从阵列中获取ID，存储它并将其从本地删除

我正在构建一个Angular/Javascript/Ionic/Cordova应用程序。从阵列中获取ID，存储它并将其从本地删除

我有一个功能，其中我所说的下面阵列被存储作为变量（existingEntries）

categories: Array [276] 
[0...99] 
    0: Object 
    id: 288 
    exclude: false 
    1: Object 
    id: 320 
    exclude: true

该函数检索所有阵列中的元件，以查看是否值排除被设置为真或假

var existingEntries = $scope.categoryList; 
    if(existingEntries == null) existingEntries = []; 
     for (var i = 0; i < existingEntries.length; i++) { 
      if (existingEntries[i]['exclude'] == true) { 
       $scope.addLocalExcludedCategories(i); 
      } else if (existingEntries[i]['exclude'] == false) { 
       $scope.removeLocalExcludedCategories(i); 
      }      
    }

一旦完成了其他相关函数（addLocal ..和remove Local ...）被调用来存储id的。下面是addLocal ..函数，它可以工作，但是当我反复运行这些代码时，我得到了重复，并且我确信它可以更好地编码。我正在使用localstorage，因为我需要将数组保存到本地，但如果您有其他解决方案，那将非常棒。

$scope.addLocalExcludedCategories = function(catID) { 
    console.log("addLocalExcludedCategories Called") 
    //Add Item to Excluded Categories Variable 
    var existingEntries = JSON.parse(window.localStorage.getItem("ExcludedCategories"));        
    if(existingEntries == null) existingEntries = []; 

    var entryId = catID; 
    var entry = { 
     'id': entryId, 
    }; 
    existingEntries.push(entry);   

    window.localStorage.setItem("ExcludedCategories", JSON.stringify(existingEntries)); 
    $scope.ExcludedCategories = window.localStorage.getItem("ExcludedCategories");  
}

此外，这里是删除功能，因为我发现ID的排除值设置为true，而不是假的预期工作。

$scope.removeLocalExcludedCategories = function(catID) {  
console.log("removeLocalExcludedCategories Called") 
    //Remove Item to Excluded Categories Variable 
    var existingEntries = JSON.parse(window.localStorage.getItem("ExcludedCategories")); 
    if(existingEntries == null) existingEntries = []; 

    for (var i = 0; i < existingEntries.length; i++) { 
     if (existingEntries[i]['id'] == catID) { 
      console.log(i); 
      existingEntries.splice(i, 1); 
     } 
    } 
    //console.log("Remove Categories >>>"); 
    //console.log(existingEntries); 
    window.localStorage.setItem("ExcludedCategories", JSON.stringify(existingEntries)); 
    $scope.ExcludedCategories = window.localStorage.getItem("ExcludedCategories"); 
    console.log($scope.ExcludedCategories); 
}

希望这是有道理的，并提前感谢！

来源

2016-07-27 Jason

如果已经在existingEntries阵存在的条目，这就是为什么你正在愚弄 试试这个代码你是不是检查...

$scope.addLocalExcludedCategories = function(catID) { 
    console.log("addLocalExcludedCategories Called") 
    //Add Item to Excluded Categories Variable 
    var existingEntries = JSON.parse(window.localStorage.getItem("ExcludedCategories")) || []; 

    var entryId = catID; 
    var entry = { 
     'id': entryId, 
    }; 
    if(existingEntries.length > 0){ 
    existingEntries.forEach(function(entry){ 
    if(entry.id !== entry.id){ 
     existingEntries.push(entry); 
    } 
    });

来源

2016-07-27 15:11:59

想通了与NG-如果声明并通过在本地存储数组然后解析它在调用中。

$scope.ifCatExcludedTerms = function(sent_id){ 
    var doesNotExist = true; 
    arraytosearch = JSON.parse(localStorage.getItem("categoryListMem")); 
    //console.log (sent_id); 
     for (var i = 0; i < arraytosearch.length; i++) { 
      if (arraytosearch[i]['id'] == sent_id) { 
       doesNotExist = false; 
      } 
     } 
    return doesNotExist; 
}

来源

2016-07-31 13:45:26 Jason

从阵列中获取ID，存储它并将其从本地删除

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