Heike Terhechte

Thoughts, lessons, and the occasional rabbit hole

Software Engineering

Search, APIs, messaging, developer tools, and the systems behind products.

7 articles

2021

Software Engineering

From localhost to a web server - How to host your Streamlit App on Heroku (for free)

You have built a great streamlit app. So far, you only ran it locally on your computer on localhost:8501. Now you would like to share your app with others, but wonder how. This blogpost introduces you to one option: Heroku. Heroku is a platform as a service that allows you to deploy your apps (not just streamlit apps, but also jvm apps, ruby apps etc.). This post will guide you through the deployment of a streamlit app on Heroku. It’s free for non-commercial apps smaller than 300 MB. You need

2020

Software Engineering

Mastering ElasticSearch Queries If You Have Only Worked With SQL Before

Elasticsearch is often the storage engine of choice for storing and querying full text data. But writing an ElasticSearch query is pretty different compared to querying a relational database in SQL. In this blogpost, you will learn some basics you need to understand before working with ElasticSearch. In the second part, you learn how to write queries in ElasticSearch.

Software Engineering

How the Inverted Index and Scoring Work in ElasticSearch

Searching through full text fields with regexes in relational database systems like PostgreSQL or MySQL is painful: The query latency is high and your results will be unordered, so you have no idea how relevant your query results are. Elasticsearch is often the storage engine of choice for storing and querying full text data. In ElasticSearch querying fulltext fields is among the least resource intensive tasks and your query results are ordered putting the most relevant results on top. But how does this work?

2018

Software Engineering

Everything You Need to Know to Use Git for Version Control

So many people have recommended Git as a version control system to me. I had a look at it, but I was pretty overwhelmed. Since I did not have a technical background, everything seemed so complex! Many tutorials let me copy paste code without giving you a deeper understanding of what and why I am actually doing this. This copy pasting feels like success at first, but when I tried working with it, I could not.