Databases
StackOverflow2013
Postsdbo
POLarge arrays & javascript comparison
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POLarge arrays & javascript comparison
    primarykey
    data
    text
    <p>So i have two very large multidimesional arrays(4000+). I get the first array as a response from the server where, i have to create dom nodes for each of these array elements. Once this process is finished i have to send another request where i will get another list of elements which will be a subset of the first list, based on the second list i have to modify some elements in the first list (and reflect these changes in the DOM as well). This process takes a very long time to finish, is there any way to accomplish this without two for loops? Or perhaps a faster comparison?</p> <p><strong>Scenario</strong></p> <blockquote> <p>The real world example would be as follows, consider a group of people in a particular area (arr1). In DOM this would be represented as <code>CheckBox - Name</code> Now consider a group of people who have been administered with a particular vaccine (arr2), Now arr2 has the list of elements for which the checkbox should be checked. The whole list(arr1's dom representation) has to be shown at all costs.</p> </blockquote> <p>Arrays are of the type </p> <pre><code>[ ["index", "name", "age"],............. ["4000-index", "4000-name", "4000-age"]] </code></pre> <p>Here is a pseudo code..</p> <pre><code>//First request, get the response (resp) and Create DOM elements accordingly for(var i=0, iLen=resp.length; i&lt;iLen; i++) { // Checkbox and &lt;span id='entry-"+resp[i][0]+"'&gt;resp[i][1]&lt;/span&gt; } // At a later stage in the code... //Request server for the second list get the response (resp) arr2 = resp // Second Array // Walk through the dom, get the list of span elements and store their ids in an array arr1 for(var i=0, iLen=arr1.length; i&lt;iLen; i++) { for(var j=0, jLen= arr2.length; j&lt;jLen; j++) { if(+arr2[j][0] === +arr1[i][0]) { //checkbox attr = 'checked' } } } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USAshwin Krishnamurthy
    1. USAshwin Krishnamurthy
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POLarge arrays & javascript comparison
      1. This table or related slice is empty.
      1. VTUpMod
    1. COdo you have some example code - and maybe an example dataprovider? would make it easier to help :-)
      singulars
      1. POLarge arrays & javascript comparison
      1. USsanta
    2. COmaybe you should rethink what the server sends to the client. since the 2 lists are related , why 2 queries ?
      singulars
      1. POLarge arrays & javascript comparison
      1. USmpm
    3. CO@camus & santa : I have updated my question for ease of understanding. The two queries are because these lists are maintained in different databases. Hence.
      singulars
      1. POLarge arrays & javascript comparison
      1. USAshwin Krishnamurthy
 

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.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload