Javascript: Compare three arrays -

i want compare many arrays , combine identical:

a = [1,2,3]; b = [1,2,3]; c = [1,2,3];  d = [10,11,12]; e = [10,11,12]; f = [10,11,12];  g = [13,14]; h = [13,14]; 

if there identical arrays i'd create new arrays out of identical ones:

i = [1,2,3]; j = [10,11,12]; k = [13,14]; 

would need iterate through each element in 1 array against of elements in other arrays?

for (var in a) {     (var j in b) {         if (a[i] == j[j]) {             // create new arrays         }     } } 

etc...

then, create new arrays out of matches? sounds lot of overhead.

what's best way accomplish this?

thanks!

if you're trying finish unique arrays, use hash approach:

var myarrays = [a,b,c,d,e,f,g],     uniques = [],     hashes = {};  (var i=0; < myarrays.length; i++) {     var hash = json.stringify(myarrays[i]); // or .tostring(), or whatever     if (!(hash in hashes)) {         hashes[hash] = true;         uniques.push(myarrays[i]);     } } // uniques holds unique arrays