elliotwutingfeng

function argMin(arr) {
    if (!arr.length) {
        throw new Error('Array cannot be empty');
    }
    return arr.reduce(
        (best_idx, curr, curr_idx, array) =>
        curr < array[best_idx] ? curr_idx : best_idx,
        0
    )
}

elliotwutingfeng

import ipaddress
import json
from collections import defaultdict
from itertools import chain
from urllib.request import urlopen

with urlopen("https://ip-ranges.amazonaws.com/ip-ranges.json") as req:
    resp_json = json.loads(req.read())
ip_prefixes_and_regions = (
    (x["ip_prefix"], x["region"])

elliotwutingfeng

#!/bin/sh
# -a : archive mode
# -v : verbose
# -z : compress file data during the transfer
# -h : output numbers in a human-readable format
# -P : show progress during transfer and keep partially transferred files to make a subsequent transfer of the rest of the file much faster
# -e : Specify protocol to use; in our case it is ssh
rsync -avzhPe ssh <remote_username>@<remote_hostname>:/path/to/file ./

elliotwutingfeng

#!/bin/sh
# https://stackoverflow.com/a/69081814/13253866
# Generates requirements.txt for project in current working directory
pip3 install pipreqs
pip3 install pip-tools
pipreqs --savepath=requirements.in && pip-compile && rm requirements.in

elliotwutingfeng

How to Run a Process in the Background with TMUX

There are times when you need to log off your Linux Desktop, and you want a process to run in the background. TMUX manages this very well.

For this example, let's suppose you're running a long running task like running rspecs on your project and it is 5pm, and you need to go home.

Run Your Process

elliotwutingfeng

Preventing SSH tmux sessions from getting automatically killed

On client

Set the following in /etc/ssh/ssh_config

Host *
    ServerAliveInterval 300
    ServerAliveCountMax 3

On server

Set the following in /etc/ssh/sshd_config

elliotwutingfeng

# ----------------------------------------------
# Zelo*s "Big" Blocklist - for a better internet
# ----------------------------------------------
#
# Title: Zelo72 - Big
#
# An all in one blocklist that can be used as a
# stand alone blocklist. For every region.
#
# Blocks:

elliotwutingfeng

"""
Requires libcurl (https://curl.se/libcurl)
"""
import time
import pycurl # pip3 install pycurl

def backoff_delay(backoff_factor: float,number_of_retries_made: int) -> None:
    """Time delay that exponentially increases with `number_of_retries_made`

    Args:

elliotwutingfeng

char ____ZN7Backend6Google12SSBUtilities24shouldConsultWithTencentEv_block_invoke_2(void * _block) {
    rax = [NSLocale currentLocale];
    rax = [rax retain];
    r14 = [[rax countryCode] retain];
    [rax release];
    rbx = [r14 isEqualToString:@"CN"] != 0x0 ? 0x1 : 0x0;
    [r14 release];
    rax = rbx;
    return rax;
}

elliotwutingfeng

Setting up multi-node ray

Head node

systemd-run --scope --user tmux # or `tmux`
sudo ufw allow in 6379
sudo ufw allow out 6379
sudo ufw allow in 37347
sudo ufw allow out 37347
sudo ufw allow in 37348