Live version here:

A backend for retrieving sentiment analysis on hacker news comments.

This app used the VADER sentiment analysis.

Vader Citation

Hutto, C.J. & Gilbert, E.E. (2014). VADER: A Parsimonious Rule-based Model for Sentiment Analysis of Social Media Text. Eighth International Conference on Weblogs and Social Media (ICWSM-14). Ann Arbor, MI, June 2014.