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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...
...据读取完毕后，这个的数据就加载完毕了。这里还有一个问题，程序根据这个FAT表的簇号依次读取每个簇，则程序怎么知道一个簇读取完毕后这个文件就算读取完毕了？一般地，每个一个记录值为下列表中值，则说明已经读到文...
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...
...据读取完毕后，这个的数据就加载完毕了。这里还有一个问题，程序根据这个FAT表的簇号依次读取每个簇，则程序怎么知道一个簇读取完毕后这个文件就算读取完毕了？一般地，每个一个记录值为下列表中值，则说明已经读到文...
What is “thread local storage” in Python, and why do I need it?
...created a byte-code chunk that left no room for an interrupt signal to the CPU.
I thought atomic operations are chunks of Python byte code that does not give access to interrupts. Python statements like "running = True" is atomic. You do not need to lock CPU from interrupts in this case (I believe)...
JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images
...,
canvas = document.createElement('canvas'),
ctx = canvas.getContext("2d");
// set proper canvas dimensions before transform & export
if (4 < srcOrientation && srcOrientation < 9) {
canvas.width = height;
canvas.height = width;
} else {
...
A fast method to round a double to a 32-bit int explained
...t-of-order execution, altering the fp rounding mode generally seriales the CPU core and is quite expensive. So on a CPU like a Pentium-III or Pentium-IV, this overall cost is quite high -- a normal fp->int conversion is 10x or more expensive than this add+store+load trick.
On x86-64, however, fl...
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...
...据读取完毕后，这个的数据就加载完毕了。这里还有一个问题，程序根据这个FAT表的簇号依次读取每个簇，则程序怎么知道一个簇读取完毕后这个文件就算读取完毕了？一般地，每个一个记录值为下列表中值，则说明已经读到文...
Why does Math.round(0.49999999999999994) return 1?
...s (CPU, 32- or 64-bit mode).
And, when using round or inverting matrices, etc., these bits can make a huge difference.
x64 output:
10.5 rounded is 11
10.499999999999998 rounded is 10
9.5 rounded is 10
9.499999999999998 rounded is 9
8.5 rounded is 9
8.499999999999998 rounded is 8
7.5 rounded is 8
...
What does Redis do when it runs out of memory?
...OC-STATS - Show allocator internal stats"
/usr/local/etc/redis.conf
############################## MEMORY MANAGEMENT ################################
# Set a memory usage limit to the specified amount of bytes.
# When the memory limit is reached Redis will try to remove keys...
Does “display:none” prevent an image from loading?
...ng that there's just a JS solution to the problem (lazy load, picturefill, etc.), it appeared that there's a nice pure HTML solution that comes out of the box with HTML5.
And that is the <picture> tag.
Here's how MDN describes it:
The HTML <picture> element is a container used t...
What platforms have something other than 8-bit char?
...
Control Data mainframes (CDC-6400, 6500, 6600, 7600, Cyber 170, Cyber 176 etc.) 6-bit chars, packed 10 per 60-bit word.
Unisys mainframes: 9 bits/byte
Windows CE: simply doesn't support the `char` type at all -- requires 16-bit wchar_t instead
...