Avoid confusing prototype methods for static methods

Correct: `Array.from()` (it’s a static method)
Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method)

This patch uses the common `#` syntax to denote `.prototype.`.

snippets/sdbm.md

@@ -2,7 +2,7 @@
 
 Hashes the input string into a whole number.
 
-Use `String.split('')` and `Array.reduce()` to create a hash of the input string, utilizing bit shifting.
+Use `String.prototype.split('')` and `Array.prototype.reduce()` to create a hash of the input string, utilizing bit shifting.
 
 ```js
 const sdbm = str => {