topic Re: Webscript controller : Just a misunderstood about null value in Alfresco Archive

Webscript controller : Just a misunderstood about null value

zomurn — Wed, 18 Jan 2012 15:36:02 GMT

Hi,I'am currently debugging a webscript (not of mine) turning on all debugging features for web script in alfresco, more precisely a controller named categories.get.js ; here a portion of code of it :for(var i = 0; i < categories.length; i++) { var result = connector.get("/deckshare/category

Re: Webscript controller : Just a misunderstood about null value

amandaluniz_z — Thu, 19 Jan 2012 13:28:23 GMT

Hi,

Check this article: http://javascript.about.com/library/blequals.htm

Re: Webscript controller : Just a misunderstood about null value

zomurn — Fri, 20 Jan 2012 11:26:45 GMT

ok thanks.
Below, another test.

Input code :

for(var i = 0; i < categories.length; i++) {
      var result = connector.get("/deckshare/categoryChildren/path/"+categories[i]);
      if(result != null && result != "" && result != undefined) {
         logger.log("isEmptyTest :");
         logger.log(isEmpty(result));
         logger.log(result);
         logger.log(String(result));
         var obj = eval('(' + result + ')');
         //for(var j = 0; j < obj.children.length; j++) {
            if(childSelected(obj, nodeId)) {
               //obj.expanded = "true";
            }
         //}
         results.push(obj);
      }
   }

function isEmpty(obj) {
   if (typeof obj == 'undefined' || obj === null || obj === '') return true;
   if (typeof obj == 'number' && isNaN(obj)) return true;
   if (obj instanceof Date && isNaN(Number(obj))) return true;
   return false;
}
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Output result (space are displayed with '_' (underscore) caracter) :

12:22:41,461 DEBUG [org.alfresco.repo.jscript.ScriptLogger]_isEmptyTest_:
12:22:41,464 DEBUG [org.alfresco.repo.jscript.ScriptLogger]_false
12:22:41,464 DEBUG [org.alfresco.repo.jscript.ScriptLogger]_
12:34:37,318 DEBUG [org.alfresco.repo.jscript.ScriptLogger]_null
‍‍‍‍‍

Can someone tell me the value of the "result" variable then ?

Thanks

Re: Webscript controller : Just a misunderstood about null value

amandaluniz_z — Fri, 20 Jan 2012 11:28:13 GMT

Seems to be a string with a space: " "

Re: Webscript controller : Just a misunderstood about null value

amandaluniz_z — Fri, 20 Jan 2012 11:30:12 GMT

Sorry not… it's not a space….

Re: Webscript controller : Just a misunderstood about null value

zomurn — Fri, 20 Jan 2012 11:38:27 GMT

Yes, this is NOT a space, this is nothing.
Check again, I just have edited the code (String(result)) output added.

I don't understand this code…