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obtener el elemento json anterior en Json

Tengo un archivo JSON titulado stuff.json. Estoy tratando de obtener el elemento json anterior dado un elemento determinado. Por ejemplo, si me dan la clave ["también-al azar-aquí"], ¿cómo obtengo el elemento JSON anterior "nombre de muestra"?

Mis datos JSON se ven de la siguiente manera:

 { "random-name-here": { "name": "name is item1" }, "sample-name": { "name": "name is item2" }, "also-random-here": { "name": "name is item3" } }
about 4 years ago · Juan Pablo Isaza
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prueba esto

 var names={ "random-name-here": { "name": "name is item1" }, "sample-name": { "name": "name is item2" }, "also-random-here": { "name": "name is item3" } }; var prevName= findPrevName(names, "also-random-here") ; function findPrevName(item, key) { var prevName; for (const property in item) { if(property==key) break; prevName=property; }; return { [prevName]: item[prevName]}; };
about 4 years ago · Juan Pablo Isaza Report
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