topic Working with an array of objects in Alfresco Archive

Working with an array of objects

srowsell — Tue, 28 Jan 2014 19:28:16 GMT

This is just about the stupidest problem I've seen but can't solve, but here is the code snippet:var items;var dailyReports=new Object();var dailyReportsArray=new Array();if (goodDoc){ var j=0; items=reportList.getChildren(); for each (child in items) { if (child.properties["reportdl:fr

Re: Working with an array of objects

anshu_kumar — Wed, 29 Jan 2014 06:53:55 GMT

Hello srowsell,

You should try this instead..

var items;
var dailyReports=new Object();
var dailyReportsArray=new Array();
 
if (goodDoc)
{
   var j=0;
   items=reportList.getChildren();
   for each (child in items)
   {
      if (child.properties["reportdl:frequency"]=="Daily")
      {
         dailyReports = {
            "uniqueIdentifier":child.properties["reportdl:uniqueIdentifier"],
            "suffix":child.properties["reportdl:suffix"],
            "department":child.properties["reportdl:department"],
            "found":false,
         };         
         dailyReportsArray.push(dailyReports);
         blurb+=j+" "+dailyReportsArray[j].uniqueIdentifier+" "+dailyReportsArray[j].suffix+" "+dailyReportsArray[j].department+" "+dailyReportsArray[j].found+"\n";  //comparison 1
         j++;
      }
      //blurb+=dailyReports.uniqueIdentifier+" "+dailyReports.suffix+" "+dailyReports.department+" "+dailyReports.found+"\n";
   }
 
   for (var i=0;i<dailyReportsArray.length;i++)
   {
      blurb+=i+" "+dailyReportsArray.uniqueIdentifier+" "+dailyReportsArray.suffix+" "+dailyReportsArray.department+" "+dailyReportsArray.found+"\n"; //comparison 2
   }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Let me know if this helps.

Re: Working with an array of objects

srowsell — Wed, 29 Jan 2014 13:30:46 GMT

Anshu…

That did the trick. Was I just being stubborn not making it into a JSON object? I still don't understand why the first assignment worked and the second one didn't, but I'll live with having a working piece of code.

Thanks very much for your help,

Steve

Re: Working with an array of objects

scouil — Wed, 29 Jan 2014 13:52:00 GMT

Hi,

OK so that's what happens:
You declare a "dailyReports" object at the beginning. and you append that object to your array. Hence your array has a pointer to that object.
And then at each loop, you just change the values of that object (not declaring a new one) and add that same object once more. etc.

. So at the end of your first loop first iteration, the array contains:
Cards v16 CDC false
. Then at the end of the second iteration it contains
Houses v9 Hamilton false
Houses v9 Hamilton false
. And at the end of the third it contains:
Activity r22 Messages false
Activity r22 Messages false
Activity r22 Messages false
Because in fact all 3 elements of your array point to the same object.

However, in anshu.kumar solution, you redeclare a new object each each loop iteration.
Keeping your old code but just adding

dailyReports = {};‍

As the first line of the loop would work as well. But I prefer assigning the whole object at once as anshu.kumar did.

Re: Working with an array of objects

srowsell — Wed, 29 Jan 2014 14:06:30 GMT

Ah, I get it now. Javascript was never my first language, so suggestions – I was going to say "pointers", but didn't want to make a pun – are always welcome, and valuable.

I think we can mark this one solved. Thanks again,

Steve