Return specific value of all objects in an array

Question

The following code returns only the "name" of the first item in the array "category". However I need it to return the "name" value of each item in the array.

What am I missing?

function loadCategories(id){
   for (var i = 0; i<folder.grades.models.length; i++){
      if(folder.grades.models[i].attributes.entityid==id) {
         return folder.grades.models[i].attributes.categories.category[i].name;
      }
   }
}

Why are you using the same i as an index into both models and category? — Eric
– Eric, Commented Feb 27, 2013 at 19:24

Eric · Accepted Answer · 2013-02-27 19:20:57Z

1

function loadCategories(id){
   var items = folder.grades.models;
   for (var i = 0; i<items.length; i++){
      if(items[i].attributes.entityid==id) {
         return items[i].attributes.categories.category.map(function(c) {
            return c.name;
         });
      }
   }
   return [];
}

answered Feb 27, 2013 at 19:20

Eric

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2 Comments

captainrad Over a year ago

Curious.. If I wanted to also get another property such as the "age" of the category and not only the name, would I need to write another function or for loop within the current function?

Eric Over a year ago

You could replace return c.name; with return [c.name, c.age];

martriay · Accepted Answer · 2013-02-27 19:15:36Z

1

return exits the function, you should add all names to an array and then return that array

function loadCategories(id){
   var names = [];
   for (var i = 0; i<folder.grades.models.length; i++){
      if(folder.grades.models[i].attributes.entityid==id) {
         names[i] = folder.grades.models[i].attributes.categories.category[i].name;
      }
   }
   return names;
}

answered Feb 27, 2013 at 19:15

martriay

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Comments

syazdani · Accepted Answer · 2013-02-27 19:17:02Z

Return statements break out of functions, so once it hits that return statement, the function is over. If you want all of the names of the categories that match entity id:

function loadCategories(id){
   var result = [];
   for (var i = 0; i<folder.grades.models.length; i++){
      if(folder.grades.models[i].attributes.entityid==id) {
         for (var j = 0; j < folder.grades.models[i].attributes.categories.category.length; ++j) {
            result.push(folder.grades.models[i].attributes.categories.category[j].name);
         }
      }
   }
   return result;
}

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