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js-callbacks-advanced-arrays/js-callbacks-advanced-arrays/README.md

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+
+# Javascript Callbacks and Advanced Arrays
+
+With some basic JavaScript principles in hand, we can now expand our skills out even further by exploring callback functions and array methods.  Finish each task in order as the concepts build on one another.
+
+## Set Up The Project With Git
+
+**Follow these steps to set up and work on your project:**
+
+* [ ] Create a forked copy of this project.
+* [ ] Add your group lead/instructor as collaborator on Github.
+* [ ] Clone your OWN version of the repository (Not Gabi's by mistake!).
+* [ ] Create a new branch: git checkout -b `<firstName-lastName>`.
+* [ ] Implement the project on your newly created `<firstName-lastName>` branch, committing changes regularly.
+* [ ] Push commits: git push origin `<firstName-lastName>`.
+
+**Follow these steps for completing your project.**
+
+* [ ] Submit a Pull-Request to merge <firstName-lastName> Branch into main (student's  Repo). **Please don't merge your own pull request**
+* [ ] Add your group lead as a reviewer on the pull-request
+* [ ] Your group lead will count the project as complete by merging the branch back into main.
+
+## Task 2: Higher Order Functions and Callbacks
+
+This task focuses on getting practice with higher order functions and callback functions by giving you an array of values and instructions on what to do with that array.
+
+* [ ] Review the contents of the [callbacks.js](callbacks.js) file.  Notice you are given an array at the top of the page.  Use that array to aid you with your functions.
+
+* [ ] Complete the problems provided to you but skip over stretch problems until you are complete with every other JS file first.
+
+## Task 3: Array Methods
+
+Use `.forEach()`, `.map()`, `.filter()`, and `.reduce()` to loop over an array with 50 objects in it. The [array-methods.js](array-methods.js) file contains several challenges built around a fundraising 5K fun run event.
+
+* [ ] Review the contents of the [array-methods.js](array-methods.js) file.  
+
+* [ ] Complete the problems provided to you but skip over stretch problems until you are complete with every other JS file first.
+
+* [ ] Notice the last three problems are up to you to create and solve.  This is an awesome opportunity for you to push your critical thinking about array methods, have fun with it.
+
+## Stretch Goals
+
+* [ ] Go back through the stretch problems that you skipped over and complete as many as you can.
+* [ ] Look up what an IIFE is in JavaScript and experiment with them

