Is there a way to dynamically generate an array of a specific length without knowing its values in advance? For instance, if I need an array of 3 elements, it should be [-10, 0, 10], and for an array of 9 elements, it would look like [-40, -30, -20, -10, 0, 10, 20, 30, 40]. How can I achieve this automatically?
If you need to obtain the desired outcome, you can easily achieve it by utilizing the Array method in conjunction with fill
To ensure that only a 0 is at the center of the input, it is essential for the input to be of odd value.
const end = 9;
let start = Math.floor(end / 2);
const result = [
...Array(start).fill(0).map((_, i) => start * -10 + i * 10),
0,
...Array(start).fill(0).map((_, i) => (i + 1) * 10)
]
console.log(result)Here's an alternative approach using the Array.from method:
const generateArray = (size) => Array.from({length: size}, (element, index) => Math.round(index - size / 2) * 10);
console.log(generateArray(1))
console.log(generateArray(3))
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