| import ascending from "./ascending.js"; |
| import {ascendingDefined, compareDefined} from "./sort.js"; |
|
|
| export default function rank(values, valueof = ascending) { |
| if (typeof values[Symbol.iterator] !== "function") throw new TypeError("values is not iterable"); |
| let V = Array.from(values); |
| const R = new Float64Array(V.length); |
| if (valueof.length !== 2) V = V.map(valueof), valueof = ascending; |
| const compareIndex = (i, j) => valueof(V[i], V[j]); |
| let k, r; |
| values = Uint32Array.from(V, (_, i) => i); |
| |
| values.sort(valueof === ascending ? (i, j) => ascendingDefined(V[i], V[j]) : compareDefined(compareIndex)); |
| values.forEach((j, i) => { |
| const c = compareIndex(j, k === undefined ? j : k); |
| if (c >= 0) { |
| if (k === undefined || c > 0) k = j, r = i; |
| R[j] = r; |
| } else { |
| R[j] = NaN; |
| } |
| }); |
| return R; |
| } |
|
|
