memorycancel

{
    "cmd": ["/home/memorycancel/.local/share/mise/installs/ruby/3.4.2/bin/ruby", "\"$file\""],
    "file_regex": "^[ ]*File \"(...)\", line ([0-9:]*)$",
    "selector": "source.ruby",
    "shell_cmd": "/home/memorycancel/.local/share/mise/installs/ruby/3.4.2/bin/ruby \"$file\"",
    "shell": true
}

memorycancel

sudo apt-get update
sudo apt-get install libjemalloc-dev
RUBY_CONFIGURE_OPTS='--with-jemalloc' rbenv install 2.6.3

# test (look for jemalloc warnings)
MALLOC_CONF=invalid_flag:foo ruby -v

memorycancel

sudo apt-get -y install fcitx im-config
im-config ## choose fcitx

sudo apt-get -y install fcitx-googlepinyin

## choose fcitx keyboard icon, choose "Text Entry Setting"
## in the opned windows, click "+" icon
## search "pinyin" and Google Pinin" will come out

## if cannot not be used immediately, log out once

memorycancel

# before https://mise.jdx.dev/lang/ruby.html

sudo apt-get install build-essential libz-dev libssl-dev libffi-dev libyaml-dev
mise use -g ruby@3.3

memorycancel

puts "Hello, World!"

memorycancel

#include <iostream>
int main()
{
    std::cout<<"Hello, World!";
    return 0;
}

memorycancel

#![allow(unused_variables)]
#![allow(unused_imports)]

use std::env;
use std::process;
use std::thread;
use std::io::{self, Read, Write, Error};
use std::net::TcpStream;
use std::net::TcpListener;