JavaScript Multidimensional Array - Object Linking -


i working javascript multidimensional array.

here scenario:-

i have educational institution user can take classes subject. subjects not fixed vary. there exam day suppose there php lang faculty enter subject name student name , marks. if student enrolled himself more 1 subject marks listed in same row.

for example mr. anand has enrolled php , html , mr. deep has enrolled himself php only.

additionally want show minimum , maximum marks well.

so on result day result card 

name\subject | php  |  html   |  java -------------------------------------- anand        | 80   |  60     |  -- deep         | 70   |  --     |  -- sachin       | 55   |  56     |  45 on ...    | --   |  --     |  80 -------------------------------------- min marks    | 70   |  56     |  45 max mark     | 80   |  60     |  80

i have created multidimensional array unable reproduce code per visual. think doing wrong.

below code have created of :-

var data = [     ["html", [{         "name": "anand",         "marks": 90     }, {         "name": "deep",         "marks": 79     }, {         "name": "raman",         "marks": 34     }]],     ["php", [{         "name": "anand",         "marks": 90     }, {         "name": "ekam",         "marks": 40     }]] ]  (var = 0; < data.length; i++) {     document.write("<h2> " + data[i][0] + " </h2>");      var secondleveldata = data[i][1],         secondlen = secondleveldata.length;      (var j = 0; j < secondlen; j++) {         document.write(secondleveldata[j].name + " -- " + secondleveldata[j].marks + " <br/>");     } }

please me desired result. working on it.

thanks help!!

by changing json can achieve this. added jquery , underscore libraries dom , array manipulations

js fiddle link : https://jsfiddle.net/8lb7x01u/3/

var data = [ {     "name": "anand",     "score": [         {             "subject": "html",             "marks": 90         },         {             "subject": "php",             "marks": 90         }     ] }, {     "name": "deep",     "score": [         {             "subject": "html",             "marks": 79         }     ] }, {     "name": "raman",     "score": [         {             "subject": "html",             "marks": 34         }     ] }, {     "name": "ekam",     "score": [         {             "subject": "php",             "marks": 40         }     ] } ]; var allscores = _.pluck(data,"score"); var allsubjects = _.groupby(_.flatten(allscores),"subject"); var allstudents = _.pluck(data,"name"); var headerrow = $("<tr></tr>"); $("<th></th>").html("name\\subject").appendto(headerrow);  for(var subject in allsubjects){  $("<th></th>").html(subject).appendto(headerrow);     }  headerrow.appendto(".scorecard"); for(var i=0;i<allscores.length;i++){ var individualscores = _.groupby(allscores[i],"subject"); var tr = $("<tr></tr>");  $("<td></td>").html(allstudents[i]).appendto(tr);     for(var subject in allsubjects)     {         if(individualscores[subject]){  $("<td></td>").html(individualscores[subject][0].marks).appendto(tr);         }else         {             $("<td></td>").html("...").appendto(tr);         }  }     tr.appendto(".scorecard tbody") }  rendermaxmin("max"); rendermaxmin("min");   function rendermaxmin(param){      var footerrow = $("<tr></tr>");     $("<td></td>").html(param+" marks").appendto(footerrow);         for(var subject in allsubjects){     var marks = _.pluck(allsubjects[subject],"marks");     var value =(param === "max") ? _.max(marks) : _.min(marks);     $("<td></td>").html(value).appendto(footerrow);         }     footerrow.appendto(".scorecard tfoot") }

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