Apple Weather inspired web app with Mapbox and OpenWeather

A list of practical projects that anyone can solve in any programming language (See solutions). These projects are divided into multiple categories, and each category has its own folder. To get started, simply fork this repo. CONTRIBUTING See ways of contributing to this repo. You can contribute solutions (will be published in this repo) to existing problems, add new projects, or remove existing ones. Make sure you follow all instructions properly. Solutions You can find implementations of these projects in many other languages by other users in this repo. Credits Problems are motivated by the ones shared at: Martyr2’s Mega Project List Rosetta Code Table of Contents Numbers Classic Algorithms Graph Data Structures Text Networking Classes Threading Web Files Databases Graphics and Multimedia Security Numbers Find PI to the Nth Digit - Enter a number and have the program generate PI up to that many decimal places. Keep a limit to how far the program will go. Find e to the Nth Digit - Just like the previous problem, but with e instead of PI. Enter a number and have the program generate e up to that many decimal places. Keep a limit to how far the program will go. Fibonacci Sequence - Enter a number and have the program generate the Fibonacci sequence to that number or to the Nth number. Prime Factorization - Have the user enter a number and find all Prime Factors (if there are any) and display them. Next Prime Number - Have the program find prime numbers until the user chooses to stop asking for the next one. Find Cost of Tile to Cover W x H Floor - Calculate the total cost of the tile it would take to cover a floor plan of width and height, using a cost entered by the user. Mortgage Calculator - Calculate the monthly payments of a fixed-term mortgage over given Nth terms at a given interest rate. Also, figure out how long it will take the user to pay back the loan. For added complexity, add an option for users to select the compounding interval (Monthly, Weekly, Daily, Continually). Change Return Program - The user enters a cost and then the amount of money given. The program will figure out the change and the number of quarters, dimes, nickels, pennies needed for the change. Binary to Decimal and Back Converter - Develop a converter to convert a decimal number to binary or a binary number to its decimal equivalent. Calculator - A simple calculator to do basic operators. Make it a scientific calculator for added complexity. Unit Converter (temp, currency, volume, mass, and more) - Converts various units between one another. The user enters the type of unit being entered, the type of unit they want to convert to, and then the value. The program will then make the conversion. Alarm Clock - A simple clock where it plays a sound after X number of minutes/seconds or at a particular time. Distance Between Two Cities - Calculates the distance between two cities and allows the user to specify a unit of distance. This program may require finding coordinates for the cities like latitude and longitude. Credit Card Validator - Takes in a credit card number from a common credit card vendor (Visa, MasterCard, American Express, Discoverer) and validates it to make sure that it is a valid number (look into how credit cards use a checksum). Tax Calculator - Asks the user to enter a cost and either a country or state tax. It then returns the tax plus the total cost with tax. Factorial Finder - The Factorial of a positive integer, n, is defined as the product of the sequence n, n-1, n-2, ...1, and the factorial of zero, 0, is defined as being 1. Solve this using both loops and recursion. Complex Number Algebra - Show addition, multiplication, negation, and inversion of complex numbers in separate functions. (Subtraction and division operations can be made with pairs of these operations.) Print the results for each operation tested. Happy Numbers - A happy number is defined by the following process. Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers, while those that do not end in 1 are unhappy numbers. Display an example of your output here. Find the first 8 happy numbers. Number Names - Show how to spell out a number in English. You can use a preexisting implementation or roll your own, but you should support inputs up to at least one million (or the maximum value of your language's default bounded integer type if that's less). Optional: Support for inputs other than positive integers (like zero, negative integers, and floating-point numbers). Coin Flip Simulation - Write some code that simulates flipping a single coin however many times the user decides. The code should record the outcomes and count the number of tails and heads. Limit Calculator - Ask the user to enter f(x) and the limit value, then return the value of the limit statement Optional: Make the calculator capable of supporting infinite limits. Fast Exponentiation - Ask the user to enter 2 integers a and b and output a^b (i.e. pow(a,b)) in O(LG n) time complexity. Classic Algorithms Collatz Conjecture - Start with a number n > 1. Find