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Day 12: Functions are executables that wrap code so that it can be re-used and triggered at some other point. Look at these: - Parameters and Arguments - Function declarative vs function expression - Hoisting - Arrow functions - return #100daysofcode #javascript

Day 15: Scope is a well-defined set of rules for storing variables in some location, and for finding those variables at a later time. Learn how to declare variables with let and const. Also do research on local and global scopes. #Day15 #dev30 #100daysofcode #javascript

Day 16: In programming, data structures help us create relationships between data types. Learn: What data structures are? Motivation: Do not be afraid to break it Listen: open.spotify.com/episode/0vxZFY… #Day16 #dev30 #100daysofcode #100daysofcodechallenge #javascript

Day 17: Arrays -> Use arrays when you want information to be in a certain order. Learn: How to access and add items in an array. #Day17 #dev30 #100daysofcode #100daysofcodechallenge #javascript

Day 18: Array var family = ['Sarah', 'Aaron', 'Isaiah', 'Jeremiah', 'Maayan']; Accessing array item example console.log(family[0]); Adding items in an array var familyLength = family.length; family[familyLength] = 'James'; // OR family.push('James'); #dev30 #100daysofcode

Day 19: Array example continuation Replacing array item var groceries = ['Romaine Lettuce', 'Bread', 'Eggs', 'Cheese', 'Milk']; groceries[0] = 'Kale'; groceries[1] = 'Bagels'; console.log(groceries) #Day19 #dev30 #100daysofcode #100daysofcodechallenge #javascript

Without loops, we'd be writing the same code over and over. Into to loops: var menu = ['cheeseburger', 'fries', 'salad']; console.log(menu[0]); console.log(menu[1]); For loops for (let count = 0; count < 10; count++) { console.log(count); } #Day23 #100daysofcode

Day 24: - Using a Nested For Loop to Loop Through a Nested (2D) Array. Example: var cookieJar1 = ['cookie 1 jar 1', 'cookie 2 jar 1', 'cookie 3 jar 1']; var cookieJar2 = ['cookie 1 jar 2', 'cookie 2 jar 2', 'cookie 3 jar 2']; var neighbors = [cookieJar1, cookieJar2]; #dev30

Day 25: Array methods forEach -> Use when you want to perform an operation on every element in an array. var numbers = [1, 2, 3, 4, 5]; numbers.forEach(function (number) { console.log(number); }); Learn:- - map method - find method #dev30 #100daysofcode #javascript

Day 26: Array methods 1. filter -> Use when you want to create a new array that is a subset of the original array and can be created by interrogating each element in the array. 2. reduce -> Use when you want a single value that is an accumulation of information in an array.

Day 30: Objects - are key/value pairs 1. You can access values of an object's properties using either dot notion or bracket notion. 2. You can set props on an object using dot notation or bracket notation. #Day30 #dev30 #100daysofcode #100daysofcodechallenge #javascript

I just earned a Certificate on edX! Check it out: courses.edx.org/certificates/1… Thank you MIT ReACT

Merry Christmas! I hope you receive one blessing after another this coming year. #merrychristmas #merrychristmas2022 #happynewyear #happynewyear2022

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