Elixir also has a function called Map.take/2, that accepts a map and a list of keys, and it returns a map with only the keys given to list of keys.
趋势三：行业回归产品本质，全面迈入合规时代不管AI对美业如何智能化改造，美业的核心竞争力永远是产品效果本身。仪器之所以成为本届美博会的热门赛道、参展厂商大幅增多，核心在于仪器能破解门店人力成本高、服务难以标准化、效果不直观的痛点，实现效果可视化、服务流程化，精准契合行业降本增效的核心诉求。
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Alt screen memory is now allocated on demand, saving several megabytes per
more than "our method makes the number go up by 2%".，这一点在官网中也有详细论述