Using async/await with Node.js Streams - Encountering Unexpected Behavior
I'm prototyping a solution and I'm learning this framework and I'm trying to process a large CSV file using Node.js streams along with async/await to handle asynchronous operations, but I'm running into unexpected behavior..... I expect to read the file, process each line, and push the results into an array. However, the results array ends up being empty when I try to log it after the stream ends. Here's what my code looks like: ```javascript const fs = require('fs'); const readline = require('readline'); async function processCSV(filePath) { const fileStream = fs.createReadStream(filePath); const rl = readline.createInterface({ input: fileStream, crlfDelay: Infinity }); const results = []; for await (const line of rl) { const processedLine = await processLine(line); results.push(processedLine); } console.log('Results:', results); } async function processLine(line) { // Simulating an asynchronous operation return new Promise((resolve) => { setTimeout(() => resolve(line.toUpperCase()), 100); }); } processCSV('path/to/your/file.csv'); ``` When I run this code, the console logs 'Results: []' even though I can see the file is being read and processed. I suspect this might have to do with how the event loop handles asynchronous operations with streams. I've tried moving the `console.log()` statement inside the loop to see if the array gets populated, and it does show the results correctly, but I need the complete results array after processing all lines. Any insights on what's going wrong here? This is part of a larger REST API I'm building. I'm coming from a different tech stack and learning Javascript.