Simple array to objects with changing key

I got a comma seperated list

var arr = [1,2,3,4]

and want it to be:

var new_arr = [
 {x:1, y:2},
 {x:3, y:4}
]

Struggeling how to get the key/value change done.

>Solution :

You could use Array.reduce() to return the desired result.

If the element index is even, add a new item to the result, if not skip it.

const input = [1,2,3,4]
 
const result = input.reduce((acc, el, idx, arr) => { 
    return (idx % 2) ? acc : [...acc,  { x: el, y: arr[idx + 1]} ];
}, []);
 
console.log('Result:', result);

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