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How can I obtain the element-wise logical NOT of a pandas Series?
...t results may vary depending on many factors including hardware, compiler, OS, Python, NumPy and Pandas versions.
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TCP vs UDP on video stream
...pliances are not designed with TCP streaming in mind. If you use TCP, the OS must buffer the unacknowledged segments for every client. This is undesirable, particularly in the case of live events; presumably your list of simultaneous clients is long due to the singularity of the event. Pre-record...
App Inventor 2 向心力实验App - 探究向心力F与角速度ω、半径r、质量m的关...
...实验探究向心力，但现有实验器材（手摇向心力演示仪）操作不便、精度低。本App利用手机内置传感器，实现低成本、高精度的向心力探究实验。
1.1 与 phyphox 的区别
phyphox（德国亚琛工业大学开发）可以测量向心加速度 a = ...
Why malloc+memset is slower than calloc?
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The short version: Always use calloc() instead of malloc()+memset(). In most cases, they will be the same. In some cases, calloc() will do less work because it can skip memset() entirely. In other cases, calloc() can even cheat and not allocate any memory! However, malloc()+memset() will always...
Can local storage ever be considered secure? [closed]
...ion, local script injection, browser cache poisoning, and DNS redirects. Those attacks only work if the user uses the machine after it has been compromised. Nevertheless, physical access in such a scenario means you have bigger problems.
So keep in mind that the limited scenario where local crypto ...
AES Encryption for an NSString on the iPhone
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Since you haven't posted any code, it's difficult to know exactly which problems you're encountering. However, the blog post you link to does seem to work pretty decently... aside from the extra comma in each call to CCCrypt() which caused comp...
Will HTML5 allow web apps to make peer-to-peer HTTP connections?
Is it possible to create a web app that, with the help of a central server, could create direct connections with other users of the same web app? I'm imagining a process similar to UDP hole punching.
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Postfix发信的频率控制几个参数 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...命令完成的时间。缺省值为1000秒。
4． 限制文件锁定的操作时间
deliver_lock_attempts：设置锁定一个文件的最大尝试次数。缺省值为5次。
deliver_lock_delay：设置如果锁定一个文件失败后再次尝试的等待时间，缺省值为1秒。
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Read a text file using Node.js?
...g system. However, reading the file as such requires you to do your own (possibly) incremental parsing/processing of the file and some amount of buffering might be inevitable.
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Can I change the root EBS device of my amazon EC2 instance?
...ernate EBS volume as the root: /dev/sda1
Start the instance.
This presupposes that your alternate EBS volume is bootable, of course - it has to contain the bootable OS image.
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