let event = [
    {
        "vendorBidId": 58,
        "participantName": "[email protected]",
        "bidAmount": 10000,
        "productionRate": 10000,
        "bidTime": "2021-10-21T14:55:05.957324",
        "isYou": false,
        "awarded": false
    },
    {
        "vendorBidId": 57,
        "participantName": "[email protected]",
        "bidAmount": 20000,
        "productionRate": 20000,
        "bidTime": "2021-10-21T14:50:24.493522",
        "isYou": false,
        "awarded": true
    },
    {
        "vendorBidId": null,
        "participantName": "bro [email protected]",
        "bidAmount": 0,
        "productionRate": null,
        "bidTime": null,
        "isYou": false,
        "awarded": false
    },
    {
        "vendorBidId": null,
        "participantName": "[email protected]",
        "bidAmount": 0,
        "productionRate": null,
        "bidTime": null,
        "isYou": true,
        "awarded": false
    }
]

Here I want to find the minimum bidAmount, but after checking below condition,

1. Skip if vendorBidId is null

I tried to do like this.

let minimum = event.reduce(function(prev, curr) {
    return prev.bidAmount < curr.bidAmount ? prev : curr;
});

But and tried to add my condition also. But doesn't work well.

I want just the minimum bidAmount (skip for vendorBidId is null) only.

CodePudding user response：

Math.min on a Filter and map

let event = [{ "vendorBidId": 58, "participantName": "[email protected]", "bidAmount": 10000, "productionRate": 10000, "bidTime": "2021-10-21T14:55:05.957324", "isYou": false, "awarded": false }, { "vendorBidId": 57, "participantName": "[email protected]", "bidAmount": 20000, "productionRate": 20000, "bidTime": "2021-10-21T14:50:24.493522", "isYou": false, "awarded": true }, { "vendorBidId": null, "participantName": "bro [email protected]", "bidAmount": 0, "productionRate": null, "bidTime": null, "isYou": false, "awarded": false }, { "vendorBidId": null, "participantName": "[email protected]", "bidAmount": 0, "productionRate": null, "bidTime": null, "isYou": true, "awarded": false } ]

const min = Math.min(...event.filter(evt => evt.vendorBidId).map(({bidAmount}) => bidAmount))

console.log(min)

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CodePudding user response：

Using reduce is a simple approach (if you want the entire object).

If you just need the minimum vakue, you can use Math.min after mapping the minAmount key values.

  let event = [
    {
        "vendorBidId": 58,
        "participantName": "[email protected]",
        "bidAmount": 10000,
        "productionRate": 10000,
        "bidTime": "2021-10-21T14:55:05.957324",
        "isYou": false,
        "awarded": false
    },
    {
        "vendorBidId": 57,
        "participantName": "[email protected]",
        "bidAmount": 20000,
        "productionRate": 20000,
        "bidTime": "2021-10-21T14:50:24.493522",
        "isYou": false,
        "awarded": true
    },
    {
        "vendorBidId": null,
        "participantName": "bro [email protected]",
        "bidAmount": 0,
        "productionRate": null,
        "bidTime": null,
        "isYou": false,
        "awarded": false
    },
    {
        "vendorBidId": null,
        "participantName": "[email protected]",
        "bidAmount": 0,
        "productionRate": null,
        "bidTime": null,
        "isYou": true,
        "awarded": false
    }
]

const min = event.reduce(function(prev, curr) {
    return prev.bidAmount < curr.bidAmount && curr.vendorBidId ? prev : curr;
});

console.log(min);

var minValue = Math.min(...event.map(item => item.vendorBidId ?   item.bidAmount : 0));

console.log(minValue);

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