Add Clamp To An Endless Range as a Ruby TIL

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1548 TILs and counting..._
+_1549 TILs and counting..._
 
 ---
 
@@ -1217,6 +1217,7 @@ _1548 TILs and counting..._
 - [Check If A URL Resolves To 200](ruby/check-if-a-url-resolves-to-200.md)
 - [Check If An Object Includes A Module](ruby/check-if-an-object-includes-a-module.md)
 - [Check Return Status Of Running A Shell Command](ruby/check-return-status-of-running-a-shell-command.md)
+- [Clamp To An Endless Range](ruby/clamp-to-an-endless-range.md)
 - [Click On Text With Capybara](ruby/click-on-text-with-capybara.md)
 - [Colorful Output With MiniTest](ruby/colorful-output-with-minitest.md)
 - [Comparing Class Hierarchy Relationships](ruby/comparing-class-hierarchy-relationships.md)

ruby/clamp-to-an-endless-range.md

@@ -0,0 +1,22 @@
+# Clamp To An Endless Range
+
+The
+[`Comparable#clamp`](https://ruby-doc.org/3.3.6/Comparable.html#method-i-clamp)
+method allows us to specify the bounds of a value we want. If the target value
+is between the bounds, then we get that value. Otherwise, we gets the nearest
+end of the bounds.
+
+We can even pass a range to `#clamp` instead of separate lower and upper bound
+values. Because Ruby has beginless and endless ranges, this gives us the
+ergonomics to, say, clamp to any non-negative value with a `0..` endless range.
+
+Here is what that looks like:
+
+```ruby
+> 22.clamp(0..)
+=> 22
+> (-33).clamp(0..)
+=> 0
+> 0.clamp(0..)
+=> 0
+```