Added average filter to math module

[benbakhar]

updated readme and added tests as well.

[a8m]

Hi @benbakhar, take a look on this example, or see: jsbin

 $scope.nums = [1,2,3,4,5,6,7,8,10]; $scope.scores = [ { name: 'Dan', score: 80 }, { name: 'Edd', score: 90 }, { name: 'Edi', score: 40 }, { name: 'Ari', score: 87 }, { name: 'Tod', score: 99 } ];

example1: <p>{{ (nums | sum) / nums.length }}</p> example2: <!-- your TODO :) --> <p>{{ ( scores | map: 'score' | sum ) / scores.length }}</p>

Thx for the PR, let me know what do you think...

[benbakhar]

Hey man,
i updated the filter according your second example. make more sense this way gn :)

[Adriien-M]

Hey,
I think this filter would be useful rather than to add a division...

[Delapouite]

Yes, this would be a helpful addition to this already awesome library.