Add Find The Min And Max With A Single Call as a ruby til

ruby/find-the-min-and-max-with-a-single-call.md

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+# Find The Min And Max With A Single Call
+
+Ruby's Enumerable comes with the `#min` and `#max` methods for finding,
+respectively, the minimum and maximum value in the target collection.
+
+If you wanted to find both the min and the max of the same collection, you
+could call them one after another.
+
+```ruby
+list = [3,7,4,15,9,1,2]
+
+list.min
+#=> 1
+list.max
+#=> 15
+```
+
+Ruby's Enumerable also supports a slightly more efficient way -- it finds both
+at the same time when you call
+[`#minmax`](https://apidock.com/ruby/Enumerable/minmax).
+
+```ruby
+list = [3,7,4,15,9,1,2]
+#=> [1,15]
+```