rem: var els = [], n = this.elements.length, k = n, i; do { i = k - n; 
add: var els = [], n = this.elements.length; for (var i = 0; i < n; i++) { 
context:   diagonal: function() {    if (!this.isSquare) { return null; }    var els = [], n = this.elements.length, k = n, i;    do { i = k - n;      els.push(this.elements[i][i]);    } while (--n);    return Vector.create(els);  },
meta: 3877	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/3877/5bb35ddb3516d7e68f3747d86540ffaa68de3fe3/matrix.js/buggy/src/matrix.js