I have this function:
getExercisesByMuscles () {
return Object.entries(
this.state.exercises.reduce((exercises, exercise) => {
const { muscles } = exercise
exercises[muscles] = exercises[muscles]
? [...exercises[muscles], exercise]
: [exercise]
return exercises
}, {})
)
}
It works until recently i started getting this error :
Is there something I’m doing wrong here? please help !