Method constructor

src/Map.js:37–48

(value)

  // @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 {', '}');