WIP - Creates first assignment, implements steps in readme

Author: ryan-hamblin

README.md

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+# JavaScript - I
+
+* The point of these assignments is to take your knowledge of JavaScript and start putting into practice the principles learned throughout JavaScript I.
+
+## Assignment Description
+
+* Fork/Clone this repository.
+* Complete all the exercises as described inside each assignment file.
+* Use `console.log()` statements to check to see if your code does what it is supposed to do.
+* To test your `console` statements you can either run `node /assignments/<fileName>` and see what prints in your terminal. You can also use an online REPL like `JSBin`, `REPL.it`, `JSFiddle` or even your `Chrome developer console`.
+* Once you finish the exercises in a file, commit your code, and push it to your fork.
+* Once your assignments are logging out the expected output, and you've
+
+### Callbacks
+
+* In this file you'll be receiving a lot of training on how to use callbacks to pass around data.
+* Write out each function using the `ES5` `function` keyword syntax.
+* Remember that a callback function is simply a function that is being passed around to other functions.
+* **Stretch Problem** After you're done with all of the functions, go ahead and re-factor all of them to use `ES6` `Arrow Functions`

assignments/callbacks.js

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+const items = ['Pencil', 'Notebook', 'yo-yo', 'Gum'];
+
+function firstItem(arr, cb) {
+  // firstItem passes the first item of the given array to the callback function.
+}
+
+function getLength(arr, cb) {
+  // getLength passes the length of the array into the callback.
+}
+
+function last(arr, cb) {
+  // last passes the last item of the array into the callback.
+}
+
+function sumNums(x, y, cb) {
+  // sumNums adds two numbers (x, y) and passes the result to the callback.
+}
+
+function multiplyNums(x, y, cb) {
+  // multiplyNums multiplies two numbers and passes the result to the callback.
+}
+
+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.
+}
+
+/* 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.
+}