unclechu

#! /usr/bin/env nix-shell
#! nix-shell --pure -i runhaskell
#! nix-shell -E "with import (fetchTarball{url=\"https://github.com/NixOS/nixpkgs/archive/d887ac7aee92e8fc54dde9060d60d927afae9d69.tar.gz\";sha256=\"1bpgfv45b1yvrgpwdgc4fm4a6sav198yd41bsrvlmm3jn2wi6qx5\";}) {}; let hs=haskellPackages.ghcWithPackages(p:[p.postgresql-simple p.async p.turtle p.text p.process p.time]); in mkShell{buildInputs=[postgresql hs cacert];}"

{-
Haskell script that reproduces race condition in PostgreSQL database.
This is not considered a bug but rather an expected behavior,
just something you should be aware of.

This test demonstrates that if you have two transactions and data reads in both

unclechu

# How to use/test:
#   nix-build neovim.nix -o neovim
#   neovim/bin/nvim

let
  nixpkgs-unstable-pin = fetchTarball {
    url = "https://releases.nixos.org/nixos/unstable/nixos-21.11pre308897.e41ba381140/nixexprs.tar.xz";
    sha256 = "1smkm0z569lp321m7jsyy1fvnvl2nc8vh2nak946r9fd4hl4px4p";
  };
in

unclechu

#! /usr/bin/env nix-shell
#! nix-shell --pure -i runhaskell -E "import ./shell.nix {}"

{-
  This is a demonstration of the fix of the issue
  https://github.com/haskell-servant/servant/issues/1346

  Run server (make sure there’s “shell.nix” in the same directory):
    ./issue-fix-demo.hs

unclechu

#! /usr/bin/env nix-shell
#! nix-shell --pure -i runhaskell -E "import ./shell.nix {}"

{-
  This a demonstration of the issue with Servant library.
  ReqBody' '[Optional] doesn’t make the value be optional,
  the value of ReqBody isn’t wrapped into Maybe as it supposed to.

  Run server (make sure there’s “shell.nix” in the same directory):
    ./issue-demo.hs

unclechu

#! /usr/bin/env nix-shell
#! nix-shell -i runhaskell -E
#! nix-shell "let ghc=n.haskellPackages.ghcWithPackages(p:[p.hspec]); n=import(fetchTarball{url=\"https://github.com/NixOS/nixpkgs/archive/db31e48c5c8d99dcaf4e5883a96181f6ac4ad6f6.tar.gz\";sha256=\"1j5j7vbnq2i5zyl8498xrf490jca488iw6hylna3lfwji6rlcaqr\";}){}; in n.mkShell{buildInputs=[ghc];}"

-- Reimplementation of Haskell’s "Data.Foldable.Foldable" from "Prelude" in order to fix partial
-- functions.
--
-- Author: Viacheslav Lotsmanov, 2020
--
-- Still WIP, planning to make a library as soon as it implements all the required stuff.

unclechu

<style>
table th, table td {
	border: 1px solid black;
}
</style>

<table dir="auto">
<tr>
<th><b>8.10.1</b></th>
<th><b>8.8.3</b></th>

unclechu

#! /usr/bin/env nix-shell
#! nix-shell --pure -i runhaskell
#! nix-shell -E "with import (fetchTarball { url = \"https://github.com/NixOS/nixpkgs/archive/db31e48c5c8d99dcaf4e5883a96181f6ac4ad6f6.tar.gz\"; sha256 = \"1j5j7vbnq2i5zyl8498xrf490jca488iw6hylna3lfwji6rlcaqr\"; }) {}; mkShell { buildInputs = [(haskellPackages.ghcWithPackages (p: [p.servant p.servant-server]))]; }"
{-# LANGUAGE UnicodeSyntax #-}

import Servant

main ∷ IO ()
main = putStrLn "foo"

unclechu

#! /usr/bin/env raku
use v6.d;
# Author: Viacheslav Lotsmanov, 2020

constant report-note = q«Working on some project»;

sub report-day(Str \date, Rat \hours) {
	my Str @cmd = './report', "--date={date}", 'hours', hours.fmt(q/%0.1f/), report-note;
	my Str @logcmd = @cmd.map({ .match(/\s/) ?? "'$_'" !! $_ });
	"[{@cmd.elems}] {@logcmd.join: ' '}".note;

unclechu

{
  nixpkgs ? import <nixpkgs> {},
  name,
  tag,
}:

let
  inherit (nixpkgs) pkgs;
  inherit (pkgs) dockerTools;
in

unclechu

/*!
 * Date: December 2019
 * Author: Viacheslav Lotsmanov
 * License: Public Domain
 *
 * Special thanks to Gerrit Birkeland @gitter_gerrit0:matrix.org
 * from https://riot.im/app/#/room/#typescript:matrix.org
 * for good working examples and explanation!
 *
 * This module provides "deNull" which tries to