diff --git a/document/linux/config/bash/module/autocomplete.sh b/document/linux/config/bash/module/autocomplete.sh
index e6cad74..1d4beed 100644
--- a/document/linux/config/bash/module/autocomplete.sh
+++ b/document/linux/config/bash/module/autocomplete.sh
@@ -1,13 +1,8 @@
 # bash autocomplete.
-# usage: complete -F _foo foo
+# usage: _foo () { autocomplete "{foo,bar}" } ; complete -F _foo foo
 # there are also options like -o nospace. see man for more info.
+# from man: The shell function function is executed in the current shell environment. When the function is executed, the first argument ($1) is the name of the command whose arguments are being completed, the second argument ($2) is the word being completed, and the third argument ($3) is the word preceding the word being completed on the current command line. When it finishes, the possible completions are retrieved from the value of the COMPREPLY array variable.
 autocomplete()
 {
-  local commands="$@"
-  local cur prev
-  
-  COMPREPLY=()
-  cur="${COMP_WORDS[COMP_CWORD]}"
-  COMPREPLY=( $(compgen -W "${commands}" -- ${cur}) )
-  return 0
+  COMPREPLY=( $(compgen -W "${@}") )
 }