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Using postgresql 10 on a spinning disk.

Table layout

postgres=# \d+ t;
                                                 Table "public.t"
  Column  |  Type   | Collation | Nullable |            Default            | Storage  | Stats target | Description 
----------+---------+-----------+----------+-------------------------------+----------+--------------+-------------
 id       | integer |           | not null | nextval('t_id_seq'::regclass) | plain    |              | 

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It seems Outlook is totally bugged.

I set up a mail server and sent 4 emails in a row, for the