Javascript nested arrays with strings -

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i have array contains array strings:

var text; var languageset = ["language4", "language5"]; var languages = [         ["language1", "language2", "language3"],         languageset,         "language6"     ];  (function selector() {     (i = 0; < languages.length; i++) {         (j = 0; j < languages[i].length; j++) {             text += "<option value='" + languages[i][j] + "'>" + languages[i][j] + "</options>";         }     }     document.getelementbyid("languageoptions").innerhtml = text; })();

html:

<select id="languageoptions"> </select>

but everytime run this, output "language 6" ends being such:

l n g u g e  6

how output entire string? don't know why code doesn't work strings , arrays inside arrays.

you should type check see if item array , loop array. used array.isarray here type check. code example working test.

the array.isarray() method returns true if object array, false if not.

var text;  var languageset = ["language4", "language5"];  var languages = [          ["language1", "language2", "language3"],          languageset,          "language6"      ];      (function selector() {      (i = 0; < languages.length; i++) {        if (array.isarray(languages[i])) {          (j = 0; j < languages[i].length; j++) {                          text += "<option value='" + languages[i][j] + "'>" + languages[i][j] + "</options>";          }        } else {          text += "<option value='" + languages[i] + "'>" + languages[i] + "</options>";        }      }      document.getelementbyid("languageoptions").innerhtml = text;  })();
<select id="languageoptions">  </select>


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