Alexi bettinger/june 2024

01-week/1-day/scratch.js

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+//Conditionals
+
+// if (true) {
+//     console.log("Hello")
+// }   
+
+//Else if and else can only be chained onto an if statement
+
+// if (true) {
+
+// } else {
+
+// }
+
+//FUNction
+//Reusable blocks of code
+//You can put any valid code into them including conditionals, loops
+
+// function sayHi() {
+//     console.log("Hello")
+// }
+
+//To actually use the code inside of the function we have to call it
+
+//sayHi(); //This triggers the code to run
+
+//Parameters vs arguments 
+
+// function sayHelloTo(name) {
+//     console.log(`Hi, ${name}`);
+// }
+
+// sayHelloTo("King");
+// sayHelloTo("Brett");
+
+// function condish(name) {
+//     //We can put conditionals into functions
+//     if (name === "Marlon") {
+//         console.log("Yay!! Marlon");
+//     } else if (name === "Andres") {
+//         console.log("Yay!! Andres");
+//     } else {
+//         console.log("Who are you: ", name)
+//     }
+// }
+
+// condish("Marlon");
+// condish("Alex");
+
+//Mutable vs Immutable stuff
+
+//Some things in javascript can change, others cant
+
+//Things that can change: (mutable data types)
+// -Arrays
+// -Objects
+
+//Things that cant change: (immutable data types)
+// - Numbers
+// - Strings
+// - Booleans
+
+//Since variables are just boxes that hold stuff, we can tell a variable to hold a NEW string
+
+// let string = "King";
+
+// let upperString = string.toUpperCase();
+
+// string = string.toUpperCase();
+
+// console.log(upperString, string);
+
+//Arrays are mutable so we can change them
+
+let fruit = ["Apple", "Orange", "Peach", "Guava"];
+
+//console.log(fruit);
+
+fruit[1] = "Lemon";
+
+//console.log(fruit);
+
+//IMMUTABILITY EXAMPLE - 
+// let string = "Barnacle"
+// string[1] = 'L'
+
+// console.log(string)
+
+//console.log(["Apple", "Orange", "Peach", "Guava"][1])
+
+//Nested array - Arrays within arrays
+let arr = [true, false, [1, 2, 3]]
+
+//console.log(arr[2]) // [1, 2, 3]
+
+//console.log([1, 2, 3][1])
+
+//console.log(arr[2][1]) //Return 2
+
+let nestedFruit = ["Apple", "Peach", "Guava", ["Lemon", "Lime", "Orange"], "cherries", "Watermelon"];
+
+//console.log(nestedFruit[3][1]) //Lime
+
+// console.log(nestedFruit[0])
+// console.log(nestedFruit[3][0])
+
+//console.log(nestedFruit[0] + nestedFruit[1])
+
+nestedFruit[0] = true
+
+//console.log(nestedFruit);
+
+let citrusFruits = nestedFruit[3];
+
+//console.log(citrusFruits) // ["Lemon", "Lime", "Orange"]
+
+//console.log(citrusFruits[0]) // "Lemon"
+
+//let animals = ["Lion", "Otter", ["Bobcat", "Housecat", ["Tabby", "Orange", "Hemmingway", "russian blue"], "Cougar"], "Penguin"]
+
+//console.log(animals[2][2][3]) //Russian blue
+
+
+//Loops 
+
+let fruits = ["Apple", "Orange", "Peach", "Guava"];
+let veggies = ["Brocc", "lettuce", "Tomato", "cucumber"]
+
+//INSTEAD OF THIS
+// console.log(fruits[0]);
+// console.log(fruits[1]);
+// console.log(fruits[2]);
+// console.log(fruits[3]);
+
+// for (let i = 0; i < fruits.length; i++) {
+//     console.log(fruits[i])
+// }
+
+// function printsEverythingInArray(arr) {
+//     for (let i = 0; i < arr.length; i++) {
+//         console.log(arr[i])
+//     }
+// }
+
+// printsEverythingInArray(veggies)
+
+let nums = [1, 2, 3, 4, 5, 6, 7, 8, 9]
+
+function addNumsFromArray(arrOfNums) {
+    let sum = 0;
+    for (let i = 0; i < arrOfNums.length; i++) {
+        sum += arrOfNums[i]
+    }
+
+    return sum;
+}
+
+console.log(addNumsFromArray(nums))
+
+/*
+
+Every time we call a function it starts from scratch
+
+Every time we loop, the loop "starts from scratch"
+
+*/
+
+// let sum = 0
+// function randoFunc(num) {
+//     return sum += num;
+// }
+
+// console.log(randoFunc(5))
+// console.log(randoFunc(5))
+// console.log(randoFunc(5))
+
+
+//RETURN STATEMENTS ARE ONLY FOR FUNCTIONS
+
+function spitOutName(name, whisperOrYell) {
+    if (whisperOrYell === 'whisper') {
+        return name.toLowerCase()
+    } else if (whisperOrYell === 'yell') {
+        return name.toUpperCase()
+    }
+
+}
+
+console.log(spitOutName("King", 'yell'))