the number of steps it takes to reach one using the following process: If n is even, divide it by 2. If n is odd, multiply it by 3 and add 1. Sorting - Implement two types of sorting algorithms: Merge sort and bubble sort. Closest pair problem - The closest pair of points problem or closest pair problem is a problem of computational geometry: given n points in metric space, find a pair of points with the smallest distance between them. Sieve of Eratosthenes - The sieve of Eratosthenes is one of the most efficient ways to find all of the smaller primes (below 10 million or so). Graph Graph from links - Create a program that will create a graph or network from a series of links. Eulerian Path - Create a program that will take as an input a graph and output either an Eulerian path or an Eulerian cycle, or state that it is not possible. An Eulerian path starts at one node and traverses every edge of a graph through every node and finishes at another node. An Eulerian cycle is an eulerian Path that starts and finishes at the same node. Connected Graph - Create a program that takes a graph as an input and outputs whether every node is connected or not. Dijkstra’s Algorithm - Create a program that finds the shortest path through a graph using its edges. Minimum Spanning Tree - Create a program that takes a connected, undirected graph with weights and outputs the minimum spanning tree of the graph i.e., a subgraph that is a tree, contains all the vertices, and the sum of its weights is the least possible. Data Structures Inverted index - An Inverted Index is a data structure used to create full-text search. Given a set of text files, implement a program to create an inverted index. Also, create a user interface to do a search using that inverted index which returns a list of files that contain the query term/terms. The search index can be in memory. Text Fizz Buzz - Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”. Reverse a String - Enter a string and the program will reverse it and print it out. Pig Latin - Pig Latin is a game of alterations played in the English language game. To create the Pig Latin form of an English word the initial consonant sound is transposed to the end of the word and an ay is affixed (Ex.: "banana" would yield anana-bay). Read Wikipedia for more information on rules. Count Vowels - Enter a string and the program counts the number of vowels in the text. For added complexity have it report a sum of each vowel found. Check if Palindrome - Checks if the string entered by the user is a palindrome. That is that it reads the same forwards as backward like “racecar” Count Words in a String - Counts the number of individual words in a string. For added complexity read these strings in from a text file and generate a summary. Text Editor - Notepad-style application that can open, edit, and save text documents. Optional: Add syntax highlighting and other features. RSS Feed Creator - Given a link to RSS/Atom Feed, get all posts and display them. Quote Tracker (market symbols etc) - A program that can go out and check the current value of stocks for a list of symbols entered by the user. The user can set how often the stocks are checked. For CLI, show whether the stock has moved up or down. Optional: If GUI, the program can show green up and red down arrows to show which direction the stock value has moved. Guestbook / Journal - A simple application that allows people to add comments or write journal entries. It can allow comments or not and timestamps for all entries. Could also be made into a shoutbox. Optional: Deploy it on Google App Engine or Heroku or any other PaaS (if possible, of course). Vigenere / Vernam / Ceasar Ciphers - Functions for encrypting and decrypting data messages. Then send them to a friend. Regex Query Tool - A tool that allows the user to enter a text string and then in a separate control enter a regex pattern. It will run the regular expression against the source text and return any matches or flag errors in the regular expression. Networking FTP Program - A file transfer program that can transfer files back and forth from a remote web sever. Bandwidth Monitor - A small utility program that tracks how much data you have uploaded and downloaded from the net during the course of your current online session. See if you can find out what periods of the day you use more and less and generate a report or graph that shows it. Port Scanner - Enter an IP address and a port range where the program will then attempt to find open ports on the given computer by connecting to each of them. On any successful connections mark the port as open. Mail Checker (POP3 / IMAP) - The user enters various account information include web server and IP, protocol type (POP3 or IMAP), and the application will check for email at a given interval. Country from IP Lookup - Enter an IP address and find the country that IP is registered in. Optional: Find the Ip automatically. Whois Search Tool - Enter an IP or host address and have it look it up through whois and return the results to you. Site Checker with Time Scheduling - An application