How to correctly pass the array and enter a new field with an array?

Question

JavaScript

result.map((item, index) => {
    if(item.detailArticle === result[index++].detailArticle){
        return {
            id: item.makerId,
            detailBrand: item.maker,
            detailArticle: item.number,
            detailName: item.description,
            offers: result.map((itm) => {
                if(item.makerId === itm.makerId) {
                    return itm.description
                }
            })
        }
    }
}))

help with a simple advice on how to go through the array of objects as correctly and quickly as possible, if the field matches, write all such objects in the offers field of the new object, that is, how to collect everything into one