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

README.md

@@ -9,7 +9,7 @@ and pairing with smart people at Hashrocket.
 
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-_973 TILs and counting..._
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@@ -785,6 +785,7 @@ _973 TILs and counting..._
 - [Expect A Method To Be Called And Actually Call It](ruby/expect-a-method-to-be-called-and-actually-call-it.md)
 - [FactoryGirl Sequences](ruby/factory-girl-sequences.md)
 - [Fail](ruby/fail.md)
+- [Find The Min And Max With A Single Call](ruby/find-the-min-and-max-with-a-single-call.md)
 - [Finding The Source of Ruby Methods](ruby/finding-the-source-of-ruby-methods.md)
 - [Generate A Signed JWT Token](ruby/generate-a-signed-jwt-token.md)
 - [Generate Ruby Version And Gemset Files With RVM](ruby/generate-ruby-version-and-gemset-files-with-rvm.md)

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

@@ -0,0 +1,25 @@
+# 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]
+```