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How do I replace NA values with zeros in an R dataframe?
I have a data frame and some columns have NA values.
21 Answers
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How to recursively delete an entire directory with PowerShell 2.0?
What is the simplest way to forcefully delete a directory and all its subdirectories in PowerShell? I am using PowerShell V2 in Windows 7.
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How to check if an activity is the last one in the activity stack for an application?
I want to know if user would return to the home screen if he exit the current activity.
10 Answers
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How to check visibility of software keyboard in Android?
I need to do a very simple thing - find out if the software keyboard is shown. Is this possible in Android?
42 Answers
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Difference between database and schema
What's the difference between a Database and a Schema in SQL Server? Both are the containers of tables and data.
5 Answers
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How do I pull from a Git repository through an HTTP proxy?
Note: while the use-case described is about using submodules within a project, the same applies to a normal git clone of a repository over HTTP.
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Get the size of the screen, current web page and browser window
How can I get windowWidth , windowHeight , pageWidth , pageHeight , screenWidth , screenHeight , pageX , pageY , screenX , screenY which will work in all major browsers?
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How to escape double quotes in JSON
I'm trying to show double quotes but it shows one of the backslashes:
7 Answers
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JUnit tests pass in Eclipse but fail in Maven Surefire
I have written some JUnit tests using JUnit 4 and spring-test libraries. When I run the tests inside Eclipse then run fine and pass. But when I run them using Maven (during the build process), they fail giving a spring related error. I am not sure what is causing the problem, JUnit, Surefire or Spri...
How can I change the version of npm using nvm?
I've been using NVM to install the latest versions of nodeJS for my node work. It works totally fine for installing separate versions and switching between them. It also installs the latest version of NPM within each local .../bin folder along with the node binary. However, there doesn't seem to be ...