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Thread: Need Help In Writing A Specific Randomizing Function

  1. #1
    Join Date
    Jan 2007

    Need Help In Writing A Specific Randomizing Function

    Hi all.

    I'm new to javascript. I learned C several years ago but haven't actually programmed anything for a long time.

    I'm trying to create a function that will output an array of 12 strings in:
    1)Random order
    2)no repating numbers
    3)sequential numbers

    for example, these two are bad outputs for me:
    "1, 2, 7, 3" etc. and also "1,5,8,1" etc.

    Hope I'm clear enough. I tried using some info on the site, but couldn't find something that combines both "restrictions" and I wasn't able to fill the holes myself.

    Thx in advance, ZBBZ.

  2. #2
    Join Date
    Mar 2009
    1. create a function that generates one of your four numbered units as an array
    2. create a function that checks for consecutive numbers in the array--returns true if so
    3. create a function that checks for repeats in the array --returns true if so
    4. create a function that turns the array into a string
    declare an array to hold your strings-- we'll call it ARR

    create a while loop that will loop until 12 strings have been found--like
    ARR = [];
    var tmp;
    while(ARR.length < 12){

    tmp = fnc1(); //got random array
    if(fnc2(tmp)){continue;} // if it was no good--try again--go to the beginning of the loop
    if(fnc3(tmp)){continue;} // same as above
    //if it gets here, its good
    tmp = fnc(4) //convert to a string
    //now check to make sure its not a duplicate
    if(ARR.indexOf(tmp) == -1){

    There's the logic for you. Now write the functions for your homework yourself.

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