Extract element value out of array of objects

Question

I have an array of objects where I have to find the segmentId of "PUBLICATIONS_OVERVIEW".

"sections": [
0: {
 "title": "CAMPAIGNS",
 "segments": [
 {
 "title": "CAMPAIGN_DA",
 "segmentId": 145
 },
 {
 "title": "CAMPAIGN_IM",
 "segmentId": 146
 },
 {
 "title": "CAMPAIGN_ENG",
 "segmentId": 147
 },
 {
 "title": "CAMPAIGN_DEMO",
 "segmentId": 148
 ]
 },
 {
 "title": "CAMPAIGN_BUDGET",
 "segmentId": 149
 }
 ]
 }
 ]
},
1: {
 "title": "PUBLICATIONS",
 "segments": [
 {
 "title": "PUBLICATIONS_OVERVIEW",
 "segmentId": 150
 },
 {
 "title": "PUBLICATIONS_POSTS",
 "segmentId": 151
 }
 ]
}
]

The code that I have works just fine, but I would like to merge it into one line of code and I can't seem to be able to do it (output is always undefined).

const publicationSegments = this.sections.find(section => section.title === 'PUBLICATIONS');
const segmentId = publicationSegments.segments.find(segment => segment.title === 'PUBLICATIONS_OVERVIEW').segmentId;

I would like to know how it is done properly in one single line of code.

• Barmar: This is not valid. You can't have key: value in an array, only an object.

Answer 1

Just replace publicationSegments with the expression you used to initialize it.

const segmentId = this.sections.find(section => section.title === 'PUBLICATIONS').segments.find(segment => segment.title === 'PUBLICATIONS_OVERVIEW').segmentId;