foreach 回调用法

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>test</title>
<script src="http://cdn.bootcss.com/angular.js/1.4.3/angular.min.js"></script>
</head>
<body>
<script type='text/javascript'>
var arr = ['a','b','c'];
angular.forEach(arr,function(value,index){
console.log(value);
if(index === arr.length - 1){
console.log(1);
}
});
</script>
</body>
</html>