Need help with appending a new object list within a nested last key value in JavaScript. Here is my initial input:
var list = [12,13,14,15]
Desired output:
list = [{first : 12, sec : 13},{first:13, sec:14},{first:14, sec:15}]
Need help with appending a new object list within a nested last key value in JavaScript. Here is my initial input:
var list = [12,13,14,15]
Desired output:
list = [{first : 12, sec : 13},{first:13, sec:14},{first:14, sec:15}]
To create objects by pairing each element with the next one, iterate through all elements except the last using a traditional for loop.
let data = [12, 13, 14, 15]
let result = [];
for (let i = 0; i < data.length - 1; i++)
results.push({ first: data[i], second: data[i + 1] })
console.log(result);If you want to transform the elements in a list and create a new list with the updated data, the map function is perfect for the job:
var numbers = [5,6,7,8];
const modifiedList = numbers.map(num => ({original: num, incremented: num + 1})).slice(0, -1);
console.log(modifiedList);To combine and process data, you can utilize the .reduce method.
const numbers = [5, 10, 15, 20];
const result = numbers.reduce((accumulator, currentValue, index, array) => {
if(array.length > index + 1)
accumulator.push({first: currentValue, second: array[index+1]})
return accumulator;
}, [])
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