First commit

Author: Max Kelly

Diff for: .vscode/settings.json

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+{
+    "cSpell.words": [
+        "existng",
+        "todos"
+    ]
+}

Diff for: advanced/arrow-function.js

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+// The below is another way to perform a function. Its meant to be clean for one line uses 
+const square = (num) => num * num
+console.log(square(5))
+
+const people = [{
+    name: 'Max',
+    age: 21
+}, {
+    name: 'Andrew',
+    age: 27
+}, {
+    name: 'John',
+    age: 143
+}]
+
+const under30 = people.filter((person) => person.age < 30)
+console.log(under30)
+
+const whose21 = people.find((person) => person.age === 21)
+console.log(whose21.name)

Diff for: advanced/arrow-function2.js

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+
+// Arguments only exist in regular functions 
+const add = function(a, b) {
+    return arguments [0] + arguments[1]
+}
+
+console.log(add(11, 22, 33, 44))
+
+// You shouldn't also use an arrow function in the below method 
+const car = {
+    color: 'Red',
+    getSummary: function () {
+        return `The car is ${this.color}`
+    }
+}
+
+console.log(car.getSummary())

Diff for: advanced/conditional-operator.js

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+const myAge = 2
+const message = myAge >= 18 ? 'You can vote!' : 'You cannot vote.'; // This is a more compact and easier way instead of doing the below if statement
+
+// if (myAge >= 18) {
+//     message = 'You can vote!'
+// } else {
+//     message = 'You cannot vote'
+// }
+
+console.log(message)
+
+// ----- 
+// Conditional operator using functions 
+const myDrinkingAge = 20 
+
+const showPage = () => {
+    console.log('Showing the page')
+}
+
+const showErrorPage = () => {
+    console.log('Showing the error page')
+}
+
+myDrinkingAge >= 21 ? showPage() : showErrorPage()
+
+// Challenge 
+
+// 1. Print "team size: if less than or equal to 4"
+// 2. Print "Too many people on your team"
+
+const team = ["Tyler", "John", "John", "John"];
+const teamCount = team.length  <= 3 ? `Your team size is: ${team.length}` : 'Too many people on your team'
+
+console.log(teamCount)
+
+

Diff for: advanced/truthy-falsy.js

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+const products = [{name: 'Computer'}]
+const product = products[0]
+
+// Truthy - Values that resolve to true in a boolean context 
+// Falsy - Values that resolve to false in boolean context 
+
+// Falsy Values are - false, 0, empty string, null, undefined, NAN
+// Truthy values are - anything else
+
+if (product) {
+    console.log('Product found')
+} else {
+    console.log('Product not found')
+}

Diff for: advanced/try-catch.js

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+// The below catches errors that can occur in the site. 
+
+
+const getTip = (amount) => {
+    if (typeof amount === 'number') { // The typeof says this input must be a number. 
+        return amount * 0.25
+    } else {
+        throw Error('Argument must be a number') // If its not a number return this error message.
+    }
+}
+
+//  True runs the code and if an error occurs it runs the error message above.
+
+try {
+    const result = getTip(true);
+    console.log(result);
+} catch (e) {
+    console.log(e.message)
+}

Diff for: advanced/type-coercion.js

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+// Type Coercion - a string, a number, a boolean - Should avoid doing this.  
+
+console.log('5' + 5) // Number version 
+console.log('5' - 5) // Number version
+console.log('5' == 5) // Double == mean that it doesn't take in the string number it sees it as a 5. You should always look at using ===.
+
+// const type = typeof 'Hello' // Type of basically tells you the type of telling you if its a 'number', 'string' etc...
+
+const value = true + 12 
+const type = typeof value 
+console.log(value)
+console.log(type)

