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var RuleSystem = function() {
  this.rules = []
}
RuleSystem.prototype.add = function(rule) {
  var rule = 'Rule ' + rule
  this.rules.push(function() {
    console.log(rule)
  })
}
var ruleSystem = new RuleSystem()
ruleSystem.add('A')
ruleSystem.add('B')
ruleSystem.rules.forEach(function(fn) {
  fn(); //调用ruleSystem.rules中push进的函数
})
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anonymouspro
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