Add Saying Yes as a zsh til.

README.md

@@ -128,6 +128,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Clear The Screen](zsh/clear-the-screen.md)
 - [Create A File Descriptor with Process Substitution](zsh/create-a-file-descriptor-with-process-substitution.md)
 - [Killing A Frozen SSH Session](zsh/killing-a-frozen-ssh-session.md)
+- [Saying Yes](zsh/saying-yes.md)
 - [Search History](zsh/search-history.md)
 - [Switch Versions of a Brew Formula](zsh/switch-versions-of-a-brew-formula.md)
 - [Watch This Run Repeatedly](zsh/watch-this-run-repeatedly.md)

zsh/saying-yes.md

@@ -0,0 +1,19 @@
+# Saying Yes
+
+Tired of being prompted for confirmation by command-line utilities? Wish you
+could blindly respond 'yes' to whatever it is they are bugging you about?
+The `yes` command is what you've been looking for.
+
+```
+$ yes | rm -r ~/some/dir
+```
+
+This will respond `y` as `rm` asks for confirmation on removing each and
+every file in that directory.
+
+`yes` is just as good at saying *no*. Give it `no` as an argument and it
+will happily (and endlessly) print `no`.
+
+```
+$ yes no
+```