javascript - jQuery JSON to multi dimensional array -


so have jquery .getjson so:

var tournamentdata = [];  $.getjson( "http://tourn.dev/data/tournaments", function( data ) {    $.each(data, function(i) {       var tempdata = [];       $.each(this, function(k, v) {         tempdata.push(v);      });       tournamentdata.push(tempdata);    });  });  console.log(tournamentdata);

the json request returns:

[     {         "id":1,         "name":"one",         "max_users":100,         "registered_users":0,         "prize_pool":1000,         "entry_fee":10,         "published":0,         "registration_open_date":"0000-00-00 00:00:00",         "registration_close_date":"0000-00-00 00:00:00"         ,"start_date":"0000-00-00 00:00:00",         "created_at":"2015-04-28 20:35:23",         "updated_at":"2015-04-28 20:35:23"     },     {         "id":2,         "name":"two",         "max_users":1000,         "registered_users":0,         "prize_pool":10000,         "entry_fee":100,"published":0,         "registration_open_date":"0000-00-00 00:00:00",         "registration_close_date":"0000-00-00 00:00:00",         "start_date":"0000-00-00 00:00:00",         "created_at":"2015-04-28 20:37:16",         "updated_at":"2015-04-28 20:37:16"     } ]

now, when check console log in firefox tournamentdata array of 2 arrays 'array [ array[12], array[12] ]'.

however, when try access multi-array through like:

alert(tournamentdata[0][0]);

it returns undefined.

what seeing in console live reference of array , looks right....but not snapshot , changed array gets changed

however try stringifying in code in question , see empty array. why? because ajax hasn't completed @ time trying access data.

the live reference looks right because console isn't showing exaclty array looked @ time logged, show subsequent changes ...due prototypical inheritance

you can see in demo code:

var tournamentdata = [];  $.getjson("data.json", function(data) {    $.each(data, function(i) {     var tempdata = [];     $.each(this, function(k, v) {       tempdata.push(v);     });     console.log('push data now'); //fires after 1 below     tournamentdata.push(tempdata);    });  }); //this log empty array , fires before above logs console.log('log outside getjson', json.stringify(tournamentdata));

conclusion: if want access arrays , parse dom has done in $.getjson callback...the first a in ajax stands asynchronous

for explanation , must read working ajax see: how return response asynchronous call? .

demo


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