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ERROR: TypeError: no se pueden leer las propiedades de undefined (leyendo 'indexOf')

En este código, tengo un error que dice "No se pueden leer las propiedades de undefined (leyendo 'indexOf')"

 lowPassword(control: FormControl): { [lowLevelPassword: string]: boolean; } { if (this.invalidPassword.indexOf(control.value) != -1) { return { lowLevelPassword: true, }; } return null; }
about 4 years ago · Santiago Gelvez
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invalidPassword es una matriz como => [{id: 1, nombre:'john'}] control.value es una clave como => control.value = nombre

si hay un nombre como clave en la matriz invalidPassword, devuelve verdadero, de lo contrario, falso

Ejemplo:

(control.value en invalidPassword) ? 'disponible' : 'ninguno'

about 4 years ago · Santiago Gelvez Report
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