Drupal’s Devel module provides a wide range of functionalities that make a Drupal developer’s life much saner. Of these, the most useful one is the function dpm() which seems to have a twin clone - dsm().
For those who are unaware, dpm() is a highly useful function for neatly printing (pretty printing) arrays/objects etc in drupal. There is also a function dsm() in the devel module, which seems to do the same thing.
Then which is the correct one?