如何在ionic 2中从数组中过滤json数据

我是爱奥尼亚2的初学者。我已成功地将URL中的数据提取到数组中。在我的json响应中,有多个重复的值。我使用 洛达斯 命令但我没有得到我所要求的正确结果。请给我这个解决方案。

这是我的json响应:

 {
            "port_group": "Bandra Group Of Ports",
            "port_name": "Dahanu"
        },
        {
            "port_group": "Bandra Group Of Ports",
            "port_name": "Tarapur"
        },
        {
            "port_group": "Bandra Group Of Ports",
            "port_name": "Navapur"
        },
        {
            "port_group": "Bandra Group Of Ports",
            "port_name": "Satpati"
        },
        {
            "port_group": "Bandra Group Of Ports",
            "port_name": "Kelwa mahim"
        },
        {
            "port_group": "Bandra Group Of Ports",
            "port_name": "Arnala"
        },
        {
            "port_group": "Bandra Group Of Ports",
            "port_name": "Uttan"
        },
        {
            "port_group": "Bandra Group Of Ports",
            "port_name": "Versova"
        },
        {
            "port_group": "Bandra Group Of Ports",
            "port_name": "Marve-Manori"
        },
        {
            "port_group": "Bandra Group Of Ports",
            "port_name": "Bandra"
        },
        {
            "port_group": "Mora Group Port",
            "port_name": "Trombay"
        },
        {
            "port_group": "Mora Group Port",
            "port_name": "Panvel (Ulva - Belapur)"
        },
        {
            "port_group": "Mora Group Port",
            "port_name": "Mora"
        },
        {
            "port_group": "Mora Group Port",
            "port_name": "Karanja (Rewas-Dharamtar)"
        },
        {
            "port_group": "Mora Group Port",
            "port_name": "Mandawa"
        },
        {
            "port_group": "Mora Group Port",
            "port_name": "Thane"
        },
        {
            "port_group": "Mora Group Port",
            "port_name": "Bhiwandi"
        },
        {
            "port_group": "Mora Group Port",
            "port_name": "Vasai"
        },
        {
            "port_group": "Mora Group Port",
            "port_name": "Kalyan"
        },
        {
            "port_group": "Rajpuri Group of Ports",
            "port_name": "Thal"
        },
        {
            "port_group": "Rajpuri Group of Ports",
            "port_name": "Alibaug"
        },
        {
            "port_group": "Rajpuri Group of Ports",
            "port_name": "Rewdanda"
        },
        {
            "port_group": "Rajpuri Group of Ports",
            "port_name": "Borli-Mandla"
        },
        {
            "port_group": "Rajpuri Group of Ports",
            "port_name": "Nandgaon "
        },
        {
            "port_group": "Rajpuri Group of Ports",
            "port_name": "Murud"
        },
        {
            "port_group": "Rajpuri Group of Ports",
            "port_name": "Dighi"
        },
        {
            "port_group": "Rajpuri Group of Ports",
            "port_name": "Mandad"
        },
        {
            "port_group": "Rajpuri Group of Ports",
            "port_name": "Kumbharu"
        },
        {
            "port_group": "Rajpuri Group of Ports",
            "port_name": "Shriwardhan"
        },
        {
            "port_group": "Ratnagiri Group Of Ports",
            "port_name": "Bankot"
        },
        {
            "port_group": "Ratnagiri Group Of Ports",
            "port_name": "Borya"
        },
        {
            "port_group": "Ratnagiri Group Of Ports",
            "port_name": "Dabhol"
        },
        {
            "port_group": "Ratnagiri Group Of Ports",
            "port_name": "Harnai"
        },
        {
            "port_group": "Ratnagiri Group Of Ports",
            "port_name": "Jaigad"
        },
        {
            "port_group": "Ratnagiri Group Of Ports",
            "port_name": "Kelashi"
        },
        {
            "port_group": "Ratnagiri Group Of Ports",
            "port_name": "Palshet"
        },
        {
            "port_group": "Ratnagiri Group Of Ports",
            "port_name": "Ratnagiri"
        },
        {
            "port_group": "Ratnagiri Group Of Ports",
            "port_name": "Varwade"
        },
        {
            "port_group": "Vengurla Group Of Ports",
            "port_name": "Aachare"
        },
        {
            "port_group": "Vengurla Group Of Ports",
            "port_name": "Devgad"
        },
        {
            "port_group": "Vengurla Group Of Ports",
            "port_name": "Purngad"
        },
        {
            "port_group": "Vengurla Group Of Ports",
            "port_name": "Vijaydurg"
        },
        {
            "port_group": "Vengurla Group Of Ports",
            "port_name": "Jaitapur"
        },
        {
            "port_group": "Vengurla Group Of Ports",
            "port_name": "Kiranpani"
        },
        {
            "port_group": "Vengurla Group Of Ports",
            "port_name": "Redi"
        },
        {
            "port_group": "Vengurla Group Of Ports",
            "port_name": "Niwati "
        },
        {
            "port_group": "Vengurla Group Of Ports",
            "port_name": "Vengurla"
        },
        {
            "port_group": "Vengurla Group Of Ports",
            "port_name": "Malvan"
        }
    ];

在这一回应中 port\u组 都是一样的 port\u端口组的名称 是不同的

这是。ts代码

var newJsonFile = _.uniqBy(jsonarray, 'port_group'); 
   //var filtered =  _.uniqWith(jsonarray, _.isEqual);
  this.information = newJsonFile;

这是我使用此代码后得到的

我得到的结果是:

Bandra端口组

• 达哈努

但我需要这个结果:

Bandra端口组

• 达哈努
• 达拉布尔
• 纳瓦普尔
• 萨特帕蒂
• 凯尔瓦·马希姆
• 阿纳拉
• 维索瓦

请帮助解决此问题。