01-week/2-day/scratch.js

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+//Array methods
+//Methods are functions they're a just little different
+//Instead of just calling it funcName()
+
+//methods are called after something  string.toUpperCase()
+
+//Array methods are methods that called on arrays
+
+//push, pop, shift, unshift, splice, slice, split, and join
+
+let fruit = ["Apple", "Cherry", "Goji", "Mango", "Lemon", "Lime"];
+
+//PUSH - Arguably the most commonly used array method
+//Push adds an item(s) to the end of an array
+
+//Push returns the length of the array console.log(fruit.push("Cantaloupe", "Banana"))
+let newFruitlength = fruit.push("Cantaloupe", "Banana")
+//console.log(fruit)
+//console.log(newFruitlength)
+
+//POP - Removes the LAST item in an array and returns the item it removed
+
+let lastFruit = fruit.pop()
+//console.log(fruit)
+
+//console.log(lastFruit);
+
+let emptyArr = [];
+
+//console.log(emptyArr.pop()) //undefined
+
+//UNSHIFT - Adds items to the beginning of the array
+
+fruit.unshift("Strawbies");
+//console.log(fruit)
+
+//SHIFT - removes the FIRST item in an array
+
+let firstItem = fruit.shift();
+console.log(fruit)
+
+//console.log(firstItem)
+
+//SPLICE - Remove, replace, or add items to the original array
+fruit.splice(1, 1); // Remove cherry start at index 1 and remove 1 item
+
+fruit.splice(3, 0, "Peach", "Pear")
+
+fruit.splice(3, 2)
+
+console.log(fruit)
+//SLICE - We read mdn go look at it
+
+//Split and Join
+
+//Split is a STRING method
+//Split takes a string and splits it into baby strings based on a pattern and puts the baby strings
+//into an array
+
+//Most commonly used to iterate over a string
+
+let sentence = "The quick brown fox jumps over the lazy dog.";
+
+let stringArr = sentence.split(' ');
+
+for (let i = 0; i < stringArr.length; i++) {
+    console.log(stringArr[i])
+}
+
+//JOIN - concatenates an array
+
+console.log(stringArr.join('-'))

01-week/4-day/scratch.js

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+//Nested Loops
+
+let fruit = ["Apple", "Orange", "Lemon", "Lime", "Blueberry", "Cherry"];
+
+//Nested loop that console logs every unique pair of fruits
+
+//IMPORTANT - For every iteration of the outer loop, the inner loop must complete ALL
+// of its iterations
+
+for (let i = 0; i < fruit.length; i++) {
+    let fruit1 = fruit[i];
+
+    //Write an inner loop
+    for (let j = i + 1; j < fruit.length; j++) {
+        let fruit2 = fruit[j];
+        console.log(fruit1, fruit2)
+    }
+}
+

01-week/5-day/scratch.js

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+//Nested Arrays - Arrays within arrays
+
+let array = ["sheep", "cows", ["maincoon", "bombay", "tuxedo"], "fish"];
+
+//console.log(array[2][1]); //"bombay"
+
+let arr2 = [1, 2, 3, [4, 5, 6, [7, 8, 9]]];
+
+//console.log(arr2[3][3][1]); //8
+
+let listOfFruits = [["Orange", "Lemon", "Lime"], ["Strawbie", "Bluebie", "BlackBerrie"], ["watermelon", "canteloupe"]];
+
+//console.log(listOfFruits[1][0]) //Strawbie
+
+//Nested Loopies
+
+/*
+A loop within a loop
+
+For every ONE iteration of the outer loop, the inner loop must complete all iterations
+
+The inner loop must complete all iterations before the outer loop can loop again
+
+The INNER LOOP MUST STOP before the outer loop can run again
+*/
+
+// for (let i = 0; i < 5; i++) {
+//     console.log("OUTER LOOP ITERATION: ", i);
+
+//     for (let j = 45; j < 50; j++) {
+//         console.log("innerloop iteration: ", j)
+//     }
+
+// }
+
+// let sentence = "Crazy I was crazy once they locked me in a room a room with rats";
+
+// let wordsArr = sentence.split(' ');
+
+// for (let i = 0; i < wordsArr.length; i++) {
+//     let word = wordsArr[i];
+
+//     for (let j = 0; j < word.length; j++) {
+//         console.log(word[j]);
+//     }
+// }
+
+//Animal fightblub
+
+let animals = ["rat", "poyo", "tiger", "giraffe", "my husband", "creeper", "King"];
+
+//I want a list of animal fights, whos fighting who?
+//The outer loop is gonna grab an animal, the inner loop is gonna grab every animal after that one
+// console.log("FIGHT LIST: ")
+// for (let i = 0; i < animals.length; i++) {
+//     let animal1 = animals[i];
+
+//     for (let j = i + 1; j < animals.length; j++) {
+//         let animal2 = animals[j];
+
+//         console.log(animal1, animal2);
+//     }
+// }
+
+//There are a couple ways to declare functions
+//Function Expressions - when we set a variable equal to a function, and to call the function we call the variable name
+
+
+/*
+Regular func declaration
+function funcName() {
+    //Code inside func
+}
+funcName()
+
+
+Function expression:
+
+let funcName = function() {
+
+}
+funcName()
+*/
+
+//When using function expression syntax, the function is considered anonymous because it doesn't have a name
+// The only way to call it is to use the variable name that its inside of
+
+//FUNCTION EXPRESSION AND FUNCTION DECLARATIONS ARE THE SAME
+let sayHi = function(name) {
+    console.log(`Hi ${name}!`);
+}
+
+sayHi("Poyo");
+
+// function doMath(num1, num2) {
+//     return num1 + num2 ;
+// }
+
+
+sayHi = function(name) { //REASSIGNING IT TO A NEW FUNC
+    console.log(`Bye ${name}.`)
+} 
+
+sayHi("Rat")
+
+let fruit = "apple";
+fruit();