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up vote -1 down vote favorite

This is my array object

var item = [
    {index:1, name: 'miraje'},
    {index:2, name: 'alamin'},
    {index:3, name: 'behestee'},
    {index:4, name: 'arif'},
    {index:5, name: 'riad'}
];

when i delete an object like index: 2 , and that time i want to update my index value like ..

   var item = [
            { index: 1, name: 'miraje'},
            { index: 2, name: 'behestee'},
            { index: 3, name: 'arif'},
            { index: 4, name: 'riad'}
         ];
share|improve this question
    
Show code efforts – Shubhranshu 10 hours ago
    
your accepted answer does not match the requirement with looking for index = 2. it uses a known index (1) of the array, which is not given. – Nina Scholz 10 hours ago
up vote 0 down vote accepted

After you remove element you can use forEach() loop to change indexes.

var item = [
{index:1, name: 'miraje'},
{index:2, name: 'alamin'},
{index:3, name: 'behestee'},
{index:4, name: 'arif'},
{index:5, name: 'riad'}
];

item.splice(1, 1)
item.forEach((e, i) => e.index = i + 1)
console.log(item)

share|improve this answer
up vote 0 down vote

Just for a variety, without modifying the original array an efficient O(n) approach would also be as follows. We can also provide a range to delete the elements as well...

The range is provided supplied with the array indices, not the object index properties.

var item = [
    {index:1, name: 'miraje'},
    {index:2, name: 'alamin'},
    {index:3, name: 'behestee'},
    {index:4, name: 'arif'},
    {index:5, name: 'riad'}
];
function deleteObjectsFromArray(a,j,k){
  return a.reduceRight((p,c,i) => i >= j && i < k ? p
                                                  : i >= k ? (c.index -= k-j, p[c.index-1] = c, p)
                                                           : (p[c.index-1] = c, p),[]);
}

console.log(deleteObjectsFromArray(item,2,4));

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up vote 0 down vote

Basically, you need to find the item with index, delete it, and to update all following items.

function deleteItem(array, index) {
    var i = 0, found = false;
    while (i < array.length) {
        if (found) {
            --array[i].index;
            ++i;
            continue;
        }
        if (found = array[i].index === index) {
            array.splice(i, 1);
            continue;
        }
        ++i;
    }
}

var items = [{ index: 1, name: 'miraje' }, { index: 2, name: 'alamin' }, { index: 3, name: 'behestee' }, { index: 4, name: 'arif' }, { index: 5, name: 'riad' }];

deleteItem(items, 2);
console.log(items);
.as-console-wrapper { max-height: 100% !important; top: 0; }

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up vote 0 down vote

Remove the object and alter the index property of each object,

DEMO

i=1;
var item = [
{index:1, name: 'miraje'},
{index:2, name: 'alamin'},
{index:3, name: 'behestee'},
{index:4, name: 'arif'},
{index:5, name: 'riad'}
];
console.log(item);
delete item[ 2 ];
console.log(item);
item.forEach(function(obj) {
     obj.index = i;
     debugger;
     i++;
});
console.log(item);

share|improve this answer
up vote 0 down vote

use foreach loop and assign the index

item.forEach(function(obj,i){
   obj.index = i+1;
})
share|improve this answer

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