diff --git a/lab-nathan/.eslintignore b/lab-nathan/.eslintignore
new file mode 100644
index 0000000..05b1cf3
--- /dev/null
+++ b/lab-nathan/.eslintignore
@@ -0,0 +1,5 @@
+**/node_modules/*
+**/vendor/*
+**/*.min.js
+**/coverage/*
+**/build/*
diff --git a/lab-nathan/.eslintrc b/lab-nathan/.eslintrc
new file mode 100644
index 0000000..c8dfef7
--- /dev/null
+++ b/lab-nathan/.eslintrc
@@ -0,0 +1,23 @@
+{
+  "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
+  },
+  "parserOptions": {
+    "ecmaFeatures": {
+      "modules": true,
+      "experimentalObjectRestSpread": true,
+      "impliedStrict": true
+    }
+  },
+  "extends": "eslint:recommended"
+}
diff --git a/lab-nathan/.gitignore b/lab-nathan/.gitignore
new file mode 100644
index 0000000..345130c
--- /dev/null
+++ b/lab-nathan/.gitignore
@@ -0,0 +1,136 @@
+# 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
diff --git a/lab-nathan/index.js b/lab-nathan/index.js
new file mode 100644
index 0000000..5fced61
--- /dev/null
+++ b/lab-nathan/index.js
@@ -0,0 +1,5 @@
+'use strict';
+
+const fp = require('./lib/fp.js');
+
+fp.map(process.argv.slice(2), a => console.log(a.toUpperCase()));
\ No newline at end of file
diff --git a/lab-nathan/lib/fp.js b/lab-nathan/lib/fp.js
new file mode 100644
index 0000000..09cbe80
--- /dev/null
+++ b/lab-nathan/lib/fp.js
@@ -0,0 +1,13 @@
+'use strict';
+
+let fp = {};
+module.exports = fp;
+
+fp.map = (array, func) => Array.prototype.map.call(array, func);
+fp.filter = (array, predicate) => Array.prototype.filter.call(array, predicate);
+fp.reduce = (array, func, initialValue) => Array.prototype.reduce.call(array, func, initialValue);
+fp.concat = (arrayA, arrayB) => Array.prototype.concat.call(arrayA, arrayB);
+fp.splice = (array, start, deleteCount, items) => {
+  Array.prototype.splice.call(array, start, deleteCount, ...items);
+  return array;
+};
\ No newline at end of file
diff --git a/lab-nathan/package.json b/lab-nathan/package.json
new file mode 100644
index 0000000..fd82602
--- /dev/null
+++ b/lab-nathan/package.json
@@ -0,0 +1,18 @@
+{
+  "name": "lab-nathan",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "lint": "eslint .",
+    "test": "mocha"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "chai": "^4.1.0",
+    "mocha": "^3.4.2"
+  }
+}
diff --git a/lab-nathan/test/fp-test.js b/lab-nathan/test/fp-test.js
new file mode 100644
index 0000000..53f9e11
--- /dev/null
+++ b/lab-nathan/test/fp-test.js
@@ -0,0 +1,61 @@
+'use strict';
+
+const fp = require('../lib/fp.js');
+const expect = require('chai').expect;
+
+describe('fp', () => {
+  describe('#map()', () => {
+    it('should fail with invalid inputs.', () => {
+      expect(fp.map).to.throw(Error);
+    });
+
+    it('should return an array of doubled values.', () => {
+      let result = fp.map([1, 2, 3], num => num * 2);
+      expect(result).to.deep.equal([2, 4, 6]);
+    });
+  });
+
+  describe('#filter()', () => {
+    it('should fail with invalid inputs.', () => {
+      expect(fp.filter).to.throw(Error);
+    });
+
+    it('should return 2.', () => {
+      let result = fp.filter([1, 2, 3], num => num !== 2);
+      expect(result).to.deep.equal([1, 3]);
+    });
+  });
+
+  describe('#reduce()', () => {
+    it('should fail with invalid inputs.', () => {
+      expect(fp.reduce).to.throw(Error);
+    });
+
+    it('should return 6.', () => {
+      let result = fp.reduce([1, 2, 3], (acc, cur) => acc + cur, 0);
+      expect(result).to.equal(6);
+    });
+  });
+
+  describe('#concat()', () => {
+    it('should fail with invalid inputs.', () => {
+      expect(fp.concat).to.throw(Error);
+    });
+
+    it('should return [1, 2, 3, 4, 5, 6].', () => {
+      let result = fp.concat([1, 2, 3], [4, 5, 6]);
+      expect(result).to.deep.equal([1, 2, 3, 4, 5, 6]);
+    });
+  });
+
+  describe('#splice()', () => {
+    it('should fail with invalid inputs.', () => {
+      expect(fp.splice).to.throw(Error);
+    });
+
+    it('should return [1, 2, 3, 7, 8, 9, 4, 5, 6].', () => {
+      let result = fp.splice([1, 2, 3, 4, 5, 6], 3, 0, [7, 8, 9]);
+      expect(result).to.deep.equal([1, 2, 3, 7, 8, 9, 4, 5, 6]);
+    });
+  });
+});
\ No newline at end of file
diff --git a/lab-nathan/test/index-test.js b/lab-nathan/test/index-test.js
new file mode 100644
index 0000000..5c97298
--- /dev/null
+++ b/lab-nathan/test/index-test.js
@@ -0,0 +1,23 @@
+'use strict';
+
+const expect = require('chai').expect;
+const { spawn } = require('child_process');
+
+describe('index', () => {
+  it('should produce uppercase params.', done => {
+    let child = spawn('node', ['index.js', 'hi', 'hello'], {
+      shell: true,
+    });
+
+    let buffer = [];
+    
+    child.stdout.on('data', chunk => {
+      buffer.push(chunk.toString().trim());
+    });
+
+    child.stdout.on('end', () => {
+      expect(buffer.join(' ')).to.equal('HI HELLO');
+      done();
+    });
+  });
+});
\ No newline at end of file