Class OrderedMap

src/OrderedMap.js:9–93

import assertNotInfinite from './utils/assertNotInfinite';

export class OrderedMap extends Map {
  // @pragma Construction

  constructor(value) {
    // eslint-disable-next-line no-constructor-return
    return value === undefined || value === null
      ? emptyOrderedMap()
      : isOrderedMap(value)
        ? value
        : emptyOrderedMap().withMutations((map) => {
            const iter = KeyedCollection(value);
            assertNotInfinite(iter.size);
            iter.forEach((v, k) => map.set(k, v));
          });
  }

  static of(/*...values*/) {
    return this(arguments);
  }

  toString() {
    return this.__toString('OrderedMap {', '}');
  }

  // @pragma Access

  get(k, notSetValue) {
    const index = this._map.get(k);
    return index !== undefined ? this._list.get(index)[1] : notSetValue;
  }

  // @pragma Modification

  clear() {
    if (this.size === 0) {
      return this;
    }
    if (this.__ownerID) {
      this.size = 0;
      this._map.clear();
      this._list.clear();
      this.__altered = true;
      return this;
    }
    return emptyOrderedMap();
  }

  set(k, v) {
    return updateOrderedMap(this, k, v);
  }

  remove(k) {
    return updateOrderedMap(this, k, NOT_SET);
  }

  __iterate(fn, reverse) {
    return this._list.__iterate(
      (entry) => entry && fn(entry[1], entry[0], this),