如何为我的JavaScript正确编写此数组

Question

I have run into this problem again and now really need to know how to correctly write this array.

I have a drop-box that, based on the value selected, will display a particular field-set(s) via the ID of the field-set.

In some cases, two different values from the drop-box may call the same field-sets. So for example, if I choose banners , several field-sets will be displayed, if I choose Homepage Updates , the same field-sets would be displayed. So I want my array to basically be>> if the value selected in project type drop-box equals Banners or Homepage Updates , show the specified field-sets. The problem is, only the first option works. In this case Banners. When I select Homepage Updates, nothing is displayed.

Does anyone know who to write this array correctly? I have a ton of types that I have to code and the array is the clearest way to write it, but I can't get past this hurdle. Help please. A portion of the array is below.

var projectTypes = new Array (
  {id : '660' , value:('Banners' ||'Homepage Updates')},
  {id : '659' , value:('Banners' || 'Homepage Updates')},
  {id : '661' , value:'Banners'}, 
  {id : '662' , value:'Banners'},   
  {id : '663' , value:'Banners'}, 
  {id : '668' , value:'Redirect'}, 
  {id : '229' , value:'Affiliates'},
  {id : '236' , value:'Affiliates'},
  {id : '242' , value:'Affiliates'},
  {id : '250' , value:'Affiliates'},
  {id : '251' , value:'Resources'},
  {id : '375' , value:'Resources'},
  {id : '376' , value:'Resources'},
  {id : '377' , value:'Ads'},
  {id : '237' , value:'Ads'}
);

Answer 1

Firstly, your expression ('Banners' ||'Homepage Updates') will always be evaluated to 'Banners' .
The logical operator OR ( written as || ) is evaluated as :

boolean OR boolean

Since the first expression's argument is a String that is not empty, it is automatically converted to a true value (because of the automatic type-conversion.

In your case, I suggest You use an array of possible values to for your objects.
This way, you can choose the appropriate one:

var projectTypes = new Array (
  {id : '660' , value: ['Banners', 'Homepage Updates']},
  {id : '659' , value: ['Banners', 'Homepage Updates']},
  {id : '661' , values: ['Banners']}, 
  {id : '662' , values: ['Banners']},   
  {id : '663' , values: ['Banners']}, 
  {id : '668' , values: ['Redirect']}, 
  {id : '229' , values: ['Affiliates']},
  {id : '236' , values: ['Affiliates']},
  {id : '242' , values: ['Affiliates']},
  {id : '250' , values: ['Affiliates']},
  {id : '251' , values: ['Resources']},
  {id : '375' , values: ['Resources']},
  {id : '376' , values: ['Resources']},
  {id : '377' , values: ['Ads']},
  {id : '237' , values: ['Ads']}
);

If I understand correctly and you want to access some ids based on a value, you could organize your objects like this :

var projectTypes = {
    'Banners' : [660, 659, 661, 662, 663],
    'Homepage Updates' : [660, 659],
    'Redirect' : [668], 
    'Affiliates' : [229, 236, 242, 250],
    'Resources' : [251, 375, 376],
    'Ads' : [237, 377]
};