CFLib.org – Common Function Library Project

Description:
If ALL elements of a list X is found in a list Y, the function returns TRUE (yes) otherwise it'll return FALSE (no). Also allows for 'matchany' functionality which will allow for any match of X in Y.

Return Values:
Returns a boolean.

Example:

<cfset l1 = "apples,oranges">
<cfset l2 = "apples,bananas,oranges">
<cfset l3 = "apples@zebras">
<cfoutput>
Is all of #l1# in #l2#? #isListInList(l1,l2)#<br>
Is all of #l1# in #l3#? #isListInList(l1,l3,",","@")#<br>
</cfoutput>

<cfif isListInList("sm,m,l,xl","l,xl,sm",",",",",true)>
Show Prodcut
<cfelse>
Don't show product
</cfif>

Parameters:

Full UDF Source:

/**
 * Checks is all elements of a list X is found in a list Y.
 * v2 by Raymond Camden
 * v3 idea by Bill King
 * v4 fix by Chris Phillips
 * 
 * @param l1      The first list. (Required)
 * @param l2      The second list. UDF checks to see if all of l1 is in l2. (Required)
 * @param delim1      List delimiter for l1. Defaults to a comma. (Optional)
 * @param delim2      List delimiter for l2. Defaults to a comma. (Optional)
 * @param matchany      If true, UDF returns true if at least one item in l1 exists in l2. Defaults to false. (Optional)
 * @return Returns a boolean. 
 * @author Daniel Chicayban (dbastos@math.utoledo.edu) 
 * @version 4, September 4, 2008 
 */
function isListInList(l1,l2) {
    var delim1 = ",";
    var delim2 = ",";
    var i = 1;
    var matchany = false;
    
    if(arrayLen(arguments) gte 3) delim1 = arguments[3];
    if(arrayLen(arguments) gte 4) delim2 = arguments[4];
    if(arrayLen(arguments) gte 5) matchany = arguments[5];
    
    for(i=1; i lte listLen(l1,delim1); i=i+1) {
        if(matchany and listFind(l2,listGetAt(l1,i,delim1),delim2)) return true;
        if(not matchany and not listFind(l2,listGetAt(l1,i,delim1),delim2)) return false;
    }
    return not matchany;
}