rails, getting syntax error with coffee script

i am trying to do an autocomplete feature in rails using the jquery ui library. however i keep getting syntax errors "Syntax Error: reserved word "function" on line ..." this is my lessons.js.coffee file ``` jQuery -> $(function() { function split( val ) { return val.split( /,\s*/ ); } function extractLast( term ) { return split( term ).pop(); } $( "#lesson_tag_name" ) // don't navigate away from the field on tab when selecting an item .bind( "keydown", function( event ) { if ( event.keyCode === $.ui.keyCode.TAB && $( this ).data( "autocomplete" ).menu.active ) { event.preventDefault(); } }) .autocomplete({ source: $('#lesson_tag_name').data('autocomplete-source') }, search: function() { // custom minLength var term = extractLast( this.value ); if ( term.length < 2 ) { return false; } }, focus: function() { // prevent value inserted on focus return false; }, select: function( event, ui ) { var terms = split( this.value ); // remove the current input terms.pop(); // add the selected item terms.push( ui.item.value ); // add placeholder to get the comma-and-space at the end terms.push( "" ); this.value = terms.join( ", " ); return false; } }); }); ``` i read online somewhere that i could replace the word function with -> i did that and i stopped receiving the function errors, but then i get other syntax errors such as "Syntax Error: reserved word "var" on line..." am i doing something wrong?