從陣列中獲取ID，存儲它並將其從本地刪除

我正在構建一個Angular/Javascript/Ionic/Cordova應用程序。從陣列中獲取ID，存儲它並將其從本地刪除

我有一個功能，其中我所說的下面陣列被存儲作爲變量（existingEntries）

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

該函數檢索所有陣列中的元件，以查看是否值排除被設置爲真或假

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); 
      }      
    }

一旦完成了其他相關函數（addLocal ..和remove Local ...）被調用來存儲id的。下面是addLocal ..函數，它可以工作，但是當我反覆運行這些代碼時，我得到了重複，並且我確信它可以更好地編碼。我正在使用localstorage，因爲我需要將數組保存到本地，但如果您有其他解決方案，那將非常棒。

$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，這裏是刪除功能，因爲我發現ID的排除值設置爲true，而不是假的預期工作。

$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); 
}

希望這是有道理的，並提前感謝！

來源

2016-07-27 Jason

如果已經在existingEntries陣存在的條目，這就是爲什麼你正在愚弄 試試這個代碼你是不是檢查...

$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); 
    } 
    });

來源

2016-07-27 15:11:59

想通了與NG-如果聲明並通過在本地存儲數組然後解析它在調用中。

$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; 
}

來源

2016-07-31 13:45:26 Jason

從陣列中獲取ID，存儲它並將其從本地刪除

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