jquery - Get value from dictionary in JavaScript by key - Stack Overflow

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In JavaScript script I have created following dictionary.

var dictionary =[];
$(function () {
  dictionary.push({
    key: @item.Key.ToShortDateString().ToString(),
    value: @Html.Raw(JsonConvert.SerializeObject(item.Value)),
  });
  alert(dictionary['2017-09-19']);
});

In alert it shows me undefined. How can I read value from this dictionary?

In JavaScript script I have created following dictionary.

var dictionary =[];
$(function () {
  dictionary.push({
    key: @item.Key.ToShortDateString().ToString(),
    value: @Html.Raw(JsonConvert.SerializeObject(item.Value)),
  });
  alert(dictionary['2017-09-19']);
});

In alert it shows me undefined. How can I read value from this dictionary?

• javascript
• jquery

Share Improve this question Follow edited Sep 10, 2017 at 17:20 Shiladitya 12.2k1717 gold badges2828 silver badges4242 bronze badges asked Sep 10, 2017 at 17:17 maciejkamaciejka 94833 gold badges1919 silver badges4545 bronze badges 3

• date 2017-09-19 is added eariler as a key. – maciejka Commented Sep 10, 2017 at 17:18
• 1 You have an array, it's not a dictionary, and it doesn't have named keys, but indexes. Your array contains objects though. It seems you wanted an object instead of the array – adeneo Commented Sep 10, 2017 at 17:19
• It also turned out that key must be saved using @Html.Raw(JsonConvert.SerializeObject to read value by key as a date saved in string. – maciejka Commented Sep 10, 2017 at 18:23

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2 Answers 2

Sorted by: Reset to default 4

Rather than using an array use an object

$(function () {
  var dictionary = {};
  dictionary[@item.Key.ToShortDateString().ToString()] = @Html.Raw(JsonConvert.SerializeObject(item.Value));
  alert(dictionary['2017-09-19']);
});

The variable dictionary is an array which consists of objects. If you want to access you need to access by index.

DEMO

 var dictionary = [];
 dictionary.push({
    key: '2017-09-19',
    value: 'test',
  });
var result = dictionary.filter(function(element) {
    return element.key == '2017-09-19';
});

if (result.length > 0) {
    // we have found a corresponding element
     console.log(result[0].value);
}

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