angularjs如何在ng-repeat过程中控制字符串长度超过指定长度后面内容以省略号显示

angular.module('ng').filter('cut', function () {
return function (value, wordwise, max, tail) {
if (!value) return '';

max = parseInt(max, 10);
if (!max) return value;
if (value.length <= max) return value;

value = value.substr(0, max);
if (wordwise) {
var lastspace = value.lastIndexOf(' ');
if (lastspace != -1) {
value = value.substr(0, lastspace);
}
}

return value + (tail || ' …');
};
});

{{some_text | cut:true:100:' ...'}}