How can I ignore certain returned values from array destructuring?
Can I avoid declaring a useless variable when array destructuring when I am only interested in array values beyond index 0?
Yes, if you leave the first index of your assignment empty, nothing will be assigned. This behavior is explained here.
// The first value in array will not be assignedconst [, b, ...rest] = [1, 2, 3, 4, 5];console.log(b, rest);You can use as many commas as you like wherever you like, except after a rest element:
const [, , three] = [1, 2, 3, 4, 5];console.log(three);const [, two, , four] = [1, 2, 3, 4, 5];console.log(two, four);The following produces an error:
const [, ...rest,] = [1, 2, 3, 4, 5];console.log(rest);