that attempts to connect to a website or server every so many minute or a given time and check if it is up. If it is down, it will notify you by email or by posting a notice on the screen. Classes Product Inventory Project - Create an application that manages an inventory of products. Create a product class that has a price, id, and quantity on hand. Then create an inventory class that keeps track of various products and can sum up the inventory value. Airline / Hotel Reservation System - Create a reservation system that books airline seats or hotel rooms. It charges various rates for particular sections of the plane or hotel. For example, first class is going to cost more than a coach. Hotel rooms have penthouse suites which cost more. Keep track of when rooms will be available and can be scheduled. Company Manager - Create a hierarchy of classes - abstract class Employee and subclasses HourlyEmployee, SalariedEmployee, Manager, and Executive. Everyone's pay is calculated differently, research a bit about it. After you've established an employee hierarchy, create a Company class that allows you to manage the employees. You should be able to hire, fire, and raise employees. Bank Account Manager - Create a class called Account which will be an abstract class for three other classes called CheckingAccount, SavingsAccount, and BusinessAccount. Manage credits and debits from these accounts through an ATM-style program. Patient / Doctor Scheduler - Create a patient class and a doctor class. Have a doctor that can handle multiple patients and set up a scheduling program where a doctor can only handle 16 patients during an 8 hr workday. Recipe Creator and Manager - Create a recipe class with ingredients and put them in a recipe manager program that organizes them into categories like desserts, main courses, or by ingredients like chicken, beef, soups, pies, etc. Image Gallery - Create an image abstract class and then a class that inherits from it for each image type. Put them in a program that displays them in a gallery-style format for viewing. Shape Area and Perimeter Classes - Create an abstract class called Shape and then inherit from it other shapes like diamond, rectangle, circle, triangle, etc. Then have each class override the area and perimeter functionality to handle each shape type. Flower Shop Ordering To Go - Create a flower shop application that deals in flower objects and use those flower objects in a bouquet object which can then be sold. Keep track of the number of objects and when you may need to order more. Family Tree Creator - Create a class called Person which will have a name, when they were born, and when (and if) they died. Allow the user to create these Person classes and put them into a family tree structure. Print out the tree to the screen. Threading Create A Progress Bar for Downloads - Create a progress bar for applications that can keep track of a download in progress. The progress bar will be on a separate thread and will communicate with the main thread using delegates. Bulk Thumbnail Creator - Picture processing can take a bit of time for some transformations. Especially if the image is large. Create an image program that can take hundreds of images and converts them to a specified size in the background thread while you do other things. For added complexity, have one thread handling re-sizing, have another bulk renaming of thumbnails, etc. Web Page Scraper - Create an application that connects to a site and pulls out all links, or images, and saves them to a list. Optional: Organize the indexed content and don’t allow duplicates. Have it put the results into an easily searchable index file. Online White Board - Create an application that allows you to draw pictures, write notes and use various colors to flesh out ideas for projects. Optional: Add a feature to invite friends to collaborate on a whiteboard online. Get Atomic Time from Internet Clock - This program will get the true atomic time from an atomic time clock on the Internet. Use any one of the atomic clocks returned by a simple Google search. Fetch Current Weather - Get the current weather for a given zip/postal code. Optional: Try locating the user automatically. Scheduled Auto Login and Action - Make an application that logs into a given site on a schedule and invokes a certain action and then logs out. This can be useful for checking webmail, posting regular content, or getting info for other applications and saving it to your computer. E-Card Generator - Make a site that allows people to generate their own little e-cards and send them to other people. Do not use Flash. Use a picture library and perhaps insightful mottos or quotes. Content Management System - Create a content management system (CMS) like Joomla, Drupal, PHP Nuke, etc. Start small. Optional: Allow for the addition of modules/addons. Web Board (Forum) - Create a forum for you and your buddies to post, administer and share thoughts and ideas. CAPTCHA Maker - Ever see those images with letters numbers when you signup for a service and then ask you to enter what you see? It keeps web bots from