js_language_arr_ordering

var korean = [ "다", "나", "가" ]; 

function ascending ( a , b ) {        
        return a.localeCompare ( b ); 
} 

function descending ( a , b ) { 
        return b.localeCompare ( a ); 
} 

 console.log('asc: '+korean.sort(ascending));
 console.log('desc: '+korean.sort(descending));