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What does PermGen actually stand for?
...more precisely - limited by amount of native memory, depending on 32 or 64 bit jvm and OS virtual memory availability) . However it is possible to tune it in some ways, by for example specifying a max limit for the area. You can find more useful information in this blog post.
...
How to check if a number is a power of 2
...mp;& ((x & (x - 1)) == 0);
}
Explanation
First and foremost the bitwise binary & operator from MSDN definition:
Binary & operators are predefined for the integral types and bool. For
integral types, & computes the logical bitwise AND of its operands.
For bool operands,...
Formatting a number with exactly two decimals in JavaScript
...(10,decimals)).toFixed(decimals);
}
As you can see I had to add a little bit of "correction" (it's not what it is, but since Math.round is lossy - you can check it on jsfiddle.net - this is the only way I knew how to "fix" it). It adds 0.001 to the already padded number, so it is adding a 1 three ...
【解决】Linux mysql如何重置root密码？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
.... 重设mysql root密码
如果您有MySQL 5.7.6及更高版本或MariaDB 10.1.20及更高版本，请运行以下命令：
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MY_NEW_PASSWORD';
mysql> FLUSH PRIVILEGES;
如果ALTER USER语句不起作用，请尝试直接修改用户表...
Is ASCII code 7-bit or 8-bit?
My teacher told me ASCII is 8-bit character coding scheme. But it is defined only for 0-127 codes which means it can be fit into 7-bits. So can't it be argued that ASCII bit is actually 7-bit code?
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How does the Amazon Recommendation feature work?
...nearest neighbor methods, and neural networks. Here are some papers by the winning team:
R. Bell, Y. Koren, C. Volinsky, "The BellKor 2008 Solution to the Netflix Prize", (2008).
A. Töscher, M. Jahrer, “The BigChaos Solution to the Netflix Prize 2008", (2008).
A. Töscher, M. Jahrer, R. Legens...
When do we need curly braces around shell variables?
...sion. They do different things. I'd upvote you except for the no expansion bit.
– Spencer Rathbun
Jan 5 '12 at 21:52
5
...
Frequency table for a single variable
...vely.
– Nickil Maveli
Dec 20 '16 at 10:04
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show 4 more comments
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获取文件系统映像及恢复删除的数据（FAT文件系统格式描述） - C/C++ - 清泛...
...编代码 (即转到 loader 的起始位置 )
不
3-10
操作系统名称 ( ASCII 形式 )
不
11-12
磁盘扇区的字节数
是
13
一簇的扇区数。这个数许是 2的指数幂，且不能超过 32 Kbyte...
获取文件系统映像及恢复删除的数据（FAT文件系统格式描述） - C/C++ - 清泛...
...编代码 (即转到 loader 的起始位置 )
不
3-10
操作系统名称 ( ASCII 形式 )
不
11-12
磁盘扇区的字节数
是
13
一簇的扇区数。这个数许是 2的指数幂，且不能超过 32 Kbyte...