automatically signing up and spamming. Try creating one yourself for online forms. Files Quiz Maker - Make an application that takes various questions from a file, picked randomly, and puts together a quiz for students. Each quiz can be different and then reads a key to grade the quizzes. Sort Excel/CSV File Utility - Reads a file of records, sorts them, and then writes them back to the file. Allow the user to choose various sort style and sorting based on a particular field. Create Zip File Maker - The user enters various files from different directories and the program zips them up into a zip file. Optional: Apply actual compression to the files. Start with Huffman Algorithm. PDF Generator - An application that can read in a text file, HTML file, or some other file and generates a PDF file out of it. Great for a web-based service where the user uploads the file and the program returns a PDF of the file. Optional: Deploy on GAE or Heroku if possible. Mp3 Tagger - Modify and add ID3v1 tags to MP3 files. See if you can also add in the album art into the MP3 file’s header as well as other ID3v2 tags. Code Snippet Manager - Another utility program that allows coders to put in functions, classes, or other tidbits to save for use later. Organized by the type of snippet or language the coder can quickly lookup code. Optional: For extra practice try adding syntax highlighting based on the language. Databases SQL Query Analyzer - A utility application in which a user can enter a query and have it run against a local database and look for ways to make it more efficient. Remote SQL Tool - A utility that can execute queries on remote servers from your local computer across the Internet. It should take in a remote host, user name, and password, run the query and return the results. Report Generator - Create a utility that generates a report based on some tables in a database. Generates sales reports based on the order/order details tables or sums up the day's current database activity. Event Scheduler and Calendar - Make an application that allows the user to enter a date and time of an event, event notes, and then schedule those events on a calendar. The user can then browse the calendar or search the calendar for specific events. Optional: Allow the application to create re-occurrence events that reoccur every day, week, month, year, etc. Budget Tracker - Write an application that keeps track of a household’s budget. The user can add expenses, income, and recurring costs to find out how much they are saving or losing over a period of time. Optional: Allow the user to specify a date range and see the net flow of money in and out of the house budget for that time period. TV Show Tracker - Got a favorite show you don’t want to miss? Don’t have a PVR or want to be able to find the show to then PVR it later? Make an application that can search various online TV Guide sites, locate the shows/times/channels and add them to a database application. The database/website then can send you email reminders that a show is about to start and which channel it will be on. Travel Planner System - Make a system that allows users to put together their own little travel itinerary and keep track of the airline/hotel arrangements, points of interest, budget, and schedule. Graphics and Multimedia Slide Show - Make an application that shows various pictures in a slide show format. Optional: Try adding various effects like fade in/out, star wipe, and window blinds transitions. Stream Video from Online - Try to create your own online streaming video player. Mp3 Player - A simple program for playing your favorite music files. Add features you think are missing from your favorite music player. Watermarking Application - Have some pictures you want copyright protected? Add your own logo or text lightly across the background so that no one can simply steal your graphics off your site. Make a program that will add this watermark to the picture. Optional: Use threading to process multiple images simultaneously. Turtle Graphics - This is a common project where you create a floor of 20 x 20 squares. Using various commands you tell a turtle to draw a line on the floor. You have moved forward, left or right, lift or drop the pen, etc. Do a search online for "Turtle Graphics" for more information. Optional: Allow the program to read in the list of commands from a file. GIF Creator A program that puts together multiple images (PNGs, JPGs, TIFFs) to make a smooth GIF that can be exported. Optional: Make the program convert small video files to GIFs as well. Security Caesar cipher - Implement a Caesar cipher, both encoding, and decoding. The key is an integer from 1 to 25. This cipher rotates the letters of the alphabet (A to Z). The encoding replaces each letter with the 1st to 25th next letter in the alphabet (wrapping Z to A). So key 2 encrypts "HI" to "JK", but key 20 encrypts "HI" to "BC". This simple "monoalphabetic substitution cipher" provides almost no security, because an attacker who has the encoded message can either use frequency analysis to guess the key, or just try all 25 keys.

