StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
19918923
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
1
CommunityOwnedDate
CreationDate
2013-11-12T00:49:18.127
FavoriteCount
0
LastActivityDate
2015-08-05T23:05:40.610
LastEditDate
2015-08-05T23:05:40.610
LastEditorUserId
1226013
OwnerUserId
1226013
ParentId
19917941
PostTypeId
2
Score
20
ViewCount
0
LastEditorDisplayName
text
Body
My original answer is at the bottom, but the latest Ember releases provide a really nice new solution for this: <pre><code>genres: Ember.computed.mapBy('songs', 'genre'), uniqueGenres: Ember.computed.uniq('genres'), </code></pre> References: <a href="http://emberjs.com/api/classes/Ember.computed.html#method_mapBy">mapBy</a> and <a href="http://emberjs.com/api/classes/Ember.computed.html#method_uniq">uniq</a>. Computed property macros are great =) previous answer: <pre><code>genres: function() { return this.get('songs').map(function(song){ return song.genre }).filter(function(genre, index, arr){ return arr.indexOf(genre) == index // throw away any instances which are not first }) }.property('songs'), </code></pre> note, I'm leveraging 'modern' array functions such as map and filter here, if you need to support older browsers, you'll need to shim those or write this another way. The filter I used for removing duplicates is the first that occurred to me, it's probably not very performant and if you've already loaded a library with a unique function (like <a href="http://underscorejs.org/#uniq">underscore.uniq</a>), you should use that. Very little of this is Ember specific of course, the <code>.property('songs')</code> on the end is literally all you need to specify that this is a computed property, which will be cached and recomputed if songs changes (assumes Ember 1.0) References: MDN for <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map">map</a> and <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter">filter</a>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POember.js - extract distinct properties from array
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USDavid McMullin
UserOwnerUserId
1. USDavid McMullin
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. POember.js - extract distinct properties from array
 singulars
 PostTypePostTypeId
 PTQuestion
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTAcceptedByOriginator
2. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.