@visx/vendor/vendor-cjs/d3-scale/src/ordinal.js

vendored packages for visx

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = ordinal;
exports.implicit = void 0;
var _index = require("../../../vendor-cjs/d3-array/src/index.js");
var _init = require("./init.js");
const implicit = Symbol("implicit");
exports.implicit = implicit;
function ordinal() {
  var index = new _index.InternMap(),
    domain = [],
    range = [],
    unknown = implicit;
  function scale(d) {
    let i = index.get(d);
    if (i === undefined) {
      if (unknown !== implicit) return unknown;
      index.set(d, i = domain.push(d) - 1);
    }
    return range[i % range.length];
  }
  scale.domain = function (_) {
    if (!arguments.length) return domain.slice();
    domain = [], index = new _index.InternMap();
    for (const value of _) {
      if (index.has(value)) continue;
      index.set(value, domain.push(value) - 1);
    }
    return scale;
  };
  scale.range = function (_) {
    return arguments.length ? (range = Array.from(_), scale) : range.slice();
  };
  scale.unknown = function (_) {
    return arguments.length ? (unknown = _, scale) : unknown;
  };
  scale.copy = function () {
    return ordinal(domain, range).unknown(unknown);
  };
  _init.initRange.apply(scale, arguments);
  return scale;
}