Turn any electrical irrigation valve into a smart-valve.. or run your pumps on a smart schedule based on your climate! This homebridge plugin exposes a multi-zone irrigation sprinkler dummy control system to Apple's HomeKit. Although a dummy, it brings smarts of an evapotranspiration based climate and plant adaptive irrigation controller with the use of OpenWeatherMap API. The plugin can optionally email you, and/or send you push notifications through Pushover or Pushcut, with the watering schedule it has calculated, or when a watering run is completed, along with the next 7-day weather forecast. Added option to expose system controls to Homekit allowing a user to enable/disable irrigation, rechecks, push and email notifications from within the Home App. Associated WaterLevel Characteristic shows the % of watering cycle remaining.

⛈ A weather app using Next.js, Mantine, Redux Toolkit, and Open-Meteo API.

WeatherApp is a simple web app built with React that allows users to check the current weather and forecast for the next few days by entering a city name. The app uses the OpenWeatherMap API to fetch real-time weather data.

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An Android App where you can check weather from city you want and see forecast for next tree days, it was built with mvvm, dagger-hilt, livedata,coroutines, jetpack libraries...

A simple weather forecast app using Next.js and OpenWeather API.

Weatherly is a comprehensive weather application that provides real-time updates, forecasts, and detailed weather metrics. It's built with modern web technologies to provide a seamless and engaging user experience.

Personal Weather App, which shows the forecast for the next 5 days. It gives the highest/lowest temperature for the day and an icon.

Minimalist weather app with Next.js 15 and TypeScript. Uses free Open-Meteo API (no key required), browser geolocation with fallbacks, 5-day forecast, and auto-refresh. Zero external dependencies, <100KB bundle, <2s load time. MIT licensed.

Angular-Directive-Project Directives range from very basic to extremely complex. This project will build up to some somewhat difficult directives. Keep in mind that the format we're learning for directives is the same format used to build some extremely complex things in angular. Using directives often and well is one way to show you're a talented developer. Starting Out We've included only a few things for you to begin with. index.html, app.js, styles.css. At this point the best way to get more comfortable with angular is to initialize an app without relying heavily on boilerplate code (reusable code that starts out your projects for you). You'll notice that in the index.html we've included the angular-route CDN. Yes, we'll be using angular's router here. Put an ng-view into your index.html. In your app.js set up a config and set up our first route for when a user is at the '/home' url. If you're having trouble remembering how to set up the router go look at how you set up the router on the previous project. One way these projects will be beneficial to you is allowing you to look back at something *you** did and seeing how you got that something to work.* You may also want add an otherwise that defaults to /home. Create a controller and a template file for this route in your app folder. Don't forget to include the controller as a script in your index.html Check that everything is hooked up correctly. Try adding a div with some text in your home template just to make sure it's showing up. Once you've got that going you're ready to start on some directives. Now let's make our directive. We'll start with a simple one that we can use to display information passed to it. Step 1. Start your directive Woot. When you're initializing your directive just remember that it works very similarly to how you start up a controller or a service. It can also be very helpful to think of your directive as a route. Create your directive. You'll use the directive method on your angular module. It takes two arguments, the name string and the callback function, which will return the object that represents your directive. When naming your directive give it a name with two words; dirDisplay would be nice, but anything works. Just remember it's best practice to give a directive a camel case name so that it's clear in your html what it is. Also we're going to need a template html for our directive. We could do it inline, but let's make another file instead. Just name it something that makes sense for the name of your directive and put it in the same directory as your directive file. For your template just make a <div> and inside a <h1> tag that says User. Now in your home route html add in your directive. It will look like this if you named it dirDisplay: <dir-display></dir-display> Start up your app and go to the home route. Check and make sure you see User where your directive was placed. If you're not seeing it at this point it could mean a few things. Here's some more common issues. You didn't link your directive in your index as a script. Your name for your directive doesn't match the name in your html. Remember camel case becomes snake case so myDirective becomes <my-directive></my-directive>. You're file path to your html template is