insert section 'Toggle options'

Examples.md

@@ -136,6 +136,53 @@ builtin bind -x '"\C-x1": __fzf_history';
 builtin bind '"\C-r": "\C-x1\e^\er"'
 ```
 
+### Toggle options
+
+```sh
+# Toggle bash options (set and shopt)
+
+BOLD=$(tput bold || tput md)
+#RESET=$(tput sgr0 || tput me)
+GREEN=$(tput setaf 2 || tput AF 2)
+RED=$(tput setaf 1)
+#WHITE=$(tput setaf 7 || tput AF 7)
+
+while read -r b o n _
+do
+    case $b in
+        shopt)
+            if [[ $o == -u ]]
+            then
+                shopt -s "$n"
+            else
+                shopt -u "$n"
+            fi
+        ;;
+        set)
+            if [[ $o == \+o ]]
+            then
+                set -o "$n"
+            else
+                set +o "$n"
+            fi
+        ;;
+    esac
+done < <(
+     < <(shopt -p ; shopt -op) sed "
+        / -[so] / {
+            s/$/ ${BOLD}${GREEN}enabled/;
+            b return
+        }; {
+            s/$/ ${BOLD}${RED}disabled/;
+        };
+        : return;
+    " |
+    sort -k 3 |
+    column -t |
+    fzf --ansi --multi --with-nth=3.. --tiebreak=begin
+)
+```
+
 ### Processes
 
 ```sh