js-callbacks-advanced-arrays/js-callbacks-advanced-arrays/array-methods.js

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+// A local community center is holding a fund raising 5k fun run and has invited 50 small businesses to make a small donation on their behalf for some much needed updates to their facilities.  Each business has assigned a representative to attend the event along with a small donation.
+
+// Scroll to the bottom of the list to use some advanced array methods to help the event director gather some information from the businesses.
+
+const runners = [{"id":1,"first_name":"Charmain","last_name":"Seiler","email":"cseiler0@wired.com","shirt_size":"2XL","company_name":"Divanoodle","donation":75},
+{"id":2,"first_name":"Whitaker","last_name":"Ierland","email":"wierland1@angelfire.com","shirt_size":"2XL","company_name":"Wordtune","donation":148},
+{"id":3,"first_name":"Julieta","last_name":"McCloid","email":"jmccloid2@yahoo.com","shirt_size":"S","company_name":"Riffpedia","donation":171},
+{"id":4,"first_name":"Martynne","last_name":"Paye","email":"mpaye3@sciencedaily.com","shirt_size":"XL","company_name":"Wordware","donation":288},
+{"id":5,"first_name":"Gussy","last_name":"Raraty","email":"graraty4@ucoz.ru","shirt_size":"L","company_name":"Oozz","donation":291},
+{"id":6,"first_name":"Yule","last_name":"Tommasetti","email":"ytommasetti5@state.gov","shirt_size":"S","company_name":"Yodo","donation":27},
+{"id":7,"first_name":"Kathie","last_name":"Majury","email":"kmajury6@guardian.co.uk","shirt_size":"3XL","company_name":"Zoomcast","donation":261},
+{"id":8,"first_name":"Tanner","last_name":"Branton","email":"tbranton7@tmall.com","shirt_size":"2XL","company_name":"Realmix","donation":28},
+{"id":9,"first_name":"Sarina","last_name":"Lasham","email":"slasham8@toplist.cz","shirt_size":"XL","company_name":"Gigashots","donation":110},
+{"id":10,"first_name":"Bertie","last_name":"Lonergan","email":"blonergan9@issuu.com","shirt_size":"3XL","company_name":"Skinte","donation":62},
+{"id":11,"first_name":"Trevor","last_name":"Studd","email":"tstudda@networkadvertising.org","shirt_size":"S","company_name":"Cogidoo","donation":76},
+{"id":12,"first_name":"Malachi","last_name":"Okeshott","email":"mokeshottb@chron.com","shirt_size":"M","company_name":"DabZ","donation":91},
+{"id":13,"first_name":"Berget","last_name":"Logsdail","email":"blogsdailc@wix.com","shirt_size":"M","company_name":"Mymm","donation":9},
+{"id":14,"first_name":"Loise","last_name":"Rivlin","email":"lrivlind@behance.net","shirt_size":"2XL","company_name":"Linktype","donation":204},
+{"id":15,"first_name":"Christan","last_name":"Kendall","email":"ckendalle@example.com","shirt_size":"XS","company_name":"Skinix","donation":252},
+{"id":16,"first_name":"Kayla","last_name":"Whitwam","email":"kwhitwamf@deliciousdays.com","shirt_size":"2XL","company_name":"Oyope","donation":147},
+{"id":17,"first_name":"Heddie","last_name":"Heningam","email":"hheningamg@tripadvisor.com","shirt_size":"L","company_name":"Skinix","donation":172},
+{"id":18,"first_name":"Mace","last_name":"Ballinger","email":"mballingerh@a8.net","shirt_size":"S","company_name":"Nlounge","donation":266},
+{"id":19,"first_name":"Nola","last_name":"Abberley","email":"nabberleyi@jalbum.net","shirt_size":"XL","company_name":"Photospace","donation":148},
+{"id":20,"first_name":"Nadine","last_name":"Tresler","email":"ntreslerj@marketwatch.com","shirt_size":"3XL","company_name":"Wikido","donation":292},
+{"id":21,"first_name":"Ulrikaumeko","last_name":"Vuittet","email":"uvuittetk@gov.uk","shirt_size":"S","company_name":"Skinte","donation":102},
+{"id":22,"first_name":"Saunder","last_name":"Spennock","email":"sspennockl@icq.com","shirt_size":"3XL","company_name":"Kwimbee","donation":213},
+{"id":23,"first_name":"Carmel","last_name":"Woffinden","email":"cwoffindenm@wikispaces.com","shirt_size":"S","company_name":"Rooxo","donation":137},
+{"id":24,"first_name":"Marielle","last_name":"Kimmel","email":"mkimmeln@jimdo.com","shirt_size":"M","company_name":"Livetube","donation":96},
+{"id":25,"first_name":"Brucie","last_name":"Burris","email":"bburriso@slate.com","shirt_size":"2XL","company_name":"Wordtune","donation":128},
+{"id":26,"first_name":"Juan","last_name":"Berzon","email":"jberzonp@soup.io","shirt_size":"3XL","company_name":"Einti","donation":234},
+{"id":27,"first_name":"Sacha","last_name":"Olsen","email":"solsenq@reverbnation.com","shirt_size":"2XL","company_name":"Viva","donation":190},
+{"id":28,"first_name":"Jamey","last_name":"O'Nolan","email":"jonolanr@samsung.com","shirt_size":"XL","company_name":"Skinix","donation":31},
+{"id":29,"first_name":"Morrie","last_name":"Rainard","email":"mrainards@yale.edu","shirt_size":"XS","company_name":"Podcat","donation":52},
