jquery - Format Muilty dimentional array using javascript -


i json data showing below.

[    {       "id":5,       "entity_id":122,       "entity_type":"student",       "edit_type":"update",       "created_by":122,       "created_date":"2017-04-04t18:30:00.000z",       "change_log_id":2,       "field_name":"full_name",       "current_value":"cur14111r name",       "previous_value":"old11111 name"    },    {       "id":7,       "entity_id":122,       "entity_type":"student",       "edit_type":"update",       "created_by":122,       "created_date":"2017-04-04t18:30:00.000z",       "change_log_id":2,       "field_name":"country",       "current_value":"syriya11111",       "previous_value":"america1111"    },    {       "id":6,       "entity_id":122,       "entity_type":"student",       "edit_type":"update",       "created_by":122,       "created_date":"2017-04-04t18:30:00.000z",       "change_log_id":2,       "field_name":"school",       "current_value":"hmv11111",       "previous_value":"tmv11111"    },    {       "id":8,       "entity_id":122,       "entity_type":"student",       "edit_type":"update",       "created_by":122,       "created_date":"2017-04-04t18:30:00.000z",       "change_log_id":2,       "field_name":"nick_name",       "current_value":"cokka1111",       "previous_value":"kukka1111"    },    {       "id":1,       "entity_id":122,       "entity_type":"student",       "edit_type":"update",       "created_by":122,       "created_date":"2017-04-05t23:38:08.000z",       "change_log_id":1,       "field_name":"full_name",       "current_value":"curr name",       "previous_value":"old name"    },    {       "id":3,       "entity_id":122,       "entity_type":"student",       "edit_type":"update",       "created_by":122,       "created_date":"2017-04-05t23:38:08.000z",       "change_log_id":1,       "field_name":"country",       "current_value":"syriya",       "previous_value":"america"    },    {       "id":2,       "entity_id":122,       "entity_type":"student",       "edit_type":"update",       "created_by":122,       "created_date":"2017-04-05t23:38:08.000z",       "change_log_id":1,       "field_name":"school",       "current_value":"hmv",       "previous_value":"tmv"    },    {       "id":4,       "entity_id":122,       "entity_type":"student",       "edit_type":"update",       "created_by":122,       "created_date":"2017-04-05t23:38:08.000z",       "change_log_id":1,       "field_name":"nick_name",       "current_value":"cokka",       "previous_value":"kukka"    } ]

i need format json using javascript. arr[change_log_id][id]["column_name"] = column vale;

the idea use array.prototype.reduce() follows.

var input = [ ... ];  var output = input.reduce((acc, value) => {     acc[value.change_log_id] = acc[value.change_log_id] || {};     acc[value.change_log_id][value.id] = acc[value.change_log_id][value.id] || {};     acc[value.change_log_id][value.id][value.current_value] = value.current_value;      return acc; }, []);

on data set produces following result:

[ ,   { '1': { 'curr name': 'curr name' },     '2': { hmv: 'hmv' },     '3': { syriya: 'syriya' },     '4': { cokka: 'cokka' } },   { '5': { 'cur14111r name': 'cur14111r name' },     '6': { hmv11111: 'hmv11111' },     '7': { syriya11111: 'syriya11111' },     '8': { cokka1111: 'cokka1111' } } ]

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