3 ms·
More precisely && and || are meant to stand in boolean tests, whereas and and or are meant to tie expressions together DSL style, as an alternative to if/then,
by lloeki 14y ago
More precisely && and || are meant to stand in boolean tests, whereas and and or are meant to tie expressions together DSL style, as an alternative to if/then, like so:
@current_user.logged_in? or redirect_to login_path
@current_user.can? :do_this or render :status => 403
shirt.blue? and return bar
put_suit_on or put_pants_on
- graywh 14y agoThat's a good example shirt.blue? and return bar would be equivalent to return bar if shirt.blue? You can do the same with or and unless.
- philwelch 14y agoI find the postfix if and unless far more readable than the Perlish and and or operators. The "or die" construction for asserts is really amusing though.