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import { mean } from './mean.js'
export function median(list){  const len = list.length  if (len === 0) return NaN  const width = 2 - len % 2  const idx = (len - width) / 2
  return mean(Array.prototype.slice    .call(list, 0)    .sort((a, b) => {      if (a === b) return 0
      return a < b ? -1 : 1    })    .slice(idx, idx + width))}