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| /* | |
| * signed int addition overflow test | |
| * exit(EXIT_FAILURE) if result overflows | |
| * print the correct value if everything is good. | |
| */ | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| int add(int x, int y) { |
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| use std::io::{Read, stdin}; | |
| /* | |
| return: Some(char) on success, None on EOF or error. | |
| */ | |
| fn read_char() -> Option<char> { | |
| stdin().bytes().next().and_then(|res| res.ok()).map(|c| { | |
| char::from(c) | |
| }) | |
| } |
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| #Put it in the file '$home /. Cargo / config' | |
| [source.crates-io] | |
| registry = "https://github.com/rust-lang/crates.io-index" | |
| #Replace it with your preferred mirror source | |
| replace-with = 'sjtu' | |
| #replace-with = 'ustc' | |
| #Tsinghua University | |
| [source.tuna] |
SteveLauC
/ Delay on esc when running vim inside tmux
Created
May 12, 2022 09:05
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| # execute the following script in your terminal | |
| echo "set -sg escape-time 0" >> ~/.tmux.conf | |
| tmux source-file ~/.tmux.conf |
SteveLauC
/ chn_fonts.reg
Created
August 26, 2022 00:56
— forked from swordfeng/chn_fonts.reg
Chinese font settings in wine
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| REGEDIT4 | |
| [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\FontLink\SystemLink] | |
| "Arial"="wqy-microhei.ttc" | |
| "Arial Black"="wqy-microhei.ttc" | |
| "Arial CE,238"="wqy-microhei.ttc" | |
| "Arial CYR,204"="wqy-microhei.ttc" | |
| "Arial Greek,161"="wqy-microhei.ttc" | |
| "Arial TUR,162"="wqy-microhei.ttc" | |
| "Courier New"="wqy-microhei.ttc" |
SteveLauC
/ map-vs-and_then.rs
Last active
October 6, 2022 10:45
Stupid code snippet to tell the diff between `map` and `and_then`
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| fn map_using_if<T, U, F>(s: Option<T>, f: F) -> Option<U> | |
| where | |
| F: FnOnce(T) -> U, | |
| { | |
| if let Some(item) = s { | |
| Some(f(item)) | |
| } else { | |
| None | |
| } | |
| } |
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| fn main() { | |
| println!("Hello World!"); | |
| } |
SteveLauC
/ Test the above code.sh
Last active
December 12, 2023 06:43
A program demostrating the impact of cache line bouncing
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| $ neofetch | |
| _,met$$$$$gg. steve@debian | |
| ,g$$$$$$$$$$$$$$$P. ------------ | |
| ,g$$P" """Y$$.". OS: Debian GNU/Linux 12 (bookworm) x86_64 | |
| ,$$P' `$$$. Kernel: 6.1.0-15-amd64 | |
| ',$$P ,ggs. `$$b: Uptime: 1 day, 5 hours, 34 mins | |
| `d$$' ,$P"' . $$$ Packages: 1807 (dpkg), 22 (flatpak) | |
| $$P d$' , $$P Shell: zsh 5.9 | |
| $$: $$. - ,d$$' Resolution: 3440x1440 | |
| $$; Y$b._ _,d$P' DE: GNOME 43.9 |