src/utils.ts

   1 import type { WorkerChoiceStrategyOptions } from './pools/selection-strategies/selection-strategies-types'
   2
   3 /**
   4  * An intentional empty function.
   5  */
   6 export const EMPTY_FUNCTION: () => void = Object.freeze(() => {
   7   /* Intentionally empty */
   8 })
   9
  10 /**
  11  * Default worker choice strategy options.
  12  */
  13 export const DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS: WorkerChoiceStrategyOptions =
  14   {
  15     medRunTime: false
  16   }
  17
  18 /**
  19  * Compute the median of the given data set.
  20  *
  21  * @param dataSet - Data set.
  22  * @returns The median of the given data set.
  23  */
  24 export const median = (dataSet: number[]): number => {
  25   if (Array.isArray(dataSet) && dataSet.length === 0) {
  26     return 0
  27   }
  28   if (Array.isArray(dataSet) && dataSet.length === 1) {
  29     return dataSet[0]
  30   }
  31   const sortedDataSet = dataSet.slice().sort((a, b) => a - b)
  32   if (sortedDataSet.length % 2 === 0) {
  33     return sortedDataSet[sortedDataSet.length / 2]
  34   }
  35   return (
  36     (sortedDataSet[(sortedDataSet.length - 1) >> 1] +
  37       sortedDataSet[sortedDataSet.length >> 1]) /
  38     2
  39   )
  40 }
  41
  42 export const isPlainObject = (obj: unknown): boolean =>
  43   typeof obj === 'object' &&
  44   obj !== null &&
  45   obj?.constructor === Object &&
  46   Object.prototype.toString.call(obj) === '[object Object]'