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     runTime: { median: false },
  16     waitTime: { median: false }
  17   }
  18
  19 /**
  20  * Compute the median of the given data set.
  21  *
  22  * @param dataSet - Data set.
  23  * @returns The median of the given data set.
  24  */
  25 export const median = (dataSet: number[]): number => {
  26   if (Array.isArray(dataSet) && dataSet.length === 0) {
  27     return 0
  28   }
  29   if (Array.isArray(dataSet) && dataSet.length === 1) {
  30     return dataSet[0]
  31   }
  32   const sortedDataSet = dataSet.slice().sort((a, b) => a - b)
  33   return (
  34     (sortedDataSet[(sortedDataSet.length - 1) >> 1] +
  35       sortedDataSet[sortedDataSet.length >> 1]) /
  36     2
  37   )
  38 }
  39
  40 /**
  41  * Is the given object a plain object?
  42  *
  43  * @param obj - The object to check.
  44  * @returns `true` if the given object is a plain object, `false` otherwise.
  45  */
  46 export const isPlainObject = (obj: unknown): boolean =>
  47   typeof obj === 'object' &&
  48   obj !== null &&
  49   obj?.constructor === Object &&
  50   Object.prototype.toString.call(obj) === '[object Object]'