lab-jonah

.eslintignore

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+**/node_modules/*
+**/vendor/*
+**/*.min.js
+**/coverage/*
+**/build/*

.eslintrc

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+{
+  "rules": {
+    "no-console": "off",
+    "indent": [ "error", 2 ],
+    "quotes": [ "error", "single" ],
+    "semi": ["error", "always"],
+    "linebreak-style": [ "error", "unix" ]
+  },
+  "env": {
+    "es6": true,
+    "node": true,
+    "mocha": true,
+    "jasmine": true
+  },
+  "ecmaFeatures": {
+    "modules": true,
+    "experimentalObjectRestSpread": true,
+    "impliedStrict": true
+  },
+  "extends": "eslint:recommended"
+}

.gitignore

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+# Created by https://www.gitignore.io/api/osx,vim,node,macos,windows
+
+### macOS ###
+*.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+
+### OSX ###
+
+# Icon must end with two \r
+
+# Thumbnails
+
+# Files that might appear in the root of a volume
+
+# Directories potentially created on remote AFP share
+
+### Vim ###
+# swap
+[._]*.s[a-v][a-z]
+[._]*.sw[a-p]
+[._]s[a-v][a-z]
+[._]sw[a-p]
+# session
+Session.vim
+# temporary
+.netrwhist
+*~
+# auto-generated tag files
+tags
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# End of https://www.gitignore.io/api/osx,vim,node,macos,windows

README.md

@@ -1,31 +1,20 @@
-![cf](https://i.imgur.com/7v5ASc8.png) 02: Tools and Context
-======
+# Functional Programming and Standalone Functions
 
-## To Submit this Assignment
-  * fork this repository & create a new branch for your work
-  * write all of your code in a directory named `lab-` + `<your name>` **e.g.** `lab-susan`
-  * push to your repository
-  * submit a pull request to this repository
-  * submit a link to your PR in canvas
-  * write a question and observation on canvas
+This lab focuses on creating standalone functions of Array prototype methods and using ChaiJS to implement BDD/TDD styles to testing.
 
-## Directions
-  * create a `/lib` and `/test` directory
-  * add a robust `.gitignore` file
-  * include a `package.json`
-  * include the provided `.eslintrc` file
-  * create a `lint` script for running eslint
-  * create a `test` script for running mocha
-  * create a `lib/fp.js` file for holding the following:
-    * create stand alone `map`, `filter`, `reduce`, `concat`, and `splice` functions using the `call`, and `apply` methods we discussed today
-    * you are welcome to use/experiment with `bind` too!
-  * *note:* - all functions should be created using the es6 lexical arrow function syntax
+## Methods
 
-# Tests
-  * create a test for each of your custom functions in `lib/fp.js`
-    * note - feel free to create additional tests, if you choose!
+### Map
+Applies a function on each element of an array
 
-## Bonus 2pts
-  * create a CLI (`index.js`) that will use your new `map` function to uppercase all command line arguments and print them to the screen: 1pt
-    * **hint:** - you'll want to check out the `process` object (and it's methods) to get an array of provided command line arguments
-  * test your CLI: 1pt
+### Filter
+Predicate applied to each element, returns new array of true values
+
+### Concat
+Joins two arrays
+
+### Splice
+Manipulates array by inserting or deleting at a specific index. Returns manipulated array.
+
+### Reduce
+Sums values in an array

index.js

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+'use strict';
+
+module.exports = exports = {};
+
+const fp = require('./lib/fp.js');
+
+exports.upCase = arr => fp.map(arr, el => el.toUpperCase());
+
+console.log(exports.upCase(process.argv));

