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Cómo agrupar por dos campos en Javascript

Necesito agrupar por código de categoría y nombre de categoría y otros campos para agregar con objeto. Data de muestra:

 [ { "categoryCode":"categoryCode1", "categoryName":"categoryName1", "cat_type":A }, { "categoryCode":"categoryCode1", "categoryName":"categoryName1", "cat_type":B }, { "categoryCode":"categoryCode2", "categoryName":"categoryName2", "cat_type":B } ]

aunque Javascript necesito el resultado esperado:

 [ { "categoryCode":"categoryCode1", "categoryName":"categoryName1", "cat_type":[A,B] }, { "categoryCode":"categoryCode2", "categoryName":"categoryName2", "cat_type":[B] } ]

¿Cómo lograr esto?

about 4 years ago · Juan Pablo Isaza
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0

Puedes lograr eso con reducir.

 const arr = [{ "categoryCode": "categoryCode1", "categoryName": "categoryName1", "cat_type": "A" }, { "categoryCode": "categoryCode1", "categoryName": "categoryName1", "cat_type": "B" }, { "categoryCode": "categoryCode2", "categoryName": "categoryName2", "cat_type": "B" } ] const result = Object.values( arr.reduce((a, { categoryCode, categoryName, cat_type }) => (((a[`code_${categoryCode}_name_${categoryName}`] ??= { categoryCode, categoryName, cat_type: [] }).cat_type.push(cat_type)), a), {}) ); console.log(result)

about 4 years ago · Juan Pablo Isaza Report
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