Video 22

notes-app/app.js

@@ -21,7 +21,7 @@ yargs.command({
       type: 'string'
     }
   },
-  handler: function(argv) {
+  handler(argv) {
     notes.addNote(argv.title, argv.body);
   }
 });
@@ -37,7 +37,7 @@ yargs.command({
       type: 'string'
     }
   },
-  handler: function(argv) {
+  handler(argv) {
     notes.removeNote(argv.title);
   }
 });
@@ -46,7 +46,7 @@ yargs.command({
 yargs.command({
   command: 'list',
   describe: 'List notes',
-  handler: function() {
+  handler() {
     console.log('Listing out all notes');
   }
 });
@@ -55,7 +55,7 @@ yargs.command({
 yargs.command({
   command: 'read',
   describe: 'Read a note',
-  handler: function() {
+  handler() {
     console.log('Reading a note');
   }
 });

notes-app/notes.js

@@ -1,15 +1,13 @@
 const fs = require('fs');
 const chalk = require('chalk');
 
-const getNotes = function() {
+const getNotes = () => {
   return 'Your notes...'
 }
 
-const addNote = function(title, body) {
+const addNote = (title, body) => {
   const notes = loadNotes();
-  const duplicateNotes = notes.filter(function(note) {
-    return note.title === title;
-  });
+  const duplicateNotes = notes.filter((note) => note.title === title);
 
   if (duplicateNotes.length === 0) {
     notes.push({
@@ -24,11 +22,9 @@ const addNote = function(title, body) {
   }
 }
 
-const removeNote = function(title) {
+const removeNote = (title) => {
   const notes = loadNotes();
-  const notesToKeep = notes.filter(function(note) {
-    return note.title !== title;
-  });
+  const notesToKeep = notes.filter((note) => note.title !== title);
 
   if (notes.length > notesToKeep.length) {
     console.log(chalk.bgGreen.bold('Note removed!'));
@@ -38,12 +34,12 @@ const removeNote = function(title) {
   }
 }
 
-const saveNotes = function(notes) {
+const saveNotes = (notes) => {
   const dataJSON = JSON.stringify(notes);
   fs.writeFileSync('notes.json', dataJSON);
 }
 
-const loadNotes = function() {
+const loadNotes = () => {
   try {
     const dataBuffer = fs.readFileSync('notes.json');
     const dataJSON = dataBuffer.toString();

playground/3-arrow-function.js

@@ -0,0 +1,24 @@
+//
+// Goal: Create method to get incomplete tasks
+//
+// 1. Define getTasksToDo method
+// 2. Use filter to to return just the incompleted tasks (arrow function)
+// 3. Test your work by running the script
+
+const tasks = {
+    tasks: [{
+        text: 'Grocery shopping',
+        completed: true
+    },{
+        text: 'Clean yard',
+        completed: false
+    }, {
+        text: 'Film course',
+        completed: false
+    }],
+    getTasksToDo() {
+      return this.tasks.filter((task) => task.completed === false);
+    }
+}
+
+console.log(tasks.getTasksToDo())