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/pick.md

@@ -2,7 +2,7 @@
 
 Picks the key-value pairs corresponding to the given keys from an object.
 
-Use `Array.reduce()` to convert the filtered/picked keys back to an object with the corresponding key-value pairs if the key exists in the object.
+Use `Array.prototype.reduce()` to convert the filtered/picked keys back to an object with the corresponding key-value pairs if the key exists in the object.
 
 ```js
 const pick = (obj, arr) =>