+{"id":30,"first_name":"Fidel","last_name":"Roskelly","email":"froskellyt@ibm.com","shirt_size":"XS","company_name":"Avavee","donation":5},
+{"id":31,"first_name":"Toni","last_name":"MacSweeney","email":"tmacsweeneyu@parallels.com","shirt_size":"M","company_name":"Jaloo","donation":82},
+{"id":32,"first_name":"Jessey","last_name":"Walhedd","email":"jwalheddv@slashdot.org","shirt_size":"L","company_name":"Trilia","donation":5},
+{"id":33,"first_name":"Karola","last_name":"Piper","email":"kpiperw@ucsd.edu","shirt_size":"3XL","company_name":"Yombu","donation":110},
+{"id":34,"first_name":"Marley","last_name":"Mitchenson","email":"mmitchensonx@webeden.co.uk","shirt_size":"M","company_name":"Zoonoodle","donation":97},
+{"id":35,"first_name":"Marrilee","last_name":"Thrasher","email":"mthrashery@opensource.org","shirt_size":"XL","company_name":"Bluejam","donation":17},
+{"id":36,"first_name":"Tye","last_name":"Manie","email":"tmaniez@netscape.com","shirt_size":"L","company_name":"Kanoodle","donation":30},
+{"id":37,"first_name":"Charleen","last_name":"Sheering","email":"csheering10@mit.edu","shirt_size":"3XL","company_name":"Jatri","donation":262},
+{"id":38,"first_name":"Valma","last_name":"Eynaud","email":"veynaud11@archive.org","shirt_size":"XS","company_name":"Jaxbean","donation":212},
+{"id":39,"first_name":"Dollie","last_name":"McDarmid","email":"dmcdarmid12@tinyurl.com","shirt_size":"S","company_name":"Kayveo","donation":74},
+{"id":40,"first_name":"Minna","last_name":"Hymas","email":"mhymas13@cornell.edu","shirt_size":"XS","company_name":"Vimbo","donation":101},
+{"id":41,"first_name":"Jsandye","last_name":"Frend","email":"jfrend14@ca.gov","shirt_size":"XS","company_name":"Latz","donation":156},
+{"id":42,"first_name":"Yevette","last_name":"Hacket","email":"yhacket15@wp.com","shirt_size":"XL","company_name":"Lazzy","donation":291},
+{"id":43,"first_name":"Hank","last_name":"Zebedee","email":"hzebedee16@ezinearticles.com","shirt_size":"L","company_name":"Gigashots","donation":241},
+{"id":44,"first_name":"Jodie","last_name":"Stawell","email":"jstawell17@yale.edu","shirt_size":"S","company_name":"Jaxspan","donation":262},
+{"id":45,"first_name":"Falito","last_name":"Karsh","email":"fkarsh18@pcworld.com","shirt_size":"S","company_name":"Mycat","donation":239},
+{"id":46,"first_name":"Reginauld","last_name":"Purselowe","email":"rpurselowe19@thetimes.co.uk","shirt_size":"L","company_name":"Jabbersphere","donation":11},
+{"id":47,"first_name":"Vida","last_name":"Tydd","email":"vtydd1a@dropbox.com","shirt_size":"S","company_name":"Quaxo","donation":55},
+{"id":48,"first_name":"Anderea","last_name":"MacGiolla Pheadair","email":"amacgiollapheadair1b@xing.com","shirt_size":"2XL","company_name":"Kwimbee","donation":214},
+{"id":49,"first_name":"Bel","last_name":"Alway","email":"balway1c@ow.ly","shirt_size":"S","company_name":"Voolia","donation":107},
+{"id":50,"first_name":"Shell","last_name":"Baine","email":"sbaine1d@intel.com","shirt_size":"M","company_name":"Gabtype","donation":171}];
+
+// ==== Challenge 1: Use .forEach() ====
+// The event director needs both the first and last names of each runner for their running bibs.  Combine both the first and last names into a new array called fullName. 
+let fullName = [];
+
+runners.forEach((runner) => {
+    fullName.push(`${runner.first_name} ${runner.last_name}`)
+})
+
+console.log(fullName);
+
+// ==== Challenge 2: Use .map() ====
+// The event director needs to have all the runner's first names converted to uppercase because the director BECAME DRUNK WITH POWER. Convert each first name into all caps and log the result
+let allCaps = runners.map(runner => runner.first_name.toUpperCase())
+
+console.log(allCaps); 
+
+// ==== Challenge 3: Use .filter() ====
+// The large shirts won't be available for the event due to an ordering issue.  Get a list of runners with large sized shirts so they can choose a different size. Return an array named largeShirts that contains information about the runners that have a shirt size of L and log the result
+
+
+let largeShirts = runners.filter(runner => runner.shirt_size === 'L')
+
+console.log(largeShirts);
+
+// ==== Challenge 4: Use .reduce() ====
+
+// The donations need to be tallied up and reported for tax purposes. Add up all the donations into a ticketPriceTotal array and log the result
+
+let ticketPriceTotal = runners.reduce((total, runner) => {
+   return total + runner.donation
+}, 0)
+
+console.log(ticketPriceTotal);
+
+// ==== Challenge 5: Be Creative ====
+// Now that you have used .forEach(), .map(), .filter(), and .reduce().  I want you to think of potential problems you could solve given the data set and the 5k fun run theme.  Try to create and then solve 3 unique problems using one or many of the array methods listed above.
+
+// Problem 1
+
+// Problem 2
+
+// Problem 3

