AngularJS不在数组中找到值

Question

I have a AngularJS app developed.

On a view I have a list of items - each with its own set of radio buttons. The list and buttons are built at run-time from an API call.

Both the list and radio buttons can be of any length eg list item 1 might contain 3 radio buttons while list item n might contain 2 radio buttons.

When the user selects a radio button I fire a ng-click method that sends both the list ID as well as the radio button ID to the controller.

The view looks as follows and I have tested this and the values are being sent to the controller.

<label class="radio-button" ng-repeat="option in checkItemDescription.options">
    <input type="radio" name="option_question_id_{{checkItemDescription.fleetcheckitemid}}" 
                            ng-model="checkItemDescription.selected_id"
                            ng-click="doSomething(checkItemDescription.fleetcheckitemid, option.fleetcheckid)"
                            ng-value="option.fleetcheckid">
    <div class="radio-button__checkmark"></div>
    Description: {{option.checkvaluedesc}}
</label>

In my doSomething() method i am trying to see if either the checkItemDescription.fleetcheckitemid or the option.fleetcheckid id is in a existing array.

I use indexOf() method to compare the values but the method does not seem to work - even though console.log() shows values are sent to the controller.

Below is my doSomething() method.

$scope.doSomething = function(fleetCheckItemID, fleetCheckID)
{
    if ( $scope.initialFleetCheckIssueItemIDArray.indexOf(fleetCheckItemID))
    {
        console.log("Yeah!"); // Never gets to here even though logs show values exist
    }
    else
    {
        console.log("Ah!"); // Always get here
    }
}

What I need to do is to to create a JSON object with the list item ID, radio button ID and some other values eg date/time based on the user selection to send to my Database.

Is this the best way to do it or is there a better way?

Answer 1

The indexOf() method returns the first index at which a given element can be found in the array, or -1 if it is not present.

-referenced from MDN .

so if your element is first in the collection then indexOf would return 0 which would result in the execution of else block so change your if condition like this.

if ( $scope.initialFleetCheckIssueItemIDArray.indexOf(fleetCheckItemID) != -1 )
{
    //element found, do stuff here.
}
else
{
    //element does not found, else stuff here.
}