Add Uninstall Specific Version Of A Ruby Gem 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://tinyletter.com/jbranchaud).
 
-_1048 TILs and counting..._
+_1049 TILs and counting..._
 
 ---
 
@@ -896,6 +896,7 @@ _1048 TILs and counting..._
 - [Turning Things Into Hashes](ruby/turning-things-into-hashes.md)
 - [Uncaught Exceptions In Pry](ruby/uncaught-exceptions-in-pry.md)
 - [`undef_method` And The Inheritance Hierarchy](ruby/undef-method-and-the-inheritance-hierarchy.md)
+- [Uninstall Specific Version Of A Ruby Gem](ruby/uninstall-specific-version-of-a-ruby-gem.md)
 - [Unpacking Strings Into Binary](ruby/unpacking-strings-into-binary.md)
 - [Up And Down With Integers](ruby/up-and-down-with-integers.md)
 - [Use A Case Statement As A Cond Statement](ruby/use-a-case-statement-as-a-cond-statement.md)

ruby/uninstall-specific-version-of-a-ruby-gem.md

@@ -0,0 +1,27 @@
+# Uninstall Specific Version Of A Ruby Gem
+
+I have two versions of `bundler` installed on my machine—`2.2.4` and `2.2.10`.
+When I check the version of bundler, I see it references the latest one.
+
+```bash
+$ bundle --version
+Bundler version 2.2.10
+```
+
+I want to get rid of `2.2.10` so that I can use `2.2.4` instead. This can be
+done by uninstalling that specific version of `bundler`.
+ 
+To do this, specify the `-v` flag when running `gem uninstall`.
+
+```bash
+$ gem uninstall bundler -v 2.2.10
+Successfully uninstalled bundler-2.2.10
+$ bundle --version
+Bundler version 2.2.4
+```
+
+Alternatively, if you want to use a different version of a gem without
+uninstalling the primary version, you can [specify the version after the gem
+name when calling it](run-an-older-version-of-bundler.md).
+
+[source](https://stackoverflow.com/questions/23887726/rails-uninstall-specific-version-of-a-library-using-gem)