object FuncIsDefined(object[] args)
{
if (!CheckArgCount(1, "isdefined", args))
{
return(null);
}
return(variables.IsDefined(args[0].ToString()));
}
/// <summary>
/// returns true if variable name is defined
/// otherwise returns parents isDefined if parent != null
/// </summary>
public bool IsDefined(string name)
{
if (values.ContainsKey(name))
{
return(true);
}
else if (parent != null)
{
return(parent.IsDefined(name));
}
else
{
return(false);
}
}
