Now a study in the journal Emotion has replicated this finding, but the researchers also present evidence suggesting depressed people are not seeking to maintain their negative feelings, but rather that they find sad music calming and even uplifting.
Source: Why Do People With Depression Like Listening To Sad Music?
Chapter PDFs of Introduction to Compilers and Language Design are available for free. The textbook and materials have been developed by Professor Douglas Thain as part of the CSE 40243 compilers class at the University of Notre Dame.
This book offers a one semester introduction into compiler construction, enabling the reader to build a simple compiler that accepts a C-like language and translates it into working X86 or ARM assembly language. It is most suitable for undergraduate students who have some experience programming in C, and have taken courses in data structures and computer architecture.