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Current Path : /proc/thread-self/root/usr/lib/nodejs/npm/node_modules/once/
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Current File : //proc/thread-self/root/usr/lib/nodejs/npm/node_modules/once/once.js

var wrappy = require('wrappy')
module.exports = wrappy(once)

once.proto = once(function () {
  Object.defineProperty(Function.prototype, 'once', {
    value: function () {
      return once(this)
    },
    configurable: true
  })
})

function once (fn) {
  var f = function () {
    if (f.called) return f.value
    f.called = true
    return f.value = fn.apply(this, arguments)
  }
  f.called = false
  return f
}