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...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。
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num = 1024
num = 3.0
num = 3.1416
num = 314.16e-2
num = 0.31416E1
num = ...
Remote debugging with Android emulator
...? I'm sick and tired of the emulator constantly eating half of my laptop's CPU.
8 Answers
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What platforms have something other than 8-bit char?
....
For instance, most early-90s developers assumed that a particular no-op CPU timing delay taking a fixed number of cycles would take a fixed amount of clock time, because most consumer CPUs were roughly equivalent in power. Unfortunately, computers got faster very quickly. This spawned the rise of...
Is the sizeof(some pointer) always equal to four?
... @SangeethSaravanaraj: Note that theoretically the native word size of the CPU and what the compiler decides 'int' is can be arbitrarily different, it's just it was convention for 'int' to be the native word size before x86-64 came around, where it's long to ease backwards compat.
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Increasing the maximum number of TCP/IP connections in Linux
...ique allows me to use large data packets, reduce fragmentation, reduces my CPU utilization both in the user land and at kernel-level.
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How to simulate Android killing my process
...if it is in the background and the OS decides it needs the resources (RAM, CPU, etc.). I need to be able to simulate this behaviour during testing so that I can ensure that my application is behaving correctly. I want to be able to do this in an automated way so that I can test if the application be...
Node.js or Erlang
...ngle-threaded environment. So it's great at dispatching but not so good at CPU-intensive processing. To cover that ground you can fork off another process/thread that runs native C/C++ code. If all you're doing is async IO calls (ex IPC | bi-directional pipes) then node.js should be able to handle t...
Download a file by jQuery.Ajax
...ry at least as large as the file being downloaded and/or other interesting CPU side effects.
fetch('https://jsonplaceholder.typicode.com/todos/1')
.then(resp => resp.blob())
.then(blob => {
const url = window.URL.createObjectURL(blob);
const a = document.createElement('a'...
How to turn on front flash light programmatically in Android?
... for flashlight. It is possible that you can reduce power consumption and CPU load with camera2, though, as you don't need to keep an active preview to enable flashlight.
– Eddy Talvala
Jan 22 '15 at 5:32
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Performance of Arrays vs. Lists
...e.
The bounds checking is often no big deal (especially if you are on a cpu with a deep pipeline and branch prediction - the norm for most these days) but only your own profiling can tell you if that is an issue.
If you are in parts of your code where you are avoiding heap allocations (good exam...