Loading

LFE provides several ways to load pre-compiled modules into your REPL session.

Using l (Load Module)

The l function loads or reloads a specific module:

lfe> (l 'my-module)
#(module my-module)

This is useful when:

• You've recompiled a module and want to reload it
• You want to load a module that exists but isn't currently loaded
• You're working with hot code reloading during development

Using code:ensure_loaded

For more control over the loading process, you can use Erlang's code server directly:

lfe> (code:ensure_loaded 'my-module)
#(module my-module)

This function:

• Loads the module if it's not already loaded
• Does nothing if the module is already loaded
• Returns error information if the module can't be found

Checking Module Status

You can check what modules are currently loaded and get information about them:

;; List all loaded modules
lfe> (m)

;; Get information about a specific module
lfe> (m 'lists)

;; Check if a module is loaded
lfe> (code:is_loaded 'my-module)
#(file "/path/to/my-module.beam")

Hot Code Reloading

During development, you can reload modules without restarting the REPL:

;; Edit and recompile your module file
lfe> (c "my-module.lfe")
#(module my-module)

;; The module is automatically reloaded with new code
lfe> (my-module:updated-function)