Check for Perl Module

Sometimes you’ll need to decide on a course of action depending on the presence of a certain module.

• The way you’d usually pull in a module:

  use MODULE qw(SYMBOLS);
  

• Instead of pulling in the module:

  eval "use MODULE";
  if (not $EVAL_ERROR) { # use English: $@ -> $EVAL_ERROR
      require MODULE;
    import MODULE qw(SYMBOLS);
  }