CMD:duel(playerid, params[])
{
    if ( sscanf( params, "udi", params[ 0 ], params[ 1 ] ) )
        return SendUsage(playerid, "/duel [playerid] [weapon name/ID]");

CMD:duel(playerid, params[])
{
    new targetid, weaponid;
    if ( sscanf( params, "ud", targetid, weaponid ) )
        return SendUsage(playerid, "/duel [playerid] [weapon name/ID]");

CMD:duel(playerid, params[])
{
    new targetid, weapon;
    if ( sscanf( params, "us[126]", targetid, weapon ) )
        return SendUsage(playerid, "/duel [playerid] [weapon name/ID]");

CMD:duel(playerid, params[])
{
* * if ( sscanf( params, "udu", params[ 0 ], params[ 1 ] ) )
* * * * return SendUsage(playerid, "/duel [playerid] [weapon name/ID]");

/*----------------------------------------------------------------------------*-
Function:
	sscanf
Params:
	string[] - String to extract parameters from.
	format[] - Parameter types to get.
	{Float,_}:... - Data return variables.
Return:
	0 - Successful, not 0 - fail.
Notes:
	A fail is either insufficient variables to store the data or insufficient
	data for the format string - excess data is disgarded.
 
	A string in the middle of the input data is extracted as a single word, a
	string at the end of the data collects all remaining text.
 
	The format codes are:
 
	c - A character.
	d, i - An integer.
	h, x - A hex number (e.g. a colour).
	f - A float.
	s - A string.
	z - An optional string.
	pX - An additional delimiter where X is another character.
	'' - Encloses a litteral string to locate.
	u - User, takes a name, part of a name or an id and returns the id if they're connected.
 
	Now has IsNumeric integrated into the code.
 
	Added additional delimiters in the form of all whitespace and an
	optioanlly specified one in the format string.
-*----------------------------------------------------------------------------*/