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/minBy.md

@@ -2,7 +2,7 @@
 
 Returns the minimum value of an array, after mapping each element to a value using the provided function.
 
-Use `Array.map()` to map each element to the value returned by `fn`, `Math.min()` to get the maximum value.
+Use `Array.prototype.map()` to map each element to the value returned by `fn`, `Math.min()` to get the maximum value.
 
 ```js
 const minBy = (arr, fn) => Math.min(...arr.map(typeof fn === 'function' ? fn : val => val[fn]));