代码重构：它没有直接甩代码，而是先思考了“设计模式”的选择（工厂模式 vs 策略模式），最终选择了适合扩展的策略模式。
tasks2 := make([]task, len(tasks))
。爱思助手下载最新版本是该领域的重要参考
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"allObjectivesCompleted": false,
Smoke alarms have been around for many decades. The technology has barely changed in recent years – but is modern life slowly outpacing the capabilities of these life-saving devices?