Add Random Cannot Be Seeded As a javascript til

Author: jbranchaud

README.md

@@ -109,6 +109,7 @@ _318 TILs and counting..._
 - [Character Codes from Keyboard Listeners](javascript/character-codes-from-keyboard-listeners.md)
 - [Create An Array Containing 1 To N](javascript/create-an-array-containing-1-to-n.md)
 - [Enable ES7 Transforms With react-rails](javascript/enable-es7-transforms-with-react-rails.md)
+- [Random Cannot Be Seeded](javascript/random-cannot-be-seeded.md)
 - [Splat Arguments To A Function](javascript/splat-arguments-to-a-function.md)
 - [Throttling A Function Call](javascript/throttling-a-function-call.md)
 - [Transforming ES6 and JSX With Babel 6](javascript/transforming-es6-and-jsx-with-babel-6.md)

javascript/random-cannot-be-seeded.md

@@ -0,0 +1,14 @@
+# Random Cannot Be Seeded
+
+In JavaScript, you can use `Math.random()` to get a *sorta* random value.
+
+```javascript
+> Math.random()
+0.5130641541909426
+```
+
+Most programming languages give you a method of seeding the random number
+generator for determinism. Unfortunately, JavaScript provides no way for
+choosing or resetting the seed to `Math.random()`.
+
+[source](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random)