Public
Edited
Apr 14, 2023
function getNextCombination(combination, n) {
if (!combination) return null;
// get index of next element to increment
const nextIndex = combination.reduceRight((a, v, i, arr) => arr[i+1] - v > 1 ? i : a, combination.length-1);
// guard against exceeding `n`
if (combination[nextIndex] > n) return null;
// increment elements into a new combination
return combination.map((v, i) => {
if (i < nextIndex) return i;
if (i === nextIndex) return v + 1;
if (i > nextIndex) return v;
});
}
function shuffleAndSort(arr, onKey) {
if (!onKey) {
return arr.sort((a, b) => a !== b ? a - b : Math.random() - 0.5);
}
return arr.sort((a, b) => a[onKey] !== b[onKey]
? a[onKey] - b[onKey]
: Math.random() - 0.5);
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