wrong. You have to think of file paths in angular as relative to the index. Here's some code to see just for this part, and just for the directive's js file. var app = angular.module('directivePractice'); app.directive('dirDisplay', function(){ return { templateUrl: 'app/directives/dirDisplay.html' }; }); What we're returning is the directive object. You won't see anymore code in this tutorial so it's important you get things working right and refer back to what you've already done to advance from now on. Step 2. Advancing directives Your directive should be loaded up now, but it's not really doing much. Let's make it better. In your home controller. Make a variable on your $scope called user. Set it's value to { name: "Geoff McMammy", age: 43, email: "geofdude@gmail.com" } Now inside your directive's html specifically inside the <h3> tags display our new user's name. Then inside maybe some <h4> tags display his email and age. This is going to work exactly the same as if it was just inside your home controller. Reload the page and make sure it works. This is still very cosmetic and really not all that useful. It needs functionality. Add into your directive's object the link property. The link property's value is a function definition that takes (generally) three parameters. scope, element, and attributes. Unlike in other places with angular injection these parameter names don't carry meaning. The first parameter will always represent your $scope for that directive, the second will always be the element that wraps your whole directive, and the third will always be an object containing all the properties and values of the attributes on your directive in the dom. Try the following to get a feel for all three. Add two attributes to your directive in your html. Like this - <dir-display test="myTest" my-check="checkItOut"></dir-display> Now in the link property you've added console.log the three parameters in the function. You'll see an object for scope that should look identical to the $scope of your html function. For element you'll see an object the represents the DOM wrapper for your directive. For attributes you'll see an object that will look like this: { test: "myTest", myCheck: "checkItOut" } An important thing to notice is how it has again converted snake case to camel case for you. my-check became myCheck. Don't forget this. You'll run into this issue one day. It counts for both attributes and directive names. To feel some of what the link function could do let's try this. Add a ng-show to both the email and age wrappers. This should be familiar to you. Now inside your link function add a click event listener to your element property. It's going to look just like jQuery. element.on('click', function(){ }) Inside the click listener's callback add a toggle for the ng-show property you passed in. Along with a console.log to make sure things are connecting when you click. Try it out. Don't call for a mentor when it doesn't work. Let's talk about that first. You should see the console.log firing, but why isn't it toggling. This is going to be a common problem when working with the link function and event listeners. What we have here is an angular digest problem. The value is changing on the scope object, but the change isn't being reflected by our DOM. That's because angular isn't aware of the change yet. Anytime we cause an event to happen using something like jQuery or even angular's jQLite we need to let angular know that we've made a change. Add this line of code in place of your console.log, scope.$apply(). Now try it out. It should be working now, so if you're still having issues it's time to debug. What we've done is forced angular to run it's digest cycle. This is where angular checks the scope object for changes and then applies those to the DOM. This is another good lesson to learn for later. You'll most likely hit this when making changes to your element using event listeners. Step 3. Directive's re-usability. Now our directive has some extremely basic functionality. One of a directive's greatest advantages though is its ability to be placed anywhere and still be functional. Let's say instead we had a list of users instead of just one. Change the $scope property in your home controller to be users and give it this array as its value: [ { name: "Geoff McMammy", age: 43, email: "geofdude@gmail.com", city: "Provo" }, { name: "Frederick Deeder", age: 26, email: "fredeed@gmail.com", city: "Austin" }, { name: "Spencer Rentz", age: 35, email: "spencerrentz@gmail.com", city: "Sacramento" }, { name: "Geddup Ngo", age: 43, email: "geddupngo@gmail.com", city: "Orlando" }, { name: "Donst Opbie Leevin", age: 67, email: "gernee@gmail.com", city: "Phoenix" } ] Now in your home HTML add a ng-repeat to the directive call. Tell it to repeat for each user in users. Reload your page. It's working! But why? How does each directive instance know what information to display? In the link function console.log the scope parameter. Make sure it's outside of your click listener. You'll see five print outs in your console. Open up any one of them and look to the bottom. Open up the user property. It's exactly what we would want! But again why would that be the case? Don't get too caught up in this next bit if it's too hard to understand, but