html/rainbow/rainbow.js
function _intersects(start1, end1, start2, end2) {
        if (start2 >= start1 && start2 < end1) {
            return true;
        }

        return end2 > start1 && end2 < end1;
    }
function _intersects(start1, end1, start2, end2) {
        if (start2 >= start1 && start2 < end1) {
            return true;
        }

        return end2 > start1 && end2 < end1;
    }
function _intersects ( start1 , end1 , start2 , end2 ) { if ( start2 >= start1 && start2 < end1 ) { return true ; } return end2 > start1 && end2 < end1 ; }
determines if a new match intersects with an existing one

@param {number} start1    start position of existing match
@param {number} end1      end position of existing match
@param {number} start2    start position of new match
@param {number} end2      end position of new match
@returns {boolean}
determines if a new match intersects with an existing one