Create dynamic index for array of object jquery

Question

var menu = [];
$('.mainmenu').click(function() {
  $('.mainmenu').each(function(i,v) {

    var sub = {};
    var indexmenu = $(this).attr('id');
    sub[indexmenu] = $(this).attr('data-currstate');
    menu.push(sub);

  })
  $.each(menu,function(i,v) {
    console.log(i)
    console.log(v)
  })
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<a target="_top" href="#" class='mainmenu' id='maintenance' data-currstate='hide'>
  <i class="fa fa-cogs"></i> Maintenance
</a>

I want to create an array of object from a menu wherein I want the ID of each menu to be the index and the value will be state.

I want the id of each menu to be the index and the state to be the value
What i get is the id and value becomes the value

Note:

In my actual code the creation of the menu array happens on load of page in demo I created it on click. Also the reason why I created on load is that I store the value in local storage. I made the demo as simple as I can

@Justcode in the console log I want to get maintenance as index instead of 0and hide as value instead of {"maintenance":"value"} — guradio
– guradio, Commented Dec 14, 2018 at 5:48

Rajesh Dixit · Accepted Answer · 2018-12-14 06:05:42Z

1

You can use Map instead of object.

This is a part of ES6, so you will have browser compatibility issues. You can check compatibility.

ES6 introduced 2 new classes: Map and Set, which are similar to Array and Objects, but with 1 major difference. Their keys can be anything. So you can have array index as non-numeric values as well. If you want them to be unique, you can look into Set.

var menu = new Map();
$('.mainmenu').click(function() {
  $('.mainmenu').each(function(i,v) {
    menu.set($(this).attr('id'), $(this).attr('data-currstate'));
  })
  for( const [k, v] of menu.entries()) {
    console.log(`Key: ${k} | Value: ${v}`)
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<a target="_top" href="#" class='mainmenu' id='maintenance' data-currstate='hide'>
  <i class="fa fa-cogs"></i> Maintenance
</a>

edited Dec 14, 2018 at 6:05

answered Dec 14, 2018 at 5:58

Rajesh Dixit

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3 Comments

guradio Over a year ago

this is what I wanted can you add a bit more explanation please

guradio Over a year ago

happy coding mate

Rajesh Dixit Over a year ago

@guradio Please check the update. Hope it answers your queries

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