Fetching data from JSON array

Question

I've got some troubles fetching data from JSON array. I'm using node + async + request (and express ofc).

Part of the code :

 function(data, callback){
                var URL = 'https://'+ server + '.api.pvp.net/api/lol/' + serw + '/v1.3/stats/by-summoner/' + data.id + '/summary?season=SEASON2016&api_key=' + api;
                request(URL, function(err, response, body){
                    if(!err & response.statusCode == 200){
                        var json = JSON.parse(body);
                        var assists = json['playerStatSummaries'][0]['aggregatedStats'].totalAssists;

The main problem is that [0] is giving back the first object from array.

{
   "playerStatSummaries": [
      {
         "playerStatSummaryType": "CAP5x5",
         "aggregatedStats": {
            "totalNeutralMinionsKilled": 2042,
            "totalMinionKills": 4317,
            "totalChampionKills": 350,
            "totalAssists": 417,
            "totalTurretsKilled": 36
         },
         "modifyDate": 1453276061000,
         "wins": 20
      },
      {
         "playerStatSummaryType": "CoopVsAI",
         "aggregatedStats": {
            "totalNeutralMinionsKilled": 446,
            "totalMinionKills": 6100,
            "totalChampionKills": 1092,
            "totalAssists": 761,
            "totalTurretsKilled": 116
         },
         "modifyDate": 1453276061000,
         "wins": 80
      },

Sometimes the array is a bit different and if player haven't played any "CAP5x5" game, the COOPvsAI is the [0] object.

Any ideas how to fetch data by it's playerStatSummaryType instead of object number in array? Or how to make some kind of bypass that makes null when can't find "CAP5x5" mode? Thanks.

var assists = json['playerStatSummaries'][0]['aggregatedStats'].totalAssists; Gives me totalAssists of 1 object in the array and i want to get out totalAssists but without using [0], because sometimes if player hasn't played this mode the [0] is something totally different and it's not giving back data that i need. — BaSic
– BaSic, Commented Jul 10, 2016 at 15:09

Norbert Huurnink · Accepted Answer · 2016-07-10 15:09:29Z

1

function filterOnPlayerStatSummary(myObject, filter)
{
    var result = [];
    for(var i = 0; i < myObject.length; i++) 
    {
        if (myObject[i].playerStatSummary == filter)
        { 
            result.push(myObject[i]);
        }
    }

    return result;
}

answered Jul 10, 2016 at 15:09

Norbert Huurnink

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George Chen · Accepted Answer · 2016-07-10 15:40:55Z

0

if you are using ES2015, the following will work

let json = JSON.parse(body);
let assists = json
   .playerStatSummaries
   .filter((a) => a.playerStatSummaryType =='CAP5x5')
   .map((a) => a.aggregatedStats.totalAssists)
   .reduce((a,b)=>a+b)

answered Jul 10, 2016 at 15:40

George Chen

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