lib/fp.js

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+'use strict';
+
+module.exports = exports = {};
+
+exports.map = (arr, callback) => {
+  if (!arr) throw new Error('no array provided');
+  if (!callback) throw new Error('no callback provided');
+
+  return Array.prototype.map.call(arr, callback);
+};
+
+exports.filter = (arr, callback) => {
+  if (!arr) throw new Error('no array provided');
+  if (!callback) throw new Error('no callback provided');
+
+  return Array.prototype.filter.call(arr, callback);
+};
+
+exports.concat = (arr1, arr2) => {
+  if (!arr1) throw new Error('no array provided');
+  if (!arr2) throw new Error('no array provided');
+
+  return Array.prototype.concat.apply(arr1, arr2);
+};
+
+exports.splice = (arr, start, deleteCount, item=[]) => {
+  if (!arr) throw new Error('no array provided');
+  if (!start) throw new Error('no start provided');
+  if (!item) throw new Error('item is undefined');
+  if (typeof deleteCount !== 'number') throw new Error('no deleteCount provided');
+
+  Array.prototype.splice.call(arr, start, deleteCount, ...item);
+  return arr;
+};
+
+exports.reduce = (arr, callback, start=0) => {
+  if (!arr) throw new Error('no array provided');
+  if (!callback) throw new Error('no callback provided');
+
+  return Array.prototype.reduce.call(arr, callback, start);
+};

package.json

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+{
+  "name": "02-tools_and_context",
+  "version": "1.0.0",
+  "description": "![cf](https://i.imgur.com/7v5ASc8.png) 02: Tools and Context ======",
+  "main": "index.js",
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "start": "node index.js",
+    "test": "mocha",
+    "lint": "eslint .; exit 0"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/codefellows-javascript-401d17/02-tools_and_context.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/codefellows-javascript-401d17/02-tools_and_context/issues"
+  },
+  "homepage": "https://github.com/codefellows-javascript-401d17/02-tools_and_context#readme",
+  "devDependencies": {
+    "chai": "^4.1.0",
+    "mocha": "^3.4.2"
+  }
+}

test/fp-test.js

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+'use strict';
+
+const fp = require('../lib/fp.js');
+const expect = require('chai').expect;
+
+describe('FP Module', () => {
+  describe('#map', () => {
+    it('should return [2, 4, 6, 8]', () => {
+      var result = fp.map([1, 2, 3, 4], (n) => n * 2);
+      expect(fp.map).to.be.a('function');
+      expect(result).to.deep.equal([2, 4, 6, 8]);
+    });
+  });
+
+  describe('#filter', () => {
+    it('should return [1, 3, 4]', () => {
+      var result = fp.filter([1, 2, 3, 4], n => n !== 2);
+      expect(fp.filter).to.be.a('function');
+      expect(result).to.deep.equal([1, 3, 4]);
+    });
+  });
+
+  describe('#concat', () => {
+    it('should return [1, 2, 3, a, b, c]', () => {
+      var result = fp.concat([1, 2, 3], ['a', 'b', 'c']);
+      expect(fp.concat).to.be.a('function');
+      expect(result).to.deep.equal([1, 2, 3, 'a', 'b', 'c']);
+    });
+  });
+
+  describe('#splice', () => {
+    it('should return [duck, duck, duck]', () => {
+      var result = fp.splice(['duck', 'duck', 'goose', 'duck'], 2, 1);
+      expect(fp.splice).to.be.a('function');
+      expect(result).to.deep.equal(['duck', 'duck', 'duck']);
+    });
+
+    it('should return [duck0, duck1, oyster, duck2]', () => {
+      var result = fp.splice(['duck0', 'duck1', 'duck2'], 2, 0, ['oyster']);
+      expect(fp.splice).to.be.a('function');
+      expect(result).to.deep.equal(['duck0', 'duck1', 'oyster', 'duck2']);
+    });
+  });
+
+  describe('#reduce', () => {
+    it('should return 25', () => {
+      var result = fp.reduce([1, 2, 3, 4], (a, b) => a + b, 15);
+      expect(fp.reduce).to.be.a('function');
+      expect(result).to.equal(25);
+    });
+
+    it('should return 10', () => {
+      var result = fp.reduce([1, 2, 3, 4], (a, b) => a + b);
+      expect(fp.reduce).to.be.a('function');
+      expect(result).to.equal(10);
+    });
+  });
+});

test/index-test.js

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+'use-strict';
+
+const index = require('../index.js');
+const expect = require('chai').expect;
+
+describe('Index Module', () => {
+  it('should return uppercase el in arr', () => {
+    var result = index.upCase(['a', 'b', 'c']);
+
+    expect(index.upCase).to.be.a('function');
+    expect(result).to.deep.equal(['A', 'B', 'C']);
+  });
+});