AngularJSでng-repeatした要素ごとに独立した処理を実行させる ref: http://qiita.com/kazuph/items/c098cd75b1208fcc2a85

file0.html

<div ng-controller="myController">
    <div ng-repeat="f in forms">
        {{f}} 
        <input ng-model="data[f]" ng-keyup="doChange(f)">
        {{dataTimes[f]}}
    </div>
</div>

file1.js

var myApp = angular.module('myApp', []);
myApp.controller('myController', ['$scope', function($scope) {
    $scope.forms = {
        0: "hoge",
        1: "fuga",
        2: "piyo"
    };
    $scope.data      = {};
    $scope.dataTimes = {};
    $scope.doChange = function(f){
        console.log($scope.data);
        $scope.dataTimes[f] = $scope.data[f] * 3;
    };
}]);