mkatychev

use std::{future::Future, time::Duration};

use bigerror::{LogError, NetworkError, OptionReport, Report, ReportAs, ResultExt};
use futures::{future, pin_mut};
use stream_cancel::TakeUntilIf;
use tokio::{
    sync::mpsc::{UnboundedSender, WeakUnboundedSender},
    task::JoinHandle,
};
use tokio_stream::wrappers::UnboundedReceiverStream;

mkatychev

#!/usr/bin/env bash

join_files() {
  local input_n=()
  local scale_to_n=("$SEP")
  local concat_n=()
  for i in $(seq $#); do
    input_n+=("-i ${!i}")
    ((n = i - 1))

mkatychev

Quickref

Variable	Description	Example
CI	Always set to true
GITHUB_ACTION	The name of the action currently running
GITHUB_ACTION_PATH	The path where an action is located, only supported in composite actions.	/home/runner/work/_actions/repo-owner/name-of-action-repo/v1
GITHUB_ACTION_REPOSITORY	The owner and repository name of the action.	actions/checkout
GITHUB_ACTIONS	Always set to true when GitHub Actions is running the workflow.
GITHUB_ACTOR	The name of the person or app that initiated the workflow.	octocat

mkatychev

{
  "$comment": "https://help.github.com/en/github/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "additionalProperties": false,
  "definitions": {
    "architecture": {
      "type": "string",
      "enum": [
        "ARM32",
        "x64",

mkatychev

How to Change Open Files Limit on OS X and macOS

This text is the section about OS X Yosemite (which also works for macOS Sierra) from https://docs.basho.com/riak/kv/2.1.4/using/performance/open-files-limit/#mac-os-x

The last time i visited this link it was dead (403), so I cloned it here from the latest snapshot in Archive.org's Wayback Machine https://web.archive.org/web/20170523131633/https://docs.basho.com/riak/kv/2.1.4/using/performance/open-files-limit/

Mac OS X

To check the current limits on your Mac OS X system, run:

mkatychev

State Storage using Zipper

The Data structure used to store various states uses a cursor to traverse the nodes known as the Zipper technique.

Example of a Zipper cursor traversing a Vector, the focus provides a view "Up" and "Down" the data:

[1, 2, 3, 4, 5] // array with 5 entries
 1}[2, 3, 4, 5] // zipper starts with focues at first index

mkatychev

#[macro_export]
macro_rules! from_report {
    (impl From<$from:path as $context:path> for $for:ident::$variant:ident) => {
        impl From<$from> for $for {
            fn from(e: $from) -> Self {
                Self::$variant(error_stack::Report::new(e).change_context($context))
            }
        }
    };
    (impl From<$from:path> for $for:ident::$variant:ident) => {

mkatychev

Figure 1

%%{init: {
    "fontFamily": "Times New Roman",
    'logLevel': 'debug',
    'sequence': { 
        'noteFont': 100,
        'noteMargin': 100,
 'messageFont': 100,

mkatychev

use std::mem::transmute;
fn main() {
    let num: u32 = u32::MAX;
    println!("u32: {num}");
    println!("u16: {}", num as u16);
    println!("i32: {}", num as i32);
    println!("f32: {}", num as f32);
    let bytes_u32: [u8; 4] = unsafe { transmute(num.to_be()) };
    let bytes_u16: [u8; 2] = unsafe { transmute((num as u16).to_be()) };
    let bytes_i32: [u8; 4] = unsafe { transmute((num as i32).to_be()) };

mkatychev

# golang manual
tldr go
# vscode
tldr code
# open vscode in current terminal directory
code .
# winget
tldr winget
# winget website:
echo "https://winget.run/"