用javascript文件中的AngularJS过滤数组

Question

I've got an array. If someone reserve a table, reserve in the array is set to true.

$rootScope.tafels = [
    {id: 0, text:'table 2a, 4 persons.', reserve:false}, 
    {id: 1, text:'table 3b, 8 persons.', reserve:false}
];

And I've got an function for returning the length of the array:

$rootScope.getTotaalTafels = function()
    { return $rootScope.tafels.length; };

Now the difficult part that I can not solve, maybe you can:

I want to return the total tables that are not reserved, with my function showed above. How do I apply a filter to it?

Answer 1

Javascript 1.6 implements the filter function which allows exactly this:

$rootScope.getTotaalTafels = function(){
    return $rootScope.tafels.filter(function(value,index){
        return !value.reserve;
    }).length;
};

If you need to support older browsers there is a backward compatible function implementing this behaviour available here .

Answer 2

在最后一个AngularJS版本中使用$filter ;）