CFLib.org – Common Function Library Project

Description:
This will generate the specified number of unique random numbers.

Return Values:
Returns an array.

Example:

<cfset myarray=randomGenerator(10,1,10)>
<cfdump var="#myarray#">

Parameters:

Full UDF Source:

/**
 * This will generate the specified number of unique random numbers.
 * 
 * @param count      Number of unique random numbers. (Required)
 * @param start      Lower range of random numbers. (Required)
 * @param end      Upper range of random numbers. (Required)
 * @return Returns an array. 
 * @author Srinivas.V.K (vksrinu@gmail.com) 
 * @version 1, December 1, 2006 
 */
function randomGenerator(count,start,end) {
    var myArray = arrayNew(1);
    var i = 0;
    var ran = 0;
            
    if((arguments.end-arguments.start+1) lt arguments.count) arguments.count = arguments.end-arguments.start+1;
    for(;arrayLen(myArray) lt arguments.count; i=i+1) {
        ran=randRange(arguments.start,arguments.end);
        //before appending random number to array,check the number in array
        if(not listFind(arrayToList(myArray),ran)) 
            arrayAppend(myArray,ran);
    }
    return myArray;
}