Class Map

src/Map.js:34–149

import assertNotInfinite from './utils/assertNotInfinite';

export class Map extends KeyedCollection {
  // @pragma Construction

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

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

  // @pragma Access

  get(k, notSetValue) {
    return this._root
      ? this._root.get(0, undefined, k, notSetValue)
      : notSetValue;
  }

  // @pragma Modification

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

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

  deleteAll(keys) {
    const collection = Collection(keys);

    if (collection.size === 0) {
      return this;
    }

    return this.withMutations((map) => {
      collection.forEach((key) => map.remove(key));
    });
  }

  clear() {
    if (this.size === 0) {
      return this;
    }
    if (this.__ownerID) {
      this.size = 0;
      this._root = null;
      this.__hash = undefined;