I have a comma-separated list that looks like this:
var arr = [1,2,3,4]
and I want to transform it into the following format:
var new_arr = [
{x:1, y:2},
{x:3, y:4}
]
I'm having trouble figuring out how to achieve this key/value transformation.
I have a comma-separated list that looks like this:
var arr = [1,2,3,4]
and I want to transform it into the following format:
var new_arr = [
{x:1, y:2},
{x:3, y:4}
]
I'm having trouble figuring out how to achieve this key/value transformation.
For a solution, you can utilize the Array.reduce() method to achieve the desired outcome.
To implement the logic, consider adding a new element to the result if the index is even, otherwise, proceed to the next iteration.
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);.as-console-wrapper { max-height: 100% !important; }One approach you could take is illustrated in the following example:
To start, iterate over the array and check if the modulus value of the current index is not equal to 0. If it is not, return an empty object (which will be filtered out later). Otherwise, return a new object with the current element as y and the previous element in the array (referenced by index) as x.
const x = [1,2,3,4,5]
const g = x.map((el, i) => {
if(i%2) {
return {
x: x[i - 1],
y: el
}
}
return {}
}).filter(t => Object.keys(t).length)
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