Diff for: arrays/expense-tracker.js

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+const account = {
+    name: 'Max Kelly',
+    expenses: [],
+    income: [],
+    balance: [],
+
+    addExpense: function(description, amount) {
+        this.expenses.unshift({
+            description: description,
+            amount: amount
+        })
+    },
+
+    addIncome: function(description, amount) {
+        this.income.unshift({
+            description: description,
+            amount: amount
+        })
+    },
+
+    getAccountSummary: function() {
+        let totalExpenses = 0 
+        let totalIncome = 0
+        let balance = 0
+
+        this.expenses.forEach(function(item){
+            totalExpenses = totalExpenses + item.amount
+        })
+
+        this.income.forEach(function(item){
+            totalIncome = totalIncome + item.amount
+        })
+
+        balance = totalIncome - totalExpenses
+        return `${account.name} has a total of $${totalExpenses} and earns a total of $${totalIncome} making his balance: $${balance} `
+    },
+    
+};
+
+// Expense -> description, amount
+// addExpense -> This will take two arguments 1. Description 2. Amount 
+// getAccountSummary - This function will total up all the expenses -> "Max Kelly has ${total} in expenses"
+
+
+account.addExpense('Rent', 900);
+account.addExpense('Food', 400);
+account.addIncome('Job', 3000);
+account.addIncome('Sale', 200);
+console.log(account.getAccountSummary())

Diff for: arrays/notes.js

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+// const notes = [
+//     'Max',
+//     'Kelly'
+// ];
+
+// notes.push('My new note'); // This adds a value onto the array
+// console.log(notes);
+
+// notes.pop(notes); // This removes the last item on the array
+// console.log(notes);
+
+// notes.shift(); // This removes the first item on the array
+// console.log(notes);
+
+// notes.unshift('My first note'); // This adds a note onto the start of the array.
+// console.log(notes);
+
+// console.log(notes[0].length); // Puts the length of the array.
+
+//notes.splice(1, 1);
+    // This works as a way to remove selected items
+    // So it would say start at the 1st item and then remove the 1st item. 
+    // So it's notes.splice(start at, remove)
+//console.log(notes);
+
+// notes.splice(1, 0, 'This is the new note' ) // This allows us to add a value in the position.
+// console.log(notes);
+
+// notes[2] = 'This is now the new note 3';
+
+// // The below function performs for every object in the array.
+// // item lists the actual item in the array
+// notes.forEach(function (item, index) {
+//     console.log(index)
+//     console.log(item)
+// });
+
+// for (let count = 2; count >= 0; count--) {
+//     console.log(count)
+// }
+
+// for (let count = notes.length - 1; count >= 0; count--) {
+//    console.log(notes[count])
+// }
+
+//console.log(notes.indexOf({})); // This searches for the item in the array and returns he position back. If there isn't an object matching then it will return -1
+
+
+//--------------------
+
+const notes = [
+  {
+    title: "ay next trip",
+    body: " I would like to go to Spain"
+  },
+  {
+    title: "Habits to work on",
+    body: " Exercise. Eating a bit better"
+  },
+  {
+    title: "Office modifications",
+    body: "Max Kelly"
+  }
+];
+
+const findNote = function (notes, noteTitle) {
+    return notes.find(function(note, index){
+        return note.title.toLowerCase() === noteTitle.toLowerCase()
+    })
+};
+
+// The below allows the user to search for an object
+const findNotes = function (notes, query) {
+    return notes.filter(function (note, index) {
+        const isTitleMatch = note.title.toLowerCase().includes(query.toLowerCase())
+        const isBodyMatch = note.body.toLowerCase().includes(query.toLowerCase())
+        return isTitleMatch || isBodyMatch;
+    })
+}
+//----------------
+
+// Sorting the array 
+
+const sortNotes = function (notes) {
+    notes.sort(function (a, b) {
+        if (a.title.toLowerCase() < b.title.toLowerCase()) {
+            return -1 
+        } else if (b.title.toLowerCase() < a.title.toLowerCase()) {
+            return 1
+        } else {
+            return 0
+        } 
+    })
+};
+
+sortNotes(notes);
+console.log(notes);
+//-------------------
+
+// The below calls the function findNotes and searches the ''
+//console.log(findNotes(notes, 'work'));
+// const findNote = function(notes, noteTitle) {
+//   const index = notes.findIndex(function(note, index) {
+//     return note.title.toLowerCase() === noteTitle.toLowerCase();
+//   });
+//   return notes[index];
+// };
+
+// const note = findNote(notes, 'office modifications')
+// console.log(note);
+
+// const index = notes.findIndex(function (note, index) {
+//     return note.title === 'Habits to work on'
+// });
+
+// console.log(index);
+
+
+
+