From 5dc8a31867ef3dbbcfa906d4a240c13f01448a50 Mon Sep 17 00:00:00 2001 From: sagardesai90 Date: Tue, 17 Apr 2018 15:11:59 -0700 Subject: [PATCH 1/3] finished array-methods --- assignments/array-methods.js | 56 ++++++++++++++++++++++++++++++++---- 1 file changed, 51 insertions(+), 5 deletions(-) diff --git a/assignments/array-methods.js b/assignments/array-methods.js index f986e1ad8..2abbbceca 100644 --- a/assignments/array-methods.js +++ b/assignments/array-methods.js @@ -56,28 +56,74 @@ const runners = [{"id":1,"first_name":"Charmain","last_name":"Seiler","email":"c // ==== 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 = []; +//console.log(fullName); +runners.forEach(function(element) { + fullName.push(element.first_name + " " + element.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 = []; +// console.log(allCaps); +// fullName.forEach(function(element){ +// allCaps.push(element.toUpperCase()); +// }) +allCaps = fullName.map(el => el.toUpperCase()); console.log(allCaps); -// ==== Challenge 3: Use .filter() ==== +// ==== 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.forEach(function(element){ +// largeShirts.push() +// }) +largeShirts = runners.filter(el => el.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 = []; -console.log(ticketPriceTotal); +ticketArr = runners.map(el => el.donation) +console.log(ticketArr); +ticketPriceTotal = (accumulator, current) => accumulator + current; +console.log(ticketArr.reduce(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 solve 3 unique problems using one or many of the array methods listed above. -// Problem 1 +// Problem 1: Show a list of all the companies being represented by the runners. +let corpList = []; +corpList = runners.map(el => el.company_name); +console.log("#1"); +console.log(corpList.sort()); -// Problem 2 +// Problem 2: Break down donations into categories: 0-100, 100-200, etc. +let donorLevels = {"bronze": 0, "silver": 0,"gold": 0, "platinum": 0}; +runners.forEach(function(el){ + if (el.donation <= 100){ + donorLevels["bronze"] += 1; + } else if (el.donation <= 200 && el.donation > 100){ + donorLevels["silver"] += 1; + } else if (el.donation <= 300 && el.donation > 200){ + donorLevels["gold"] += 1; + } else if (el.donation > 300){ + donorLevels["platinum"] += 1; + } +}) +console.log(donorLevels); -// Problem 3 \ No newline at end of file +// Problem 3: Any duplicated first names? +let nameBadgeDuplicates = []; +let nameCounts = {}; +let firstNames = runners.map(el => el.first_name); +console.log(firstNames); +firstNames.forEach(function(el){ + console.log(el); + if (nameCounts[el] != true){ + nameCounts[el] = 1; + } else if (nameCounts[el] == true){ + nameCounts[el] += 1; + } +}) +console.log(nameCounts); \ No newline at end of file From 3413b4da578b22f7f0195ce9b142235cf024a2fb Mon Sep 17 00:00:00 2001 From: sagardesai90 Date: Tue, 17 Apr 2018 15:48:30 -0700 Subject: [PATCH 2/3] finished function conversions --- assignments/function-conversion.js | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/assignments/function-conversion.js b/assignments/function-conversion.js index 2c0965ec2..a169fde17 100644 --- a/assignments/function-conversion.js +++ b/assignments/function-conversion.js @@ -1,23 +1,29 @@ // Take the commented ES5 syntax and convert it to ES6 arrow Syntax // let myFunction = function () {}; +let myFunction = ((el) => (el)); // let anotherFunction = function (param) { // return param; // }; - + let anotherFunction = ((param) => param); + console.log(anotherFunction("hello")); // let add = function (param1, param2) { // return param1 + param2; // }; -// add(1,2); + let add = ((param1, param2) => param1 + param2); + console.log(add(1,2)); // let subtract = function (param1, param2) { // return param1 + param2; // }; -// subtract(1,2); + let subtract = ((param1, param2) => param1 - param2); + console.log(subtract(1,2)); exampleArray = [1,2,3,4]; + // const triple = exampleArray.map(function (num) { // return num * 3; // }); -// console.log(triple); \ No newline at end of file +const triple = exampleArray.map(num => num * 3); +console.log(triple); \ No newline at end of file From b6d6f2e943387b58b640686ea2bf18733097c46c Mon Sep 17 00:00:00 2001 From: sagardesai90 Date: Tue, 17 Apr 2018 16:57:55 -0700 Subject: [PATCH 3/3] closure.js --- assignments/closure.js | 32 ++++++++++++++++++++++++++++---- 1 file changed, 28 insertions(+), 4 deletions(-) diff --git a/assignments/closure.js b/assignments/closure.js index 4037b64c9..f15e5d8c6 100644 --- a/assignments/closure.js +++ b/assignments/closure.js @@ -1,19 +1,43 @@ // ==== Challenge 1: Write your own closure ==== // Write a simple closure of your own creation. Keep it simple! - +let scoot = "Ride sharing service in SF for electric scooters"; +function whatIsScoot(){ + return scoot; +} +console.log(whatIsScoot()); // ==== Challenge 2: Create a counter function ==== -const counter = () => { +const counter = (closure = 0) => { // Return a function that when invoked increments and returns a counter variable. + let val = closure; + return function counter(){ + val += 1; + console.log(val); + return val; + } }; +const newCounter = counter(); // Example usage: const newCounter = counter(); -// newCounter(); // 1 -// newCounter(); // 2 +newCounter(); // 1 +newCounter(); // 2 // ==== Challenge 3: Create a counter function with an object that can increment and decrement ==== const counterFactory = () => { // Return an object that has two methods called `increment` and `decrement`. + let counter = 0; + console.log(counter); + let increment = () => counter += 1; + let decrement = () => counter -= 1; + let resObj = {increment , decrement}; // `increment` should increment a counter variable in closure scope and return it. + // `decrement` should decrement the counter variable and return it. + return resObj; + }; + let foo = counterFactory(); + + console.log(foo.decrement()); + console.log(foo.increment()); + // return resObj;