test: improve median computation test
[poolifier.git] / src / utils.ts
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1import type { WorkerChoiceStrategyOptions } from './pools/selection-strategies/selection-strategies-types'
2
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3/**
4 * An intentional empty function.
5 */
4f3c3d89 6export const EMPTY_FUNCTION: () => void = Object.freeze(() => {
6e9d10db 7 /* Intentionally empty */
4f3c3d89 8})
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9
10/**
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11 * Default worker choice strategy options.
12 */
13export const DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS: WorkerChoiceStrategyOptions =
14 {
15 medRunTime: false
16 }
17
18/**
19 * Compute the median of the given data set.
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20 *
21 * @param dataSet - Data set.
22 * @returns The median of the given data set.
23 */
24export const median = (dataSet: number[]): number => {
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25 if (Array.isArray(dataSet) && dataSet.length === 0) {
26 return 0
27 }
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28 if (Array.isArray(dataSet) && dataSet.length === 1) {
29 return dataSet[0]
30 }
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31 const sortedDataSet = dataSet.slice().sort((a, b) => a - b)
32 return (
33 (sortedDataSet[(sortedDataSet.length - 1) >> 1] +
34 sortedDataSet[sortedDataSet.length >> 1]) /
35 2
36 )
78099a15 37}
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38
39export const isPlainObject = (obj: unknown): boolean =>
40 typeof obj === 'object' &&
41 obj !== null &&
42 obj?.constructor === Object &&
43 Object.prototype.toString.call(obj) === '[object Object]'