What's the difference between “.equals” and “==”? [duplicate]

What's the difference between “.equals” and “==”? [duplicate]

This question already has an answer here: What is the difference between == vs equals() in Java? 23 answers I switched lecturers today and he stated us

Why doesn't the height of a container element increase if it contains floated elements?

Why doesn't the height of a container element increase if it contains floated elements?

I would like to ask how height and float work. I have an outer div and an inner div that has content in it. Its height may vary depending on the content of the inner div but it seems that my inner div will overflow its outside div. What wou

Segmentation fault on large array sizes

Segmentation fault on large array sizes

The following code gives me a segmentation fault when run on a 2Gb machine, but works on a 4GB machine.int main(){ int c[1000000]; cout << "done\n"; return 0;}The size of the array is just 4Mb. Is there a limit on the size of an array

How to really read text file from classpath in Java

How to really read text file from classpath in Java

I am trying to read a text file which is set in CLASSPATH system variable. Not a user variable.I am trying to get input stream to the file as below:Place the directory of file (D:\myDir)in CLASSPATH and try below:InputStream in = this.getCl

Android API to check if call is Active or On Hold

Android API to check if call is Active or On Hold

Is there an API function to check if a call is currently Active, or if has been put on Hold?Assuming I have two connected calls, is there a way to check if each one is active, on-hold, or maybe they are connected in a conference call? 1:

How to merge two ArrayLists without duplicates? [duplicate]

How to merge two ArrayLists without duplicates? [duplicate]

This question already has an answer here: Merging two arrayLists into a new arrayList, with no duplicates and in order, in Java 14 answers I have two a

Waiting for localhost, forever!

Waiting for localhost, forever!

I have a gridview on my homepage with a view and an edit link that use query strings to display table data in read-only and editable pages, respectively. I get no error messages from my code, it's simple enough that it doesn't seem to be mi

Getting the fractional part of a float without using modf()

Getting the fractional part of a float without using modf()

I'm developing for a platform without a math library, so I need to build my own tools. My current way of getting the fraction is to convert the float to fixed point (multiply with (float)0xFFFF, cast to int), get only the lower part (mask w

Is the following move constructor code safe?

Is the following move constructor code safe?

This is the move constructor of class X:X::X(X&& rhs) : base1(std::move(rhs)) , base2(std::move(rhs)) , mbr1(std::move(rhs.mbr1)) , mbr2(std::move(rhs.mbr2)){ }These are the things I'm wary about:We're moving from rhs twice and

Right way to use the @NonNull annotation in Android Studio

Right way to use the @NonNull annotation in Android Studio

I'd like to use the @NonNull annotation in Android, but I can't figure out just the right way to do it.I propose you this example:public void doStuff(@NonNull String s){ //do work with s... }So when i call doStuff(null) the IDE will

Find element by attribute

Find element by attribute

I am trying to find an element with Attribute. Well, I can find elements with Id, tagName, Xpath and all other predefined methods in Selenium. But, I am trying to write a method that specifically returns WebElement, given Attribute name and

How to convert milliseconds to seconds with precision

How to convert milliseconds to seconds with precision

I want to convert milliseconds to seconds (for example 1500ms to 1.5s, or 500ms to 0.5s) with as much precision as possible.Double.parseDouble(500 / 1000 + "." + 500 % 1000); isn't the best way to do it: I'm looking for a way to get the rem

Why are all my log4net levels false?

Why are all my log4net levels false?

I'm using log4net in my ASP.NET MVC3 project, but all logging properties such as IsDebugEnabled == falseIn my AssemblyInfo I have:[assembly: XmlConfigurator(Watch = true)]In my log class I havepublic Log4NetLogger(){ log4net.Config.XmlCo

Could not read from remote repository

Could not read from remote repository

I have received the following error multiple times: Could not read remote repository. Please make sure you have the correct access rights and the repository exists.I am very confused about how to remedy this error. 1:Make sure you are u

C Language: what does the .mm extension stand for?

C Language: what does the .mm extension stand for?

A project with some Objective-C has a few C classes with the implementation files having a .mm extension.file.hfile.mmWhat does the .mm mean? Shouldn't it just be .m? 1:The extension .mm is the extension for the C++ compilation unit expe

Get ControllerName and ActionName and populate the ViewData in Master Page?

Get ControllerName and ActionName and populate the ViewData in Master Page?

I've a SuperController which will be inherited from all the controllers. In the constructor I'm trying to populate the ViewData using the ControllerName and the ActionName.I'm not going to pass the ControllerName and the ActionName as the V

How to get value in the session in jQuery

How to get value in the session in jQuery

I'm a beginner in jQuery.I want to set the values in an HTML page and I have to get them in another HTML page. Here is the piece of code I am trying now:To set the value in session:$.session.set(userName, $("#uname").val());To get the valu

iPhone What happens to previous data when app is upgraded to new version

iPhone What happens to previous data when app is upgraded to new version

I have a query regarding What happens to previous data when app is upgraded to new version .I have a current application having a local database.The user can modify the database.Now If I upgrade the application to next version with some new

How to Access ViewData in javascript

How to Access ViewData in javascript

I am having a problem accessing the ViewData object through javascript. I have set the ViewData object on the controller and on document.ready event of the view i am trying to see the contents of that same ViewData object like so: var

Android app resets on orientation change, best way to handle?

Android app resets on orientation change, best way to handle?

So I am making a basic chess app to play around with some various elements of android programming and so far I am learning a lot, but this time I am lost.When the orientation of the emulator changes the activity gets reset. Based on my rese

Parse boolean arithmetic including parentheses with regex?

Parse boolean arithmetic including parentheses with regex?

Is there a single regular expression that can parse a string (in Python and/or Javascript, does not need to be the same expression) that represents simple boolean arithmetic? For example I want to parse this string:a and (b and c) and d or

How to train image (pixel) data in libsvm format to use for recognition with Java

How to train image (pixel) data in libsvm format to use for recognition with Java

I want to make a Java application to recognize characters by using libsvm but when get into this, I do not understand how could I train the image data to use with libsvm?Recently to learn it, I made a test with existing data:I have also cre

Installing a remote Tomcat server in Eclipse

Installing a remote Tomcat server in Eclipse

I want to deploy and debug a local web application using a remote instance of Eclipse. I went through the normal "Create a server" wizard and specified my hostname as show below:However, the next step requires I specify a local tomcat direc

How to add Jquery to Sublime Text 2?

How to add Jquery to Sublime Text 2?

This may sound stupid.But how do you add Jquery to sublime text 2?Can't seem to get it working.I've added this github.Then created a Jquery folder in my packages.Finally I added this into my head tags.But still no luck. 1:Sublime Text 2

Logout with HttpOnly cookie

Logout with HttpOnly cookie

I can see that HttpOnly cookies are good for security, however they make logging out without server interaction impossible, right?1 So when the network fails, you can't log out and leave. I can imagine a workaround, but I'd like to ask firs