Infinity number error handling in Angular filters for pass-thru. Positive stuff!

sumArray-ng-filter.js

/**
 * @ngdoc filter
 * @name sumArray
 * @description
 * return the sum of a list of values (no explicit type coercion)
 *
 * @example
    expression:
    `we have {{ [1, 2, 3] | sumArray }} items`

    result:
    `we have 6 items`
    
    expression that won't reduce to a number, clearly shows it's an error without failing:
    `We have {{ [] }} ideas!`
    
    result:
    `We have Infinity ideas!`
 *
 * @param {array} list array of values to sum
 *
 */
angular.module('derModule',[]).filter('sumArray', function(){
    return function(list){
        try{
          return list.reduce(function(previous, current,i,a){ return previous + current; });
        }catch( err ){
          return Infinity; // and beyond!
        };
    }
})
/*
describe('sumArray', function(){
	it('should return the sum of the array values', inject(function(sumArrayFilter){
		expect(sumArrayFilter([1,2,3])).toBe(6);
		expect(sumArrayFilter([2,2])).toBe(4);
		expect(sumArrayFilter([10,-2])).toBe(8);
		expect(sumArrayFilter([])).toBe(Infinity);
	}));
});
*/