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Zhumatiy Sergey zhum

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zhum / gist:2754875d37ec9c343b5ebf45a54cbfbe
Created September 23, 2026 23:39
Bash arguments parser
# shellcheck shell=bash
# shellcheck disable=SC2004,SC2034 # [$i] indices are fine; ARGS_REST is read by the caller
#
# args.sh — declarative long/short option parser for bash >= 3.2
#
# Source this file, declare options, parse, then use the variables:
#
# . "$(dirname "$0")/args.sh"
#
# args_init "mytool" "Short description of the tool."
@zhum
zhum / lua-cheat-sheet.md
Last active December 31, 2025 21:54
Lua Cheat Sheet
@zhum
zhum / gist:27c3bb204f96c6787d054fbf1722eb24
Created September 10, 2025 22:22
Simple python tricks
# List to dict
a = [10, 20, 30]
b = {index: value for index, value in enumerate(a)}
# {0: 10, 1: 20, 2: 30}
a = ["a", 1, "b", 2, "c", 3]
b = {a[i]: a[i + 1] for i in range(0, len(a), 2)}
# {"a": 1, "b": 2, "c": 3}
@zhum
zhum / nvidia-smi-q.txt
Last active September 1, 2026 18:15
nvidia-smi cheatsheet
nvidia-smi --query-gpu=OPTION,... [--format=csv[,hoheader]]
timestamp - YYYY/MM/DD HH:MM:SS.msec
driver_version
count
name or gpu_name
serial or gpu_serial
uuid or gpu_uuid
pci.bus_id or gpu_bus_id - domain:bus:device.function, in hex
pci.domain
@zhum
zhum / python-task-pool.py
Created December 2, 2022 13:47
Wrapper to execute one function with different arguments in parallel, using execution pools
import concurrent.futures
import functools
import queue
import subprocess
import random
def pool_wrapper(q_in, q_out, size=5):
def pool_wrapper_inner(func):
@zhum
zhum / bash-lib.sh
Last active September 23, 2026 22:08
A library of usefull BASH 4+ functions (many won't work in sh)
# Please, check https://github.com/dylanaraps/pure-bash-bible
# It is a great chest of treasures
#
# Functions list:
#
# Strings:
# constainsElement - check if element is in the array
# trim_string - trim spaces from string head and tail
# trim_all - trim ALL spaces
# trim_quotes - trim quotes from string
@zhum
zhum / awk-replaces.sh
Created July 31, 2022 09:20
awk replacement sample
#!/bin/sh
# replace "Nodename=abc Uptime=1 CPUs=128 State=Drain Reason=no cpu detected [12:00]" -> "abc: no cpu detected"
gawk '{print gensub(/NodeName=([[:alnum:]]+).*Reason=([^[]+)\[.*/, "\\1: \\2", "g") }'
@zhum
zhum / kube-error-upgrade-connection
Last active April 29, 2022 12:33
kube-error-upgrade-connection
Cannot connect to any pod - get "Unable to upgrade connection".
Log:
Apr 2 03:42:59 graphit kubelet[18632]: E0402 03:42:59.173155 18632 server.go:253] Unable to authenticate the request due to an error: x509: certificate has expired or is not yet valid
Meanwhile:
CERTIFICATE EXPIRES RESIDUAL TIME CERTIFICATE AUTHORITY EXTERNALLY MANAGED
admin.conf Apr 02, 2023 00:29 UTC 364d no
apiserver Apr 02, 2023 00:29 UTC 364d ca no
@zhum
zhum / scheduler_for_buckets.rb
Created March 30, 2022 21:52
scheduler_for_buckets
# // # // Implement a function that orders inputs to schedule for min TAT (Turn around time == Total Run Time)
# // # // Input: (list of runtimes, number of parallel buckets)
# // # // Output: Should parallelize individual tasks such that total TAT is minimum.
# // # // Example:
# // # // In: [4, 3, 100, 2, 1], parallel = 2
# // # // Out: [[100], [4, 3, 2, 1]], TAT: 100
# // # // [100, 10] -> 100
# // # // In: [4, 3, 100, 2, 1], parallel = 1
# // # // Out: [[100, 4, 3, 2, 1]], TAT: 110
# // # //
@zhum
zhum / memoization.rb
Created January 28, 2022 08:49 — forked from cqfd/memoization.rb
Ruby memoization exercise
require 'minitest/autorun'
module Memoization
def memoize(f, injected_cache={})
m = instance_method(f)
define_method(f) do |*args|
cache = injected_cache.clone
define_singleton_method(f) do |*args|
unless cache[args]
puts "Actually calculating..."