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Martin Hope
code211218
Asked: 2020-07-02 00:35:20 +0000 UTC
  • 9

虽然不能保证每个单独的 GUID 都是唯一的，但唯一密钥的总数如此之大（ 2128 或3.4028 ×1038 ），世界上独立生成两个匹配密钥的可能性极小。

如何更改（修改）它以使其永远无法匹配？

guid
Martin Hope
TorSen
Asked: 2020-07-01 15:49:51 +0000 UTC
  • 9

例如，有一个包含元素的数组。

int [] numbers = new int[] { 1, 2, 3, 4, 5 };
for (int i = 0; i < numbers.Length; ++i)
{
    Console.WriteLine(numbers[i]);
}
  1. 当我打开 ILSpy 时，我发现 (++i)preincrement 变成了 postincrement(i++)，虽然看起来应该是相反的。
  2. number.Length 计算 1 次或每次迭代？？（理论上，每次，但你永远不知道环境如何以某种方式优化它）在循环之前将条件放入单独的变量中是否有意义？
c#
Martin Hope
Abyx
Asked: 2020-06-27 00:12:22 +0000 UTC
  • 9

进行一个读取bool变量的循环

#include <cstdio>

volatile bool stop = false;

void loop() {
  while (!stop) {
    putchar('.');
  }
}

我们想更改stop第 4 次读取时的值，以便循环打印省略号并结束。

如何拦截 Windows 上停止变量的读数并更改其值？

c++
Martin Hope
Samvel
Asked: 2020-06-26 03:23:37 +0000 UTC
  • 9

有一篇学期论文。课程作业的主题是“自动化注册办公系统”。好吧，你可以说我完成了工作，但由于登记处的数据非常重要，所以我决定编写一个脚本来制作dump数据库。

什么时候做才合适dump？也许每小时一次，或者每个工作日之后，或者数据库中的每次更改之后？

mysql
Martin Hope
aaa
Asked: 2020-06-22 17:40:47 +0000 UTC
  • 9

使用更新进行全新安装。启用从所有来源下载驱动程序。扬声器或耳机没有声音。不在 ubuntu 和 elementary 操作系统中。一切都包含在操作系统中，没有错误。声音设置中存在某种虚拟输出。麦克风也未定义，在相机应用程序中无法切换到第二个前端。触摸屏也有问题（例如，我无法在浏览器中滚动页面，它只是突出显示。笔记本电脑型号HP x2-10-p0005;我可以解决这个问题吗？是否有我需要的驱动程序？

在此处输入图像描述

$ lspci -vnn
00:00.0 Host bridge [0600]: Intel
Corporation Device [8086:2280] (rev 36)     Subsystem: Hewlett-Packard
Company Device [103c:827c]  Flags: bus master, fast devsel, latency 0
    Kernel driver in use: iosf_mbi_pci

00:02.0 VGA compatible controller [0300]: Intel Corporation Device
[8086:22b0] (rev 36) (prog-if 00 [VGA controller])  DeviceName: 
Onboard IGD     Subsystem: Hewlett-Packard Company Device [103c:827c]
    Flags: bus master, fast devsel, latency 0, IRQ 311  Memory at
90000000 (64-bit, non-prefetchable) [size=16M]  Memory at 80000000
(64-bit, prefetchable) [size=256M]  I/O ports at f000 [size=64]
    [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
    Capabilities: <access denied>   Kernel driver in use: i915  Kernel
modules: i915

00:03.0 Multimedia controller [0480]: Intel Corporation Device
[8086:22b8] (rev 36)    Subsystem: Hewlett-Packard Company Device
[103c:827c]     Flags: fast devsel, IRQ 255     Memory at 91000000 (32-bit,
non-prefetchable) [disabled] [size=4M]  Capabilities: <access denied>

00:0a.0 Non-VGA unclassified device [0000]: Intel Corporation Device
[8086:22d8] (rev 36)    Subsystem: Hewlett-Packard Company Device
[103c:827c]     Flags: fast devsel, IRQ 255     Memory at 9193c000 (32-bit,
non-prefetchable) [disabled] [size=4K]  Capabilities: <access denied>

00:0b.0 Signal processing controller [1180]: Intel Corporation Device
[8086:22dc] (rev 36)    Subsystem: Hewlett-Packard Company Device
[103c:827c]     Flags: fast devsel, IRQ 312     Memory at 9193b000 (64-bit,
non-prefetchable) [size=4K]     Capabilities: <access denied>   Kernel
driver in use: proc_thermal     Kernel modules: processor_thermal_device

00:14.0 USB controller [0c03]: Intel Corporation Device [8086:22b5]
(rev 36) (prog-if 30 [XHCI])    Subsystem: Hewlett-Packard Company
Device [103c:827c]  Flags: bus master, medium devsel, latency 0, IRQ
310     Memory at 91900000 (64-bit, non-prefetchable) [size=64K]
    Capabilities: <access denied>   Kernel driver in use: xhci_hcd

00:1a.0 Encryption controller [1080]: Intel Corporation Device
[8086:2298] (rev 36)    Subsystem: Hewlett-Packard Company Device
[103c:827c]     Flags: bus master, fast devsel, latency 0, IRQ 313
    Memory at 91700000 (32-bit, non-prefetchable) [size=1M]     Memory at
91600000 (32-bit, non-prefetchable) [size=1M]   Capabilities: <access
denied>     Kernel driver in use: mei_txe   Kernel modules: mei_txe

00:1c.0 PCI bridge [0604]: Intel Corporation Device [8086:22c8] (rev
36) (prog-if 00 [Normal decode])    Flags: bus master, fast devsel,
latency 0, IRQ 309  Bus: primary=00, secondary=01, subordinate=01,
sec-latency=0   Memory behind bridge: 91800000-918fffff     Capabilities:
<access denied>     Kernel driver in use: pcieport  Kernel modules:
shpchp

00:1f.0 ISA bridge [0601]: Intel Corporation Device [8086:229c] (rev
36)     Subsystem: Hewlett-Packard Company Device [103c:827c]   Flags: bus
master, medium devsel, latency 0    Capabilities: <access denied>
    Kernel driver in use: lpc_ich   Kernel modules: lpc_ich

01:00.0 Network controller [0280]: Intel Corporation Wireless 3165
[8086:3165] (rev 81)    DeviceName: Intel Stone Peak I  Subsystem: Intel
Corporation Wireless 3165 [8086:8010]   Flags: bus master, fast devsel,
latency 0, IRQ 314  Memory at 91800000 (64-bit, non-prefetchable)
[size=8K]   Capabilities: <access denied>   Kernel driver in use:
iwlwifi     Kernel modules: iwlwifi
linux
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