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Replacing some characters in a string with another character
I have a string like AxxBCyyyDEFzzLMN and I want to replace all the occurrences of x , y , and z with _ .
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Check for installed packages before running install.packages() [duplicate]
I have an R script that is shared with several users on different computers. One of its lines contains the install.packages("xtable") command.
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Copying files into the application folder at compile time
If I have some files I want to copy from my project into the .\bin\debug\ folder on compilation, then it seems I have to put them into the root of the project. Putting them into a subfolder seems to copy them into the .\bin\debug\ folder in the same structure they're stored in.
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How can I set the focus (and display the keyboard) on my EditText programmatically
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How to check if a file is empty in Bash?
...ant to check if it is empty. Did something like this but couldn't get it working.
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Android: How to stretch an image to the screen width while maintaining aspect ratio?
I want to download an image (of unknown size, but which is always roughly square) and display it so that it fills the screen horizontally, and stretches vertically to maintain the aspect ratio of the image, on any screen size. Here is my (non-working) code. It stretches the image horizontally, but n...
What is the right way to POST multipart/form-data using curl?
I used this syntax to post a file along with some parameters:
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Changing all files' extensions in a folder with one command on Windows
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Remove blank lines with grep
I tried grep -v '^$' in Linux and that didn't work. This file came from a Windows file system.
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