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Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...浮点数会慢（除非大于100,000,000,000,000），或是会有精度问题。你可以以如下的方式表示数字，0x开头的16进制和C是很像的。num = 1024
num = 3.0
num = 3.1416
num = 314.16e-2
num = 0.31416E1
num = 0xff
num = 0x56复制代码
字符串你可以用单引号，也...
When to use Tornado, when to use Twisted / Cyclone / GEvent / other [closed]
... the word "concurrency" to mean "concurrent parallel execution on multiple CPUs". Twisted can do concurrent I/O scheduling via asynchronous (callback-based) I/O. GEvent can do concurrent I/O scheduling via a micro-thread scheduler. In Twisted, using spawnProcess, this I/O scheduling can be transla...
How to read keyboard-input?
... Sleep for a short time to prevent this thread from sucking up all of your CPU resources on your PC.
time.sleep(0.01)
print("End.")
# If you run this Python file directly (ex: via `python3 this_filename.py`), do the following:
if (__name__ == '__main__'):
main()
Sample output:
...
When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
... In todays world, Data Execution Prevention doesn't even allow the CPU to fetch an instruction from the heap. This answer is outdated since XP SP2.
– MSalters
Apr 5 '17 at 8:27
...
Is there any way to put malicious code into a regular expression?
... states at the same time, and backtracking can eat your lunch — and your CPU.
Denial‐of‐Service Solutions
Probably the most reasonable way to address these patterns that are on the losing end of a race with the heat‐death of the universe is to wrap them with a timer that effectively places...
Best practices for exception management in Java or C# [closed]
... of code to get by without it would "resolve" it), or whether it means the CPU is on fire and the system should do a "safety shutdown" at first opportunity. It sounds like Mr. Hejlsberg is suggesting that code should assume the former; perhaps that's the best possible strategy given the existing ex...
Resizing an image in an HTML5 canvas
.../**
* Hermite resize - fast image resize/resample using Hermite filter. 1 cpu version!
*
* @param {HtmlElement} canvas
* @param {int} width
* @param {int} height
* @param {boolean} resize_canvas if true, canvas will be resized. Optional.
*/
function resample_single(canvas, width, height, res...
When splitting an empty string in Python, why does split() return an empty list while split('\n') re
...es. Consider strings such as:
ps_aux_header = "USER PID %CPU %MEM VSZ"
patient_header = "name,age,height,weight"
When asked to break these strings into fields,
people tend to describe both using the same English word, "split".
When asked to read code such as fields = line.sp...
Why does direction of index matter in MongoDB?
...up a level and down the next branch. It's O(n) Out of order it's much more CPU intensive.
– Jared Kells
Apr 26 '12 at 11:53
...
How can I profile Python code line-by-line?
....com/emeryberger/scalene -- it simultaneously does line-level profiling of CPU time and memory (and more!).
– EmeryBerger
Aug 16 at 13:54
...