Initial Setup

Author: Tyler Garlick

.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["pundits"]
+}

package.json

@@ -4,7 +4,8 @@
   "description": "Simple UUID generation",
   "main": "index.js",
   "scripts": {
-    "test": "mocha test"
+    "test": "mocha test",
+    "build": "babel src -d build --source-maps inline"
   },
   "repository": {
     "type": "git",
@@ -21,8 +22,31 @@
   },
   "homepage": "https://github.com/TylerGarlick/simple-uuid",
   "devDependencies": {
+    "ava": "^0.19.1",
+    "babel-cli": "^6.24.1",
+    "babel-polyfill": "^6.23.0",
+    "babel-preset-pundits": "^2.0.3",
+    "babel-register": "^6.24.1",
     "chai": "^1.10.0",
     "lodash": "^2.4.1",
     "mocha": "^2.1.0"
+  },
+  "ava": {
+    "files": [
+      "test/**/*.test.js"
+    ],
+    "source": [
+      "**/*.{js,jsx}",
+      "!dist/**/*"
+    ],
+    "concurrency": 5,
+    "failFast": true,
+    "failWithoutAssertions": false,
+    "tap": true,
+    "powerAssert": false,
+    "require": [
+      "babel-register"
+    ],
+    "babel": "inherit"
   }
 }

src/index.js

@@ -0,0 +1,20 @@
+/**
+ * Generate a UUID
+ * @returns {string}
+ */
+export default () => {
+  const lut = [];
+  for (let i = 0; i < 256; i++) {
+    lut[i] = (i < 16 ? '0' : '') + (i).toString(16);
+  }
+
+  const d0 = Math.random() * 0xffffffff | 0;
+  const d1 = Math.random() * 0xffffffff | 0;
+  const d2 = Math.random() * 0xffffffff | 0;
+  const d3 = Math.random() * 0xffffffff | 0;
+
+  return lut[d0 & 0xff] + lut[d0 >> 8 & 0xff] + lut[d0 >> 16 & 0xff] + lut[d0 >> 24 & 0xff] + '-' +
+    lut[d1 & 0xff] + lut[d1 >> 8 & 0xff] + '-' + lut[d1 >> 16 & 0x0f | 0x40] + lut[d1 >> 24 & 0xff] + '-' +
+    lut[d2 & 0x3f | 0x80] + lut[d2 >> 8 & 0xff] + '-' + lut[d2 >> 16 & 0xff] + lut[d2 >> 24 & 0xff] +
+    lut[d3 & 0xff] + lut[d3 >> 8 & 0xff] + lut[d3 >> 16 & 0xff] + lut[d3 >> 24 & 0xff];
+};

test/uuid.test.js

@@ -0,0 +1,5 @@
+import Test from 'ava';
+
+Test('generates', t => {
+  t.truthy(true);
+});