js-callbacks-advanced-arrays/js-callbacks-advanced-arrays/callbacks.js

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+// Create a higher order function and invoke the callback function to test your work. You have been provided an example of a problem and a solution to see how this works with our items array.  Study both the problem and the solution to figure out the rest of the problems.
+
+const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
+
+/* 
+  //Given this problem: 
+
+  function firstItem(arr, cb) {
+    // firstItem passes the first item of the given array to the callback function.
+  }
+  // Potential Solution:
+  // Higher order function using "cb" as the call back
+  function firstItem(arr, cb) {
+    return cb(arr[0]);
+  }
+  // Function invocation 
+  firstItem(items, function(first) {
+    console.log(first)
+  });
+*/
+
+
+function getLength(arr, cb) {
+  // getLength passes the length of the array into the callback.
+  return cb(arr.length)
+}
+
+function size(length) {
+  console.log(length)
+}
+// invocation
+getLength(items, size)
+
+function last(arr, cb) {
+  // last passes the last item of the array into the callback.
+  return cb(arr[arr.length - 1])
+}
+
+function lastItem(item) {
+  console.log(item)
+}
+
+// Invoke
+last(items, lastItem)
+
+function sumNums(x, y, cb) {
+  // sumNums adds two numbers (x, y) and passes the result to the callback.
+  return cb(x + y)
+}
+
+function addNums(result) {
+  console.log(result)
+}
+
+// invoke
+sumNums(3, 6, addNums)
+
+function multiplyNums(x, y, cb) {
+  // multiplyNums multiplies two numbers and passes the result to the callback.
+  return cb(x * y)
+}
+
+function multiply(result) {
+  console.log(result)
+}
+
+// invoke
+multiplyNums(6, 7, multiply)
+
+
+// HIGHER ORDER FUNCTION (HOF)
+function contains(item, list, cb) {
+  // contains checks if an item is present inside of the given array/list.
+  // Pass true to the callback if it is, otherwise pass false.
+  return cb(list.includes(item))
+}
+
+function check(isPresent) {
+  console.log(isPresent)
+}
+
+// Invoke
+contains('Notebook', items, check)
+
+/* STRETCH PROBLEM */
+
+function removeDuplicates(array, cb) {
+  // removeDuplicates removes all duplicate values from the given array.
+  // Pass the duplicate free array to the callback function.
+  // Do not mutate the original array.
+}

js-callbacks-advanced-arrays/js-callbacks-advanced-arrays/index.html

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+<!doctype html>
+
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+  <title>Callbacks and Advanced Arrays</title>
+
+  <script src="array-methods.js"></script> 
+  <script src="callbacks.js"></script>
+</head>
+
+<body>
+<h1>Callbacks and Advanced Arrays - Check your work in the console!</h1>
+</body>
+</html>