javascript - I want the elements which are in sequence (1,2,3) (6,7) (10,11) (15,16,17). separately -

am having following array:arrtooth

var arrtooth = tooth.split('|'); 

it gets value

arrtooth=[1,2,3,6,7,10,11,15,16,17]; 

i want elements in sequence (1,2,3) (6,7) (10,11) (15,16,17). separately.my code in jquery.i want actual logic.

if output 3 2 2 3 in array fine or if have thing (output) can elaborate sequence ok.

var arrtooth = [1, 2, 3, 6, 7, 10, 11, 15, 16, 17]; var last = arrtooth[0]; var result = []; count = 1; (var = 1; < arrtooth.length; i++) {     if (arrtooth[i] == (last + 1)) {         count++;      } else {         result.push(count);         count = 1;     }     last = arrtooth[i]; } result.push(count); 

jsfiddle example