react-native redux - reducer changing array elements -

i have state, part of array called 'numbers'. 1 of actions change state in following way: odd numbers should changed zero, numbers should kept. example:

previous state [9, 3, 2, 6, 8]  action new state [0, 0, 2, 6, 8] 

action creator:

export const turneven = () => {   return {     type: turn_even   }; }; 

reducer:

case turn_even:       return [...state, numbers: state.numbers.map(         (i) => (i % 2 === 0 ? : 0))]; 

this 1 produces error: unexpected token, expected , ... , 'return' line being indicated location of error. please advise

looking @ code you've shared:

case turn_even:       return [...state, numbers: state.numbers.map(         (i) => (i % 2 === 0 ? : 0))]; 

it looks state of reducer has different properties, 1 of them being numbers.

maybe wanted instead:

case turn_even:   return object.assign(     {},     state,     { numbers: state.numbers.map(i => (i % 2 === 0 ? : 0)) }   ); 

i haven't seen rest of reducer, maybe don't have enough context encourage try make reducer each 1 of properties of state, 1 of them numbers , use combinereducers combine them one. small functions easier deal with.

if did that, have reducer 1 numbers:

const initialstate = []; const numbersreducer = (state = initialstate, action) => {   swicth (action.type) {     case turn_even:       return state.map(i => (i % 2 === 0 ? : 0));     // other action types here...     default:       return state;   } }