Module 1

.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["@babel/preset-env", "@babel/preset-typescript"]
+}

.gitignore

@@ -1 +1,2 @@
-node_modules
+node_modules
+.vscode

.prettierrc.json

@@ -0,0 +1,6 @@
+{
+  "trailingComma": "all",
+  "tabWidth": 2,
+  "semi": true,
+  "singleQuote": false
+}

nodemon.json

@@ -0,0 +1,3 @@
+{
+  "ignore": ["*.json", "*.txt"]
+}

package.json

@@ -4,11 +4,27 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "task1": "nodemon --exec babel-node ./src/task1.ts --extensions .ts",
+    "task2": "nodemon --exec babel-node ./src/task2.ts --extensions .ts"
   },
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "nodemon": "^2.0.12"
+    "@types/event-stream": "^3.3.34",
+    "@types/node": "^16.10.1",
+    "csvtojson": "^2.0.10",
+    "event-stream": "^4.0.1",
+    "tslint": "^6.1.3",
+    "typescript": "^4.4.3"
+  },
+  "devDependencies": {
+    "@babel/cli": "^7.15.7",
+    "@babel/core": "^7.15.5",
+    "@babel/node": "^7.15.4",
+    "@babel/preset-env": "^7.15.6",
+    "@babel/preset-typescript": "^7.15.0",
+    "nodemon": "^2.0.13",
+    "prettier": "2.4.1"
   }
 }

src/csv/nodejs-hw1-ex1.csv

@@ -0,0 +1 @@
+Book,Author,Amount,PriceThe Compound Effect,Darren Hardy,5,9.48The 7 Habits of Highly Effective People,Stephen R. Covey,4,23.48The Miracle Morning,Hal Elrod,10,21.34Influence: The Psychology of Persuasion,Robert B. Cialdini,4,12.99The ONE Thing,Gary Keller,1,11.18

src/task1.ts

@@ -0,0 +1,7 @@
+import es from 'event-stream';
+
+// TASK 1
+process.stdin
+  .pipe(es.split())
+  .pipe(es.mapSync((data: string) => data.split('').reverse().join('').trim()))
+  .pipe(process.stdout);

src/task2.ts

@@ -0,0 +1,20 @@
+import csv from "csvtojson";
+import fs from "fs";
+import path from "path";
+import { pipeline } from "stream";
+
+const csvPath = path.join(__dirname, "./csv/nodejs-hw1-ex1.csv");
+const jsonPath = path.join(__dirname, "./csv/result.txt");
+
+pipeline(
+  fs.createReadStream(csvPath),
+  csv(),
+  fs.createWriteStream(jsonPath),
+  (err: any) => {
+    if (err) {
+      console.error("Pipeline failed.", err);
+    } else {
+      console.log("Pipeline succeeded.");
+    }
+  },
+);