JAVASCRIPT

redux update item in array

case 'SOME_ACTION':
   return { 
       ...state, 
       contents: state.contents.map(
           (content, i) => i === 1 ? {...content, text: action.payload}
                                   : content
       )
    }

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function handleChange(value) {

  const updateArray = userVotes.map(
    (item, i) => item.id === id ? {...item, score: value}
    : item
  )
  setUserVotes(updateArray)

}

update a value from array in redux state

state.contents[1].text = action.payload;

update a value from array in redux state

return { 
  ...state, 
  contents: state.contents.map(
      (content, i) => i === 1 ? {...content, text: action.payload}
                              : content
  )
}

update a value from array in redux state

case 'SOME_ACTION':
   return { 
       ...state, 
       contents: state.contents.map(
           (content, i) => i === 1 ? {...content, text: action.payload}
                                   : content
       )
    }