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How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer? [closed]
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You can download a Java Portable from PortableApps.com. It will not change your system settings...
What is an SSTable?
...ed in the form of SSTables.
SSTable (directly mapped to GFS) is key-value based immutable storage. It stores chunks of data, each is of 64KB.
Definitions:
Index of the keys: key and starting location
Chunk is a storage unit in GFS, replica management are by chunk
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How do I analyze a program's core dump file with GDB when it has command-line parameters?
...2'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000564583cf2759 in myfunc (i=3) at main.c:7
7 *(int*)(NULL) = i; /* line 7 */
(gdb) bt
#0 0x0000564583cf2759 in myfunc (i=3) at main.c:7
#1 0x0000564583cf2858 in main (argc=3, argv=0x7ffcca4effa8) at main.c:2
So not...
Copy a file in a sane, safe and efficient way
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With C++17 the standard way to copy a file will be including the <filesystem> header and ...
How does RegexOptions.Compiled work?
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1) Base Class Library Team on compiled regex
2) Coding Horror, referencing #1 with some good points on the tradeoffs
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Increasing (or decreasing) the memory available to R processes
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From:
http://gking.harvard.edu/zelig/docs/How_do_I2.html (mirror)
Windows users may get t...
How to make/get a multi size .ico file? [closed]
...ick in front of any commands.
magick convert icon-16.png icon-32.png icon-64.png icon-128.png icon.ico
See also http://www.imagemagick.org/Usage/thumbnails/#favicon, that has the example:
magick convert image.png -bordercolor white -border 0 \
\( -clone 0 -resize 16x16 \) \
\...
数据存储组件 · App Inventor 2 中文网
...享 ：文件将从设备的共享媒体目录中读取和写入，例如图片目录。
注1：在 兼容 模式下，文件名可以采用以下三种形式之一：
私有文件：没有前导 / ，写入应用程序私有存储（例如，file.txt）
外部文件：有一...
Can I install Python windows packages into virtualenvs?
... I tried to do this, but got an error wheel convert numpy-MKL-1.8.1.win-amd64-py2.7.exe then pip install numpy-1.8.1-cp27-none-win_amd64.whl i get the following error Downloading/unpacking numpy-1.8.1-cp27-none-win-amd64.whl Could not find any downloads that satisfy the requirement numpy-1.8.1-cp...
内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...glibc malloc版本。
ptmalloc原理
系统调用接口
上图是 x86_64 下 Linux 进程的默认地址空间, 对 heap 的操作, 操作系统提供了brk()系统调用，设置了Heap的上边界； 对 mmap 映射区域的操作,操作系 统 供了 mmap()和 munmap()函数。
因为系统...