01 2018 档案
摘要：a &= b also means a = a & b true & true ==> true true & false ==> false false & true ==> false false & false ==> false true | true ==> true true | fal
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摘要：Output: It seems the local map valuesHaveBeenSeen is just created once and used throughout the iteration.
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摘要：References: [1] http://rick-hightower.blogspot.co.uk/2014/04/which-is-faster-java-object.html [2] https://www.darkreading.com/informationweek-home/why
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摘要：Traditional Recursion Perform recursive call first, and the do the calculation. Tail Recursion Perform calculation first, then execute the recursive c
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摘要：Reference [1] https://leetcode.com/articles/task-scheduler/ [2] https://www.hackerrank.com/challenges/task-scheduling/problem (hackerrank or interview
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摘要：正向代理 Proxy 代理访问外部资源。它隐藏了真实的请求客户端，服务端不知道真实的客户端是谁，客户端请求的服务都被代理服务器代替来请求。对公司内网来说，代理服务器可以帮助内网用户访问任意外部网址，也可以禁止访问一些网址。 e.g. 国内访问google.com，可以使用代理服务器。 访问原来无法访
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