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El lado izquierdo de una expresión 'in' debe ser un identificador privado o del tipo 'cualquiera', 'cadena', 'número' o 'símbolo'

Cómo corregir este tipo de error, incluso si ya definí un tipo de cadena para el parámetro clave.

 function checkIsExistObjectKeys(object: Object, key: String): Boolean { return key in object; } console.log( checkIsExistObjectKeys( { name: "john", lastName: "Francois", }, "name" ) );

ingrese la descripción de la imagen aquí

about 4 years ago · Juan Pablo Isaza
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El parámetro clave debe ser de tipo string , no de String .

about 4 years ago · Juan Pablo Isaza Report

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function checkIsExistObjectKeys(object: Object, key: string): boolean { return Object.keys(object).some(x => x === key); }
about 4 years ago · Juan Pablo Isaza Report
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