Else-Klausel in For-Schleife schreibt Wert in Array

Question

Aus irgendeinem Grund schreibt die Else-Klausel in meinem bedingten den Wert im Array neu, auch wenn es eine Übereinstimmung findet. Irgendeine Idee, warum das passiert? Code unten:

controller.js

$scope.allAds = DummyAdService.dummyAds; 
    $scope.allStatements = DummyStatementsService.dummyStatements; 

    for(var i=0; i < $scope.allStatements.length; i++) { 
     var statement = $scope.allStatements[i]; 
     for(var j=0; j < $scope.allAds.length; j++) { 
      var ad = $scope.allAds[j]; 
      if(statement.statement.toLowerCase().indexOf(ad.tag) > -1) { 
       statement.ad = ad.url; 
      } else { 
       var randomAd = $scope.allAds[Math.floor(Math.random() * $scope.allAds.length)]; 
       statement.ad = randomAd.url; 
      } 
     } 
    }; 

services.js

function DummyStatement(id, accountId, reportId, timestamp, rating, statement, url) { 
    this.id = id; 
    this.accountId = accountId; 
    this.reportId = reportId; 
    this.timestamp = timestamp; 
    this.rating = rating; 
    this.statement = statement; 
    this.url = url; 
} 

function DummyStatementsService(DummyAccountService) { 
    this.dummyStatements = [ 
     new DummyStatement(1, 1, 1, 1449635098000, 'pos', 
      'Time to visit my second home. Gym haha'), 
     new DummyStatement(2, 1, 1, 1449615098000, 'pos', 
      'Feeling so much better after 10 hours sleep'), 
     new DummyStatement(3, 1, 1, 1440615028000, 'pos', 
      'Excited about going to Thorpe Park tomorrow'), 
    new DummyStatement(16, 2, 1, 1449635098000, 'neg', 
      'What a terrible week it\'s been so far. Weekend can\'t come soon enough'), 
     new DummyStatement(17, 2, 1, 1449615098000, 'neg', 
      'Rain rain rain go away. We all want some sunshine'), 
     new DummyStatement(18, 2, 1, 1440615028000, 'neg', 
    ] 
} 

function DummyAd(id, tag, url) { 
    this.id = id; 
    this.tag = tag; 
    this.url = url; 
} 

function DummyAdService() { 
    this.dummyAds = [ 
     new DummyAd(1, "gym", "ad-gym.jpg"), 
     new DummyAd(2, "sleep", "ad-sleep.jpg"), 
     new DummyAd(3, "thorpe park", "ad-themepark.jpg"), 
    ] 
} 

Answer 1

es durch statement = $scope.allStatements[i+1] Zugabe wurde behoben.

if(statement.statement.toLowerCase().indexOf(ad.tag) > -1) { 
    statement.ad = ad.url; 
    statement = $scope.allStatements[i+1]; 
} else if(statement.statement.toLowerCase().indexOf(ad.tag) === -1) { 
    var randomAd = $scope.allAds[Math.floor(Math.random() * $scope.allAds.length)]; 
    statement.ad = randomAd.url; 
}