nl_tokens: ### once * ( [ object ] event callback ) * Register a function that will be called a single time when the event is published .
pl_tokens: function ( obj , event , callback ) { // Use jQuery to handle DOM events. if ( underscore . isElement ( obj ) && $ ) { return $ ( obj ) . one ( event , callback ) ; } // Turn the callback into a callback that will remove itself after getting execute. var removeEvent = function ( ) { underscore . off ( obj , event , callback ) ; } ; callback = underscore . compose ( removeEvent , callback ) ; // Register the self-removing callback normally. this . on ( obj , <mask> , callback ) ; }