题目一:var arr = [ '100px', 'abc'-6, [], -98765, 34, -2, 0, '300', , function(){alert(1);}, null, document, [], true, '200px'-30,'23.45元', 5, Number('abc'), function(){ alert(3); }, 'xyz'-90 ]; 1.找到arr里所有的数字:-98765, 34, -2, 0, 5 2.找到可以转成数字的:'100px', -98