Transform Piped Data from Bash using a Node.js Transform Stream

Pipes are one of bash's most powerful features, but sometimes plain bash doesn't give us the tools we need to perform more complicated transformations. In this lesson, we'll see how we can leverage node.js in conjunction with bash. We'll pipe a log file of line-delimited JSON (LDJSON) to a node script that filters it and then writes the result to stdout. We'll use node.js' Transform stream to accomplish this.