[Fix #249] Add documentation for helper

modules/helper/README.md

@@ -1,14 +1,18 @@
-Trap
-====
+Helper
+======
 
-Provides for trapping UNIX signals and calling callback functions when a trap
-is triggered.
+Provides helper functions for developing modules.
 
 Functions
 ---------
 
   - `add-zsh-trap` adds a function name to a list to be called when a trap is
     triggered.
+  - `is-autoloadable` checks if a file can be autoloaded by trying to load it
+    in a subshell.
+  - `is-callable` checks if a name is a command, function, or alias.
+  - `is-true` checks a boolean variable for "true".
+  - `coalesce` prints the first non-empty string in the arguments array.
 
 Authors
 -------

modules/helper/init.zsh

@@ -10,7 +10,7 @@ function is-autoloadable {
   ( unfunction $1 ; autoload -U +X $1 ) &> /dev/null
 }
 
-# Checks a name if it is a command, function, or alias.
+# Checks if a name is a command, function, or alias.
 function is-callable {
   (( $+commands[$1] )) || (( $+functions[$1] )) || (( $+aliases[$1] ))
 }