the ng-repeat is essentially making new tiny scope objects for each individual user in our users array. Now each of our directives is still getting a user property on the scope object just like the directive wanted in the beginning. Woot. Step 4. Ramp it up with Isolate Scope. Directives can do so much more. So let's make that happen. That means we should make.... a new directive!!! This directive's purpose will be to display a selected User and the weather in his/her/its location. Link it up just like the last one. Create a js file for our directive and name it dirWeather. Make an html file named dirWeather.html. Link it up in your index.html and add the template to your new directive object. In your directive's template give it an <h3> tag that says Weather just so we can know it's working. Above your ng-repeat on dirDisplay add your new dirWeather directive. If it's not working check the instructions above as to some common reasons why before asking a mentor for help. If you're seeing the Weather text on your page then we're ready to try out the dreaded Isolate Scope. The isolate scope object is one of the stranger API's in angular. I'm sorry but it is. Just refer to this for now. scope: { string: '@', link: '=', func: '&' } The properties on the scope object represent the attributes on the directive in the html. Our example scope object here would look something like this in the html. <example-directive string="a string" link="user" func="updateUser()"></example-directive> The hard part here is the @, =, and &. They each have very important and distinct meanings. @ says take in my attribute value as a string. = says take in my attribute value as a two-way bound variable from the parent scope. & says take in my attribute value as a reference to a function on the parent scope. It's also critical to point out that once you add a scope object you have no isolated your directive's scope. Meaning, aside from the values passed in through attributes, this directive has no connection to the $scope of its parent. That being said let's isolate our directive's scope. :worried: Add the scope property to your dirWeather. Give it the value of an object with a property of currentUser whose value is '='. Remember in your html this will look like current-user. This is the third time I've said so don't expect it again. This means that whatever comes into the currentUser attribute is going to be a value of the parent's scope object. For now test this out by passing in users[0]. Find a way to show that users information inside your dirWeather's html. Remember inside your directive now the user is represented by currentUser. Step 5. &? &!? The '=' value on your scope object has created a two-way binding between users[0] and currentUser. Now let's try out the '&'. On your home controller add a function called getWeather. It takes one parameter called city. This function will make a call to a service so we'll need to create that. Make a weather service. Name it something cool and creative like weatherService. Inside the weather service make a function called getWeather that also takes one parameter, city. Make an $http get to this url - 'http://api.openweathermap.org/data/2.5/weather?q=' After the q= add on the city parameter. If you want you can test this out in postman. See what kind of data you get back. If it's the weather of that city then... you win! Use $q to return a promise that only resolves with the data you want. Temperature (preferably not in Kelvin) and the weather description. Use console.log on the data coming from the $http request to get to what you want. You'll need to add both on an object that you resolve your new promise with. On your home controller have it return the result of invoking the get getWeather function on the service. You should be returning a promise. Now in your home route's HTML pass in the getWeather function to the dirWeather directive through an attribute called weather-call. Add the attribute to your isolate scope object. That was a lot of linking, but let's walk through it. Your controller has a function linked to the service, which is in turn linked to your directive. So if you run the weatherCall function in your directive it will go through your controller to your service and then back. Now things get a little bit tricky. Angular's way of passing along arguments through a directive to your controller are tricky, but once you understand how to do it, it's not hard. I'm going to give an example here of how it works. <my-directive pass-func="callFunc(data)"></my-directive> Here's how it would look in your HTML. But where's the data supposed to be coming from? It seems that you'd rather be able to pass in data from your directive. Well you still can, you just have to essentially tell angular what do use as an argument to replace data when it calls that function in your controller. The actualy function call inside the directive will look like this. $scope.passFunc({data: wantedData}) So what you'll do is pass in an object where the property name is what the argument is named in the HTML where you call the directive. That might sound confusing, but just look at the two code blocks above for a pattern. Note that pass-func becomes $scope.passFunc and data is being replaced with wantedData