如何通过反射获取对象中的字段？(How to get the fields in an Object via reflection?)

 您可以像这样设置一个cookie： 
 
cookies[:welcomed] = {:value => true, :expires => Time.now + 6.months}
 
 并从jquery做一个小功能 
 
function readCookie(name) {
    var nameEQ = name + "=", ca = document.cookie.split(';');
    for (var i = 0; i < ca.length; i += 1) {
        var c = ca[i];
        while (c.charAt(0) === ' ') { 
            c = c.substring(1, c.length);
        }
        if (c.indexOf(nameEQ) === 0) {
            return c.substring(nameEQ.length, c.length);
        }
    }
    return null;
}
 
 并称之为#in js 
 
  if (readCookie('welcomed') == null){}

You can set a cookie like this:
 
cookies[:welcomed] = {:value => true, :expires => Time.now + 6.months}
 
and from jquery make a wee function
 
function readCookie(name) {
    var nameEQ = name + "=", ca = document.cookie.split(';');
    for (var i = 0; i < ca.length; i += 1) {
        var c = ca[i];
        while (c.charAt(0) === ' ') { 
            c = c.substring(1, c.length);
        }
        if (c.indexOf(nameEQ) === 0) {
            return c.substring(nameEQ.length, c.length);
        }
    }
    return null;
}
 
and call it #in js 
 
  if (readCookie('welcomed') == null){}