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

“cannot resolve symbol R” in Android Studio

“cannot resolve symbol R” in Android Studio

In every instance in all of my classes where I reference R.id.something, the R is in red and it says "cannot resolve symbol R". Also every time there is R.layout.something it is underlined in red and says "cannot resolve method setContentV

Why saving changes to a database fails?

Why saving changes to a database fails?

I have following C# code in a console application.Whenever I debug the application and run the query1 (which inserts a new value into the database) and then run query2 (which displays all the entries in the database), I can see the new entr

How to solve java.lang.NoClassDefFoundError?

How to solve java.lang.NoClassDefFoundError?

I've tried both the example in Oracle's Java Tutorials. They both compile fine, but at run-time, both come up with this error:Exception in thread "main" java.lang.NoClassDefFoundError: graphics/shapes/Square at Main.main(Main.java:7)Caus

PreparedStatement IN clause alternatives?

PreparedStatement IN clause alternatives?

What are the best workarounds for using a SQL IN clause with instances of java.sql.PreparedStatement, which is not supported for multiple values due to SQL injection attack security issues: One ? placeholder represents one value, rather tha

How to resolve the error “[ErrorException] file_get_contents(/var/www/laravel/.env): failed to open

How to resolve the error “[ErrorException] file_get_contents(/var/www/laravel/.env): failed to open

I'm using Ubuntu 14.04 on my machine. I installed composer and then laravel in the document root i.e. /var/wwwI also gave -R 777 persmission to folder laravel present in directory /var/wwwThen I go to directory laravel using cd /var/www/lar

Disable stylecop analysis for specific projects within solution

Disable stylecop analysis for specific projects within solution

Is there a way to easily stop StyleCop warnings from being displayed within specific projects in a solution. Or, more pointedly, a way to select which projects StyleCop analysis should be performed on by Visual Studio? We have a solution wi

merge static libraries into single

merge static libraries into single

How to merge the static libraries into single one?I do have three static libraries libSignatureLibary_armv6.a , libSignatureLibary_armv7.a and libSignatureLibary_i368.aNow i want to merge this three file into one single library which may

Recommended two-way encryption gems for Ruby? [closed]

Recommended two-way encryption gems for Ruby? [closed]

I'm in need of a two-way encryption solution for Ruby, such as Blowfish, Rijndael (AES) or other. The problem, however, is that I can't find an appropriate gem for it. I would like for the library to support several different encryption alg

“Starting emulator for AVD” then Panic: could not open…\"

“Starting emulator for AVD” then Panic: could not open…\"

I'm new to android app dev. When I created a new AVD, when I click start on this AVD: I get the following: Starting emulator for AVD 'Nexus_4_16_AVD'PANIC: Could not open: Nexus_4_16_AVD 1:This is a bug in the ADT Plugin. For a workaroun

How to make Xcode automatically conform to a protocol

How to make Xcode automatically conform to a protocol

When I use a prototype table view, I always have to conform to the protocol TableViewDataSource. I always forget what methods I need to implement, so I have to look at the source of the protocol every time. This is really time consuming.I t

How to programmatically trigger fancybox with an inline div?

How to programmatically trigger fancybox with an inline div?

I want to make a fancybox appear when someone tries to submit a form. So I've got this:$('#login-form').submit(function(e) { $.fancybox({ content: 'Hello Fancybox', modal: true }); return false;});Works good, but I'd

How can I detect a page refresh in an angularjs single page application without configuring routes?

How can I detect a page refresh in an angularjs single page application without configuring routes?

I need to detect a page refresh event in my single page application. 1:You can't for sure, because a browser page refresh is equivalent to exiting the app then opening it again.What you can do is detect the page exit event and the app op

iOS Google+ Safari cannot open page because address is invalid

iOS Google+ Safari cannot open page because address is invalid

I have two apps one is free and another is paid version. I have implemented google+ share on paid and its working fine. But when I copied code to my free version it doesn't work. I have one Google apis project and added two clients for both

“dyld: could not load inserted library '/usr/lib/libgmalloc.dylib' because image not found

“dyld: could not load inserted library '/usr/lib/libgmalloc.dylib' because image not found

When I run the app in Xcode IOS 6 beta 2 firmware on the device 8 Beta 2, I get the error message: "dyld: could not load inserted library '/ USR / Library / libgmalloc.dylib", because the image was not found. "What could be the problem?

IE9 Support for HTML5 Canvas tag

IE9 Support for HTML5 Canvas tag

I am trying to test out the canvas tag, I started with this code: This text is displayed if your browser does not support HTML5 Canvas. In IE8 I get the message: This text is displayed if your browser does not support HTML5 Canvas.I th

Android Studio Error “output path is not specified for modules”

Android Studio Error “output path is not specified for modules”

I just recently upgraded to the newest version of Android Studio (0.1.1), but I also used Android Studio to relocate my project to my Dropbox folder. So, I'm not exactly sure which one is causing this problem. When I build or try to run my

Facebook debugger: why complaining about app_id missing

Facebook debugger: why complaining about app_id missing

While using the facebook debugger, it complains: Warning fb:app_id hasn't been included in the meta tags. Specify the app ID so that stories shared to Facebook will be properly attributed to the app. Alternatively, app_id can be set in ur

How to check if a file exists before creating a new file

How to check if a file exists before creating a new file

I want to input some contents to a file, but I'd like to check first if a file with the name I wish to create exists. If so, I don't want to create any file, even if the file is empty. My attemptbool CreateFile(char name[], char content[])

How can I keep container running on Kubernetes?

How can I keep container running on Kubernetes?

I'm now trying to run a simple container with shell(/bin/bash) on Kubernetes Cluster.I thought that there is a way to keep container running on docker container by using pseudo-tty and detach option(-td option on docker run command).For Exa

Convert JNI types to Native types

Convert JNI types to Native types

While there is documentation regarding turning a jstring to a native string (string nativeString = env->GetStringUTFChars(jStringVariable, NULL);) I can't find an example which will convert a jboolean to a bool or a jint to an int. Can any

Random chat with 2 users at a time (Socket.io)

Random chat with 2 users at a time (Socket.io)

I just started learning NodeJS and Socket.io... Until now I have this demo code, from official socket.io site:http://socket.io/demos/chat/I am able to get the unique client's ID of each user (socket) which connects, I am still trying to fig

How to implement pedometer in iphone?

How to implement pedometer in iphone?

I have implemented one application in which i want to implement pedometer functionality.Is it possible to implement pedometer?Please give me idea. 1:This is certainly possible, and I believe has been done. The main drawback is that since

How to consume third party https wsdl web service in c#

How to consume third party https wsdl web service in c#

In SoapUI tool I've configured .Jks file with Outgoing WS-Security Configurations Signature is BinarySecurityToken and algorithm is CanonicalizationMethod and SignatureMethod it is working perfectly.Now I try to consume from C# code as belo

ajax call to servlet and redirect to jsp

ajax call to servlet and redirect to jsp

Here in the below code i want to call a servlet through ajax and then i redirect the data from servlet to jsp.ajax call to servlet is working fine but the problem is redirecting to the jsp page is not displayed in the browser and the same j