Initial data commit

Task/Collections/UNIX-Shell/collections-1.sh

@@ -0,0 +1,9 @@
+a_index=(one two three)           # create an array with a few elements
+a_index+=(four five)              # append some elements
+a_index[9]=ten                   # add a specific index
+for elem in "${a_index[@]}"; do   # interate over the elements
+    echo "$elem"
+done
+for idx in "${!a_index[@]}"; do   # interate over the array indices
+    printf "%d\t%s\n" $idx "${a_index[idx]}"
+done