javascript - How to read array inside JSON Object this is inside another array -

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i newbie json, parsing json object , struck @ point have read array elements inside object, again in array.. here json

   { "definitionsource": "test", "relatedtopics": [     {         "result": "",         "icon": {             "url": "https://duckduckgo.com/i/a5e4a93a.jpg"         },         "firsturl": "xyz",         "text": "sample."     },     {         "result": "",         "icon": {             "url": "xyz"         },         "firsturl": "xyz",         "text": "sample."     },     {         "topics": [             {                 "result": "",                 "icon": {                     "url": "https://duckduckgo.com/i/10d02dbf.jpg"                 },                 "firsturl": "https://duckduckgo.com/snake_indians",                 "text": "sample"             },             {                 "result": "sample",                 "icon": {                     "url": "https://duckduckgo.com/i/1b0e4eb5.jpg"                 },                 "firsturl": "www.google.com",                 "text": "xyz."             }         ]     } ] }

here need read url ,firsturl , text relatedtopics array , topics array.. can me. in advance.

something this

function (json) {     json.relatedtopics.foreach(function (element) {         var url = element.icon ? element.icon.url : 'no defined';         var firsturl = element.firsturl ? element.firsturl : 'no defined';         var text = element.text ? element.text : 'no defined';         alert("url: " + url + "\nfirsturl: " + firsturl + "\ntext: " + text);          if (element.topics)         {             element.topics.foreach(function (topicelement) {                  alert("topics - \n" + "url: " + topicelement.icon.url + "\nfirsturl: " + topicelement.firsturl + "\ntext: " + topicelement.text);             });          }     }); };

look fiddle example


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