javascript - What does [ ] mean in JS? -


i have array below , jquery syntax place data on array table. working fine, but

  1. i don't quite understand keys [ ] mean! such "<td>" + datelist[i]["name"] + "</td>";

  2. if data isn't array, xml, or json, "<td>" + datelist[i]["name"] + "</td>"; still working?

    var datelist =[ { name: "mike jenson", email: "mike_j@yesware.com", phone: "9433550193", joined: "05/23/2014", }, { name: "jim stevens", email: "jim_s@yesware.com", phone: "1299331944", joined: "05/22/2014" }

    ];      $("#mytable").html("");     (var i=0; i< datelist.length; i++)     {         var tr="<tr>";         var td1 = "<td>" + datelist[i]["name"] + "</td>";         var td2 = "<td>" + datelist[i]["email"] + "</td>";         var td3 = "<td>" + datelist[i]["phone"] + "</td>";         var td4 = "<td>" + datelist[i]["joined"] + "</td></tr>";         $('#mytable').append(tr+td1+td2+td3+td4);     }

[] used in arrays specify index need access, when say:

somearray[0] getting value array's first index , in case

specifying index via variable coming loop , in second

specifying object's property property value index passed in 1st []:

datelist[i]["name"]

in case return ith index element of array's name property value.

if datelist[0]["name"] reutrn "mike jenson" because value

of first array object's name property value.

an alterantive datelist[0].name return same result.


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