Method _setFactValue

src/almanac.js:85–92

* Sets the computed value of a fact * @param {Fact} fact * @param {Object} params - values for differentiating this fact value from others, used for cache key * @param {Mixed} value - computed value

(fact, params, value)

   * @param {Mixed} value - computed value
   */
  _setFactValue (fact, params, value) {
    const cacheKey = fact.getCacheKey(params)
    const factValue = Promise.resolve(value)
    if (cacheKey) {
      this.factResultsCache.set(cacheKey, factValue)
    }
    return factValue
  }

  /**
   * Add a fact definition to the engine.  Facts are called by rules as they are evaluated.