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Difference between java.io.PrintWriter and java.io.BufferedWriter?
...thods like println(). You can essentially use a PrintWriter to write to a file just like you would use System.out to write to the console.
A BufferedWriter is an efficient way to write to a file (or anything else), as it will buffer the characters in Java memory before (probably, depending on the ...
Undo scaffolding in Rails
...oy/undo it using
rails destroy scaffold MyFoo
That will delete all the files created by generate, but not any additional changes you may have made manually.
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How to add pandas data to an existing csv file?
...o use the pandas to_csv() function to add a dataframe to an existing csv file. The csv file has the same structure as the loaded data.
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What does “#pragma comment” mean?
...tive which indicates Visual C++ to leave a comment in the generated object file. The comment can then be read by the linker when it processes object files.
#pragma comment(lib, libname) tells the linker to add the 'libname' library to the list of library dependencies, as if you had added it in the ...
Rails Root directory path?
...an access rails app path using variable RAILS_ROOT.
For example:
render :file => "#{RAILS_ROOT}/public/layouts/mylayout.html.erb"
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source of historical stock data [closed]
...ith granularity as low as 1 minute and stores the prices locally in a text file. It basically downloads the real-time data from Yahoo with a 15 minute delay. Since I wanted a more robust solution and I'm working on a big school project for which we need data, I decided to write my own data feed engi...
Linux command: How to 'find' only text files?
...ich I have found to be a very fast way to use find to find only non-binary files:
find . -type f -exec grep -Iq . {} \; -print
The -I option to grep tells it to immediately ignore binary files and the . option along with the -q will make it immediately match text files so it goes very fast. You c...
Visual Studio retrieving an incorrect path to a project from somewhere
...
Go to Manage Workspaces (either through the File/Source Control menu or the workspace drop down in Source Control Explorer)
select edit for your workspace.
You should see, under working folders, a mapping for the source
control directory to the old/wrong project direct...
CMake unable to determine linker language with C++
... language for target "helloworld".
In my case this was due to having C++ files with the .cc extension.
If CMake is unable to determine the language of the code correctly you can use the following:
set_target_properties(hello PROPERTIES LINKER_LANGUAGE CXX)
The accepted answer that suggests app...
Unable to locate tools.jar
...staller gave me a directory structure like this:
Directory of C:\Program Files\Java
05/08/2012 09:43 AM <DIR> .
05/08/2012 09:43 AM <DIR> ..
05/08/2012 09:46 AM <DIR> jdk1.7.0_04
05/08/2012 09:19 AM <DIR> jre6
05/08/2012 ...