S.M_Emamian
Reputation: 17383
How to find out similar objects in array - react js
I have seen similar questions about duplicate objects.
my json output:
{ "coupons": [
{
"id": "376363",
"price": "14400",
"date": "2018-04-08 10:40:17",
"user_id": "16433",
"ip": "46.225.123.235",
"code": "5ac9b249a0cc5",
"succ": "1",
"admin_seen": "1",
"user_seen": "0",
"coupon_id": "20821",
"coupon_parent": "20821",
"coupon_code": "195_2484C1_9873(7531)",
"coupon_code_user": "7531",
"coupon_code_partner": "195_2484C1_9873",
"shop_id": "2484",
"payment_type": "7",
"merchent_type": "3",
"merchent_id": "0",
"cradit_start_date": "2018-03-24 05:05:05",
"cradit_end_date": "2018-04-22 05:05:05",
"expired": "0",
"pay_data": null,
"seri": "C",
"to_friend": "0",
"finance_id": "0",
"app": "web",
"expire_date": "0000-00-00 00:00:00",
"expire_app": "",
"buy_id": "5ac9b249970c2",
"coupon_property_id": "0",
"title": "title1",
"coupon_property_title": "",
"parent_title": ""
},
{
"id": "376362",
"price": "14400",
"date": "2018-04-08 10:40:17",
"user_id": "16433",
"ip": "46.225.123.235",
"code": "5ac9b24997103",
"succ": "1",
"admin_seen": "1",
"user_seen": "0",
"coupon_id": "20821",
"coupon_parent": "20821",
"coupon_code": "194_2484C1_9779(4478)",
"coupon_code_user": "4478",
"coupon_code_partner": "194_2484C1_9779",
"shop_id": "2484",
"payment_type": "7",
"merchent_type": "3",
"merchent_id": "0",
"cradit_start_date": "2018-03-24 05:05:05",
"cradit_end_date": "2018-04-22 05:05:05",
"expired": "0",
"pay_data": null,
"seri": "C",
"to_friend": "0",
"finance_id": "0",
"app": "web",
"expire_date": "0000-00-00 00:00:00",
"expire_app": "",
"buy_id": "5ac9b249970c2",
"coupon_property_id": "0",
"title": "title2",
"coupon_property_title": "",
"parent_title": ""
},
{
"id": "341459",
"price": "27000",
"date": "2017-03-07 10:42:47",
"user_id": "16433",
"ip": "46.225.76.21",
"code": "58be5d6fd7214",
"succ": "1",
"admin_seen": "1",
"user_seen": "0",
"coupon_id": "19457",
"coupon_parent": "19457",
"coupon_code": "7_1310B1_2389(3386)",
"coupon_code_user": "3386",
"coupon_code_partner": "7_1310B1_2389",
"shop_id": "1310",
"payment_type": "7",
"merchent_type": "3",
"merchent_id": "0",
"cradit_start_date": "2017-01-16 05:05:05",
"cradit_end_date": "2017-03-19 05:05:05",
"expired": "11",
"pay_data": null,
"seri": "B",
"to_friend": "0",
"finance_id": "0",
"app": "web",
"expire_date": "0000-00-00 00:00:00",
"expire_app": "",
"buy_id": "58be5d6fd71c6",
"coupon_property_id": "0",
"title": "title3",
"coupon_property_title": "",
"parent_title": ""
},
{
"id": "341456",
"price": "11250",
"date": "2017-03-07 10:34:54",
"user_id": "16433",
"ip": "46.225.76.21",
"code": "58be5b964bf1d",
"succ": "1",
"admin_seen": "1",
"user_seen": "0",
"coupon_id": "19724",
"coupon_parent": "19724",
"coupon_code": "16_2129A1_2178(4663)",
"coupon_code_user": "4663",
"coupon_code_partner": "16_2129A1_2178",
"shop_id": "2129",
"payment_type": "7",
"merchent_type": "3",
"merchent_id": "0",
"cradit_start_date": "2017-03-05 05:05:05",
"cradit_end_date": "2017-05-05 05:05:05",
"expired": "11",
"pay_data": null,
"seri": "A",
"to_friend": "0",
"finance_id": "0",
"app": "web",
"expire_date": "0000-00-00 00:00:00",
"expire_app": "",
"buy_id": "58be5b964b1a1",
"coupon_property_id": "0",
"title": "title4",
"coupon_property_title": "",
"parent_title": ""
}
]
}
each object has a buy_id field. buy_id shows that the objects are the same and I should print them inside one row of html table.
for example the first object and the second object are the same depending on buy_id I print them inside row. output:
---------
title1 - title2 //because the first object and second object have same `buy_id`
---------
title3
---------
title4
should I use two maps?
I should use this scenario inside return of render function.
