Chapter 2: edits

Chapter02/working-with-files/readWriteAsync.js

@@ -9,8 +9,7 @@ fs.readFile(filepath, "utf8", function (err, contents) {
   }
   console.log("File Contents:", contents);
   const upperContents = contents.toUpperCase();
-  fs.writeFile(filepath, upperContents, function (err) {
-    if (err) throw err;
-    console.log("File updated.");
-  });
+
+  fs.writeFileSync(filepath, upperContents);
+  console.log("File updated.");
 });

Chapter02/working-with-files/readWriteAsync2.js

@@ -9,14 +9,9 @@ fs.readFile(filepath, "utf8", function (err, contents) {
   }
   console.log("File Contents:", contents);
   const upperContents = contents.toUpperCase();
-  setTimeout(() => updateFile(filepath, upperContents), 10);
-});
 
-function updateFile(filepath, contents) {
-  fs.writeFile(filepath, contents, function (err) {
+  fs.writeFile(filepath, upperContents, function (err) {
     if (err) throw err;
     console.log("File updated.");
   });
-}
-
-setInterval(() => process.stdout.write("**** \n"), 1).unref();
+});

Chapter02/working-with-files/readWriteAsyncNamed.js

@@ -0,0 +1,21 @@
+const fs = require("fs");
+const path = require("path");
+
+const filepath = path.join(process.cwd(), "hello.txt");
+
+fs.readFile(filepath, "utf8", function (err, contents) {
+  if (err) {
+    return console.log(err);
+  }
+  console.log("File Contents:", contents);
+
+  const upperContents = contents.toUpperCase();
+  updateFile(filepath, upperContents);
+});
+
+function updateFile(filepath, contents) {
+  fs.writeFile(filepath, contents, function (err) {
+    if (err) throw err;
+    console.log("File updated.");
+  });
+}

Chapter02/working-with-files/readWriteAsyncTimeout.js

@@ -0,0 +1,23 @@
+const fs = require("fs");
+const path = require("path");
+
+const filepath = path.join(process.cwd(), "hello.txt");
+
+fs.readFile(filepath, "utf8", function (err, contents) {
+  if (err) {
+    return console.log(err);
+  }
+  console.log("File Contents:", contents);
+  const upperContents = contents.toUpperCase();
+
+  setTimeout(() => updateFile(filepath, upperContents), 10);
+});
+
+function updateFile(filepath, contents) {
+  fs.writeFile(filepath, contents, function (err) {
+    if (err) throw err;
+    console.log("File updated.");
+  });
+}
+
+setInterval(() => process.stdout.write("**** \n"), 1).unref();

Chapter02/working-with-files/readWriteSync.js

@@ -7,5 +7,6 @@ const contents = fs.readFileSync(filepath, "utf8");
 console.log("File Contents:", contents);
 
 const upperContents = contents.toUpperCase();
+
 fs.writeFileSync(filepath, upperContents);
 console.log("File updated.");