Selecting x number of unique random values from an array

Selecting x number of unique random values from an array - Printable Version

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+--- Thread: Selecting x number of unique random values from an array (/showthread.php?tid=421485)

Selecting x number of unique random values from an array - MP2 - 09.03.2013

Just wondering what the most efficient way of doing this is, because the only thing I can think of involves many loops.

I have an array with ~100 strings in. I want to randomly select 10 of them, without having the same one twice. What's the best way to do this?

Re: Selecting x number of unique random values from an array - Finn - 09.03.2013

pawn Код:

stock GetRandomRows(values[], amount, max_values = sizeof(values))
{
    if(max_values <= amount && values[0] == -1)
    {
        new i, i2, rand;
        while(i < max_values)
        {
            rand = random(amount);
            i2 = 0;
            while(i2 < max_values)
            {
                if(values[i2] == rand)
                {
                    rand = random(amount);

                    i2 = 0;
                    continue;
                }

                i2++;
            }

            values[i] = rand;
            i++;
        }
        
        return 1;
    }

    return 0;
}

pawn Код:

new values[10] = { -1, ... };
GetRandomRows(values, sizeof(strings_array));