updated readme with brief descriptions of each tool

README.MD

@@ -27,6 +27,18 @@ or
 ```
 it can also be run without any arguments to receive a i3bar compatible json string
 
+## Tools
+- `pingclock`   performs a single `ping` to a server and returns the response time
+- `battery`     shows the current battery level
+- `brightness`  shows the current backlight level and gives options to adjust it
+- `volume`      shows the current volume level and gives options to adjust and manage it
+- `date`        shows the date
+- `fuzzytime`   shows the fuzzytime clock
+- `wlan`        shows the state of the wireless network interface. SSID connected to and signal level.
+- `nic`         shows the status and/or the ip address of the network interface card
+- `temperature` shows the current CPU temperature
+- `notes`       a simple one liner note taking tool, displaying notes in dmenu/rofi
+
 Personally, I have these bound to key combinations in i3. In fact, I have a seperate `bindsym` mode in which all these tools are accessible i.e. `$mod+i` to get to "info" mode then `p` to show pingclock.  
   
 ## You can also set the volume and brightness levels by typing a numeric figure into the dmenu/rofi input box  

notes.nim

@@ -20,6 +20,7 @@ proc read_notes(): seq[string] =
 proc write_notes(notes: seq[string]) =
   try:
     let f = open(note_file, fmWrite)
+    defer: f.close()
     for note in notes:
       f.writeLine(note)
   except:
@@ -43,6 +44,16 @@ proc write_note(note: string) =
   except:
     echo "write_note, Unable to write note :", getCurrentExceptionMsg()
 
+proc replace_note(new_note: string, old_note: string) =
+  let notes = read_notes()
+  var new_notes: seq[string] = @[]
+  for a_note in notes:
+    if old_note == a_note:
+      new_notes.add(new_note)
+    else:
+      new_notes.add(a_note)
+  write_notes(new_notes)
+
 proc get_notes(): (Info, seq[string]) =
   var info = newInfo()
   info.title = "Notes :"
@@ -52,7 +63,7 @@ proc get_notes(): (Info, seq[string]) =
 proc display_option_menu(option: string) =
   var select = newInfo()
   select.title = "Note :"
-  let args = concat(@["option"],note_choices)
+  let args = concat(@[option],note_choices)
   let chosen = outputJSON(select,args)
   if chosen in note_choices:
     case chosen:
@@ -61,9 +72,11 @@ proc display_option_menu(option: string) =
         start_notes()
       of "back":
         start_notes()
-  else:
+  elif chosen != "" and chosen != option:
-    write_note(option)
+      replace_note(chosen, option)
       display_option_menu(chosen)
+  else:
+    display_option_menu(option)
 
 proc start_notes() =
   let (info,notes) = get_notes()