javascript - chrome.storage.local.get results in "Undefined" when called -

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i'm building chrome extension, , needed save data locally; used storage api . got run simple example , save data, when integrated application, couldn't find data , giving me "undefined" result.

here code:

    function saveresults(newsid, resultsarray) { //save result         for(var = 0; < resultsarray.length; i++) {             id = newsid.tostring() + '-' + i.tostring();             chrome.storage.local.set({ id : resultsarray[i] });         } //read , delete saved results         for(var = 0; < resultsarray.length; i++) {             id = newsid.tostring() + '-' + i.tostring();             chrome.storage.local.get(id, function(value){                 alert(value.id);             });             chrome.storage.local.remove(id);         }     }

i not type of data saving or how much, seems me there may more 1 newsid , resultsarray of varying length each one. instead of creating keys each element of resultsararry have considered storing entire thing is. example of be:

chrome.storage.local.set({'results':[]});  function saveresults(newsid, resultsarray) {   // first combine data 1 object   var result = {'newsid':newsid, 'resultsarray':resultsarray};    // next push each individual results object array   chrome.storage.get('results',function(item){     item.results.push(result);     chrome.storage.set({'results':item.results});   }); }  function getresults(newsid){   chrome.storage.get('results', function(item){     item.results.foreach(function(v,i,a){       if(v.newsid == newsid){         // here v.resultsarray array stored         // can remove part of such         v.resultsarray.splice(0,1);         // or         a.splice(i,1);         // remove whole object, set again         chrome.storage.local.set({'results':a});       }     });   }); }

this way don't need worry dynamically naming fields or keys.


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