I Started to use JabRef as a database of BibTex reference for using it with LaTex and LibreOffce. Googling around I found a post that were using a plugin to integrate JabRef with Libreoffice, however it was old and today is not necessary to instal a plugin. Steps to integrate LibreOffice with JabRef Configure LibreOffice Go to Preferences > LibreOffice > Advanced and make sure that “Use a Java runtime environment” is checked and that a runtime is properly selected in the installed list....

The first time you deal with foldr seems to be nothing more than a new function like map, filter. However, when you get the concept of a recursion scheme, foldr becames a magical function. Commonly recursion calls are like this one: sum:: Num a => [a] -> a sum [] = 0 sum (x:xs) = x + (sum xs) Very easy and intuitive to read, but what if we try to compute prod?...

The first thing I check when I got this error was to check if libjpeg was installed. Lets try this sudo apt-get install libjpeg libjpeg-dev sudo apt-get install libfreetype6 libfreetype6-dev download jpeg source tar -xzvf jpegsrc.v8c.tar.gz cd jpeg-6b/ ./configure make sudo make install For zlib support (png/zip) sudo ln -s /usr/lib/x86_64-linux-gnu/libz.so /usr/lib So download Python Imaging Library 1.1.7 Source Kit (all platforms) The after run the setup.py install, check if the support was ok...