How to send email from a Rails app to Amazon SES.
How to use cURL to save Rails’ authenticity token,
and the POST to a Rails endpoint.
Find unused code in your Ruby test suite.
How to run your own web font service.
Know the Postgres index types such as multicolumn indexes and partial indexes,
don’t over-index,
use more joins,
prefer INNER JOINs,
understand the EXPLAIN output,
and don’t try to optimize on your development machine.
Do you know Ruby’s pessimistic operator? It looks like this:
~>
You’ve...
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