Security researchers claim Persona, the provider behind Discord's UK age verification 'experiment', performs '269 individual verification checks' on user data, including those for terrorism and espionage
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，更多细节参见同城约会
Many programmers use malloc() and free() and pay no more mind to "allocating memory", but I often find 2-20× speed improvements by rethinking memory
* 桶排序（简化版：适用于0~max的整数）