but none worked. 回答1: How about this: public boolean checker(Object obj) { return obj instanceof SomeClass; } or if SomeClass is a parameter: public boolean checker(Object obj, Class someClass) { return someClass.isInstance(obj); } or if you want the instance

问题 I need a method where i could pass on a parameter which i assume would be a Class (not sure though) and in that method, instanceof would be used to check if x is an instance of the passed Class. How should i do that? I tried a few things but none worked. 回答1: How about this: public boolean checker(Object obj) { return obj instanceof SomeClass; } or if SomeClass is a parameter: public boolean checker(Object obj, Class someClass) { return someClass.isInstance(obj); } or if you want the instance

问题 I need a method where i could pass on a parameter which i assume would be a Class (not sure though) and in that method, instanceof would be used to check if x is an instance of the passed Class. How should i do that? I tried a few things but none worked. 回答1: How about this: public boolean checker(Object obj) { return obj instanceof SomeClass; } or if SomeClass is a parameter: public boolean checker(Object obj, Class someClass) { return someClass.isInstance(obj); } or if you want the instance

问题 The idea is that given a specific input to the program, somehow I want to automatically step-in through the complete program and dump its control flow along with all the data being used like classes and their variables. Is their a straightforward way to do this? Or can this be done by some scripting over gdb or does it require modification in gdb? Ok the reason for this question is because of an idea regarding a debugging tool. What it does is this. Given two different inputs to a program,

问题 The idea is that given a specific input to the program, somehow I want to automatically step-in through the complete program and dump its control flow along with all the data being used like classes and their variables. Is their a straightforward way to do this? Or can this be done by some scripting over gdb or does it require modification in gdb? Ok the reason for this question is because of an idea regarding a debugging tool. What it does is this. Given two different inputs to a program,

问题 The idea is that given a specific input to the program, somehow I want to automatically step-in through the complete program and dump its control flow along with all the data being used like classes and their variables. Is their a straightforward way to do this? Or can this be done by some scripting over gdb or does it require modification in gdb? Ok the reason for this question is because of an idea regarding a debugging tool. What it does is this. Given two different inputs to a program,