Update 'bash/README.md'

bash/README.md

@@ -4,6 +4,10 @@
 
 Handling command line argument / parameter parsing at the beginning of a script.
 
+## array_append.bash
+
+How to declare an array, append new elements, iterate over the array for processing.
+
 ## booleans.bash
 
 BASH doesn't actually have booleans, but there's tricks to make variables behave enough like bools to be useful.