with the {data: wantedData} object. In our directive we want to replace city in the attribute call, for something else inside the directive. You'll follow the same pattern as above. For now let's get things set up for that function call. Add to the dirWeather directive object a property called controller. It's value will be a function. Yes, this is a controller specifically for your one directive. It works the same as any other controller, except you don't give it a name. It's $scope object will only be accessible within an instance of your directive. Don't forget to inject $scope in the function. Inside your controller function run the weatherCall function with the city property from the currentUser on your $scope. Here's where you need to make sure you've passed in a city argument in the attribute function call, and then replace that with your currentUser's city using an object with a city property. The function call should return a promise, so call .then afterward and add the data onto your $scope to display both the weather and temperature of the currentUser's city. The properties can be named whatever makes sense to you. You may also want to find a way to get rid of all the decimal places on your temperature. Now you should have everything hooked up so it shows Geoff's data and the weather data for Provo. But is that good enough? Step 6. Ramping up our ramp up. Now let's change this so it shows the weather data for whichever user we select. We're going to need to use '&' again. Make a function on the home controller that takes in a parameter and sets a property on the $scope to be that parameter. Maybe you see where this is going. We want to get this function into our dirDisplay controller. But in order to do that we need to isolate dirDisplay's scope. This also means we need to pass in each individual user through the scope object as well. To make it easier on ourselves, let's pass the current user from our ng-repeat into our directive through a user attribute. This way we can leave our two-way bindings as they are. Also pass our new function that sets our current user from our home controller into our directive through a setUser attribute. You'll need to add an argument in there again. Go with user. Your scope object in dirDisplay should have two properties. setUser with the value of '&' and user with the value of '='. As before we're going to need to do some tricky stuff to get our argument back to our controller. Call the setUser function inside our click event listener and pass in an object the sets our user argument to be the user on our directive's scope object. If you've forgotten this part go back up and take a look at how you did it before or the example in this README. Whatever user you click on now should show up in the dirWeather directive as the current user. But we're missing one thing, we want to be able to see the weather for that user too. We'll have to do one more thing that will seem a little bit tricky at first, but it's good to learn if you don't know it already since it's actually used quite frequently. We need to step up a change listener on our currentUser in the dirWeather directive. We'll use angular's $watch functionality. $watch is a method on your $scope that will watch for changes in a variable you give it. It works in two ways. $scope.$watch('property', function(value){ console.log("When $scope.property changes its new value is: ", value) }); And $scope.$watch(function(){ return myVar }, function(value){ console.log("When myVar changes its new value is: ", value); }); Remove the immediate function call that we have in there now. Maybe just comment it out for now because we'll use it in a bit. Now call the $watch method on your scope and have it watch currentUser. Either way of using $watch is fine. Have its callback run the $scope.weatherCall function just like you had it before. One thing to note is that $scope.$watch will always run once to begin with. Since that's what we want here it's great, but just be aware of that. If you've reached this point congratulate yourself. You've messed with some serious stuff today, namely directives. There are still a lot of things about directives that we can't possibly cover in a single project. If you like what we've done so far then you're in a good place to keep going. A developer who understands directives well can build a really clean looking code base. Just look at your home.html. It could have just two lines in it. If you're feeling good move on now to Step 7. Step 7. Finishing touches Try to work out these problems on your own. There should be a way to let the user know that the weather data is loading. Something that appears while our $http request is retrieving our data. The $http request shouldn't fire on both opening and closing a user's information. A color change for the currently active user would be nicer than showing that user's info inside the dirWeather modal. Or at least less redundant. Whatever else you want. We still haven't explored transclusion and ng-transclude so give that a try if you're feeling adventurous. Just know that it's a way for deciding where to put the HTML child elements of a directive. It's cool stuff that can involve some criss-crossing of scopes.

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