How to read a complex and nested json data

Question

My question is, how can you read a specefic form of json data using javascript, for example if i had this one, it's seems to me a bet difficult, so can you help me out.

{ "jQRReponse": [ [ { "sujet": "RHONE ALPES", "verbe": "est_le_nom_de_la_region", "complement": { "sujet": "82", "verbe": "est_la_region_du_dept", "complement": { "sujet": "01", "verbe": "est_le_numero_du_dept", "complement": { "sujet": "Ain", "verbe": "contient_les_resultats_de_depAnn", "complement": { "sujet": "Ain2014", "verbe": "Pop_results_Ens_Total", "complement": "626794" } } } } } ], [ { "sujet": "RHONE-ALPES", "verbe": "est_le_nom_de_la_region", "complement": { "sujet": "82", "verbe": "est_la_region_du_dept", "complement": { "sujet": "01", "verbe": "est_le_numero_du_dept", "complement": { "sujet": "Ain", "verbe": "contient_les_resultats_de_depAnn", "complement": { "sujet": "Ain2014", "verbe": "Pop_results_Ens_Total", "complement": "626794" } } } } } ] ] }

Say if I had this form:

data : [{ toto:5, mama:10 }, { toto:99, mama:10 }, { toto:88, mama:10 }]

I'm gonna read the toto value at the index i like this : data[i].toto.

So how can I do it for the first one.

Thank you

Acttually I want to be able to read all values that I can use them later — Yahya Alami
– Yahya Alami, Commented Jul 18, 2016 at 7:13
@YahyaAlami first you parse the data in the javascript to json object, you can visualise your data here jsoneditoronline.org , then using obj.jQRReponse[1].sujet etc , just a tip — Arun Prasad E S
– Arun Prasad E S, Commented Jul 18, 2016 at 7:16

Nina Scholz · Accepted Answer · 2016-07-18 07:33:51Z

You could iterate over all data and get the ressult.

The access is in the form like

data.jQRReponse[0][0].complement.complement.sujet // returns "01"

function read(o) { Object.keys(o).forEach(function (k) { if (o[k] !== null && typeof o[k] === 'object') { console.log(k + ' -->'); read(o[k]); return; } console.log(k + ': ' + o[k]); }); } var data = { "jQRReponse": [[{ "sujet": "RHONE ALPES", "verbe": "est_le_nom_de_la_region", "complement": { "sujet": "82", "verbe": "est_la_region_du_dept", "complement": { "sujet": "01", "verbe": "est_le_numero_du_dept", "complement": { "sujet": "Ain", "verbe": "contient_les_resultats_de_depAnn", "complement": { "sujet": "Ain2014", "verbe": "Pop_results_Ens_Total", "complement": "626794" } } } } }], [{ "sujet": "RHONE-ALPES", "verbe": "est_le_nom_de_la_region", "complement": { "sujet": "82", "verbe": "est_la_region_du_dept", "complement": { "sujet": "01", "verbe": "est_le_numero_du_dept", "complement": { "sujet": "Ain", "verbe": "contient_les_resultats_de_depAnn", "complement": { "sujet": "Ain2014", "verbe": "Pop_results_Ens_Total", "complement": "626794" } } } } }]] }; read(data, []);

Community · Accepted Answer · 2017-05-23 11:58:57Z

You can access the specific part of this nested json object if you know the element, depth and the key.

Say if your element is 0, depth is 2 and the key is verbe, then you can do like this:

nestedObj[0].complement.complement.complement.verbe

If your requirement is to traverse the whole object and find something you need, you can use a recursive function for each element.

function traverse_it(obj){ for(var prop in obj){ console.log(obj[prop]); //Or whatever you want to do with this level if(typeof obj[prop]=='object'){ traverse_it(obj[prop[i]]); //Function goes to the next level here } } } traverse_it(nestedObj);

Here is lot of insight

no that's incorrect it must be like this actually nestedObj[i][0], but I thank you tho for your answer
My answer considered only the obj part. Not the array which contained multitudes of it.

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