CODEWITHSUNDEEP
javascriptreactjslodash
user1250264
user1250264

Reputation: 905

lodash .filter an array with subarray for a field value

I have an array of many json records, which each array contains a subarray. I would like to go thru each array and each of its subarray. there is a field and if the subarray field contains a value like 0, it stops and return a true. basically, stop looping and return a true of the first incident of a 0 value for the code field.

Here is my array/subarray structure

[{id: 0, name: 'test0', mySubArray[{id:0, code: 0},{id:1, code: 1}, {id:2, code: 2} ] }
{id: 1, name: 'test1', mySubArray[{id:1, code: 1},{id:2, code: 2}, {id:3, code: 3} ] }
]

Currenty my code is

getExists() {
exist = this.rows.map(row => (this.doesValueExists(row.mySubArray)))

return exist
}

in my other method

doesValueExists(subArrray) {
 let result = _.filter(subArray, 'code', 0)

 return result
}

Using lodash, I tried something like this but it did not work

const result = _.map(row, mySubArray => _.filter(mySubArray, 'code', 0))

I am not familiar with lodash, but is there a better way to do this instead of making two calls?

Thanks and appreciated

Upvotes: 0

Views: 542

Answers (1)

KiwixLV
KiwixLV

Reputation: 246

In this case I would use Array.some() method and loop trough each array and it's sub array until "code" is equal to 0. The end code could look like:

const result = values.some(item => item.mySubArray.some(subArray => subArray.code === 0));

"result" value will contain "true" if one of your sub array "code" value is 0.

Upvotes: 1

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