Upvotes: 0
Views: 101
Answers (2)
benjamin Rampon
Reputation: 1416
You have to use reduce :
data.coupons.reduce((acc,value)=>{
return acc[value.buy_id] === undefined
? {...acc,[value.buy_id]:value.title}
: {...acc,[value.buy_id]:`${acc[value.buy_id]} - ${value.title}`}
},{})
The result is :
{
"5ac9b249970c2": "title1 - title2",
"58be5d6fd71c6": "title3",
"58be5b964b1a1": "title4"
}
Upvotes: 0
ben
Reputation: 3568
I put a bet on reduce for that.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce
the following snippets will group your objects by buy_id, then you can render them easily
const data = { "coupons": [
{
"id": "376363",
"price": "14400",
"date": "2018-04-08 10:40:17",
"user_id": "16433",
"ip": "46.225.123.235",
"code": "5ac9b249a0cc5",
"succ": "1",
"admin_seen": "1",
"user_seen": "0",
"coupon_id": "20821",
"coupon_parent": "20821",
"coupon_code": "195_2484C1_9873(7531)",
"coupon_code_user": "7531",
"coupon_code_partner": "195_2484C1_9873",
"shop_id": "2484",
"payment_type": "7",
"merchent_type": "3",
"merchent_id": "0",
"cradit_start_date": "2018-03-24 05:05:05",
"cradit_end_date": "2018-04-22 05:05:05",
"expired": "0",
"pay_data": null,
"seri": "C",
"to_friend": "0",
"finance_id": "0",
"app": "web",
"expire_date": "0000-00-00 00:00:00",
"expire_app": "",
"buy_id": "5ac9b249970c2",
"coupon_property_id": "0",
"title": "title1",
"coupon_property_title": "",
"parent_title": ""
},
{
"id": "376362",
"price": "14400",
"date": "2018-04-08 10:40:17",
"user_id": "16433",
"ip": "46.225.123.235",
"code": "5ac9b24997103",
"succ": "1",
"admin_seen": "1",
"user_seen": "0",
"coupon_id": "20821",
"coupon_parent": "20821",
"coupon_code": "194_2484C1_9779(4478)",
"coupon_code_user": "4478",
"coupon_code_partner": "194_2484C1_9779",
"shop_id": "2484",
"payment_type": "7",
"merchent_type": "3",
"merchent_id": "0",
"cradit_start_date": "2018-03-24 05:05:05",
"cradit_end_date": "2018-04-22 05:05:05",
"expired": "0",
"pay_data": null,
"seri": "C",
"to_friend": "0",
"finance_id": "0",
"app": "web",
"expire_date": "0000-00-00 00:00:00",
"expire_app": "",
"buy_id": "5ac9b249970c2",
"coupon_property_id": "0",
"title": "title2",
"coupon_property_title": "",
"parent_title": ""
},
{
"id": "341459",
"price": "27000",
"date": "2017-03-07 10:42:47",
"user_id": "16433",
"ip": "46.225.76.21",
"code": "58be5d6fd7214",
"succ": "1",
"admin_seen": "1",
"user_seen": "0",
"coupon_id": "19457",
"coupon_parent": "19457",
"coupon_code": "7_1310B1_2389(3386)",
"coupon_code_user": "3386",
"coupon_code_partner": "7_1310B1_2389",
"shop_id": "1310",
"payment_type": "7",
"merchent_type": "3",
"merchent_id": "0",
"cradit_start_date": "2017-01-16 05:05:05",
"cradit_end_date": "2017-03-19 05:05:05",
"expired": "11",
"pay_data": null,
"seri": "B",
"to_friend": "0",
"finance_id": "0",
"app": "web",
"expire_date": "0000-00-00 00:00:00",
"expire_app": "",
"buy_id": "58be5d6fd71c6",
"coupon_property_id": "0",
"title": "title3",
"coupon_property_title": "",
"parent_title": ""
},
{
"id": "341456",
"price": "11250",
"date": "2017-03-07 10:34:54",
"user_id": "16433",
"ip": "46.225.76.21",
"code": "58be5b964bf1d",
"succ": "1",
"admin_seen": "1",
"user_seen": "0",
"coupon_id": "19724",
"coupon_parent": "19724",
"coupon_code": "16_2129A1_2178(4663)",
"coupon_code_user": "4663",
"coupon_code_partner": "16_2129A1_2178",
"shop_id": "2129",
"payment_type": "7",
"merchent_type": "3",
"merchent_id": "0",
"cradit_start_date": "2017-03-05 05:05:05",
"cradit_end_date": "2017-05-05 05:05:05",
"expired": "11",
"pay_data": null,
"seri": "A",
"to_friend": "0",
"finance_id": "0",
"app": "web",
"expire_date": "0000-00-00 00:00:00",
"expire_app": "",
"buy_id": "58be5b964b1a1",
"coupon_property_id": "0",
"title": "title4",
"coupon_property_title": "",
"parent_title": ""
}
]
};
const reducedData = data.coupons.reduce((accumulator, value) => {
accumulator[value.buy_id] = accumulator[value.buy_id] || [];
accumulator[value.buy_id].push(value);
return accumulator;
}, {});
console.log(reducedData);Upvotes: 3
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