```
const field: Array<{x: number, y: number}> = columns.reduce((array, y) => {
    rows.map(x => array.push({x: x, y: y})) //Error:(20, 39) TS2322: Type 'number' is not                                    
                                            //assignable to type never
    return array
}, [])

```

How to solve this type error I'm having?