js 中的Array.map是什么意思答:循环遍历数组 要注意的是:原来数组不会发生变化,会返回一个新的数组。如:var array = [3,5,7,9];//将所有元素+1var result = array.map(function(item,index,array){ return item+1;});console.log(result);//logs [4,6,8,10]console.log(array);//logs [3,5,7,9]
js 遍历json数组,返回的json数组不是键值对形式的,如何遍历?答:数组遍历很简单啊,不过楼主应该是想命名后遍历吧 var data = [ [3, "1", "[email protected]", "Mac", 1, 25, 1231231233, "1"], [2, "1", "[email protected]", "Mac", 1, 25, 1231231222, "1"]], i = 0, line, o = {}, keys = ['a', 'b', 'c', 'd', 'e',...