| 123456789101112131415161718192021222324252627282930313233 | 'use strict'function reusify (Constructor) {  var head = new Constructor()  var tail = head  function get () {    var current = head    if (current.next) {      head = current.next    } else {      head = new Constructor()      tail = head    }    current.next = null    return current  }  function release (obj) {    tail.next = obj    tail = obj  }  return {    get: get,    release: release  }}module.exports = reusify
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