Week3

01-node-tutorial/.gitignore

@@ -1,2 +1,4 @@
 /node_modules
-/content/big.txt
+/content/big.txt
+answers/temporary/*
+!answers/temporary/.keep

01-node-tutorial/answers/.gitignore

@@ -0,0 +1,2 @@
+/node_modules
+.DS_Store

01-node-tutorial/answers/01-intro.js

@@ -0,0 +1 @@
+console.log("Hello from Risqua!") 

01-node-tutorial/answers/02-globals.js

@@ -0,0 +1,6 @@
+console.log("Current directory (__dirname):", __dirname);
+console.log("MY_VAR environment variable:", process.env.MY_VAR);
+
+console.log("Current filename (__filename):", __filename);
+console.log("Node.js version (process.version):", process.version);
+console.log("Platform (process.platform):", process.platform);

01-node-tutorial/answers/03-modules.js

@@ -0,0 +1,12 @@
+const names = require("./04-names.js");
+const sayHi = require("./05-utils.js");
+const altData = require("./06-alternative-flavor.js");
+require("./07-mind-grenade.js");
+
+sayHi("Susan");
+sayHi(names.john);
+sayHi(names.peter);
+
+console.log(altData);
+console.log("This is the main module running!");
+console.log(altData.item);

01-node-tutorial/answers/04-names.js

@@ -0,0 +1,4 @@
+const john = "John";
+const peter = "Peter";
+
+module.exports = { john, peter };

01-node-tutorial/answers/05-utils.js

@@ -0,0 +1,5 @@
+const sayHi = (name) => {
+  console.log(`Hello there, ${name}`);
+};
+
+module.exports = sayHi;

01-node-tutorial/answers/06-alternative-flavor.js

@@ -0,0 +1,4 @@
+module.exports.item = ["item1", "item2"];
+module.exports.person = {
+  name: "Bob",
+};

01-node-tutorial/answers/07-mind-grenade.js

@@ -0,0 +1,8 @@
+const num1 = 5;
+const num2 = 10;
+
+function addValues() {
+  console.log(`The sum is: ${num1 + num2}`);
+}
+
+addValues();

01-node-tutorial/answers/16-streams.js

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+const { createReadStream } = require("fs");
+const path = require("path");
+
+const stream = createReadStream(path.join(__dirname, "../content/big.txt"), {
+  encoding: "utf8",
+  highWaterMark: 200,
+});
+
+let chunkCount = 0;
+
+stream.on("data", (chunk) => {
+  chunkCount++;
+  console.log(`Chunk ${chunkCount}:\n`, chunk);
+});
+
+stream.on("end", () => {
+  console.log(`Finished. Total chunks: ${chunkCount}`);
+});
+
+stream.on("error", (err) => {
+  console.log("Stream error: ", err);
+});

01-node-tutorial/answers/content/first.txt

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+Hello this is first text file

01-node-tutorial/answers/content/second.txt

@@ -0,0 +1 @@
+Hello this is second text file

01-node-tutorial/answers/content/subfolder/test.txt

@@ -0,0 +1 @@
+test txt

01-node-tutorial/answers/customEmitter.js

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+const EventEmitter = require("events");
+const emitter = new EventEmitter();
+setInterval(() => {
+  emitter.emit("timer", "hi there");
+}, 2000);
+emitter.on("timer", (msg) => console.log(msg));
+
+/****
+ * Or, you could make an async function that waits on an event:
+
+const EventEmitter = require("events");  
+const emitter = new EventEmitter();  
+const waitForEvent = () => {  
+  return new Promise((resolve) => {  
+    emitter.on("happens", (msg) => resolve(msg));  
+  });  
+};  
+const doWait = async () => {  
+  const msg = await waitForEvent();  
+  console.log("We got an event! Here it is: ", msg);  
+};  
+doWait();  
+emitter.emit("happens", "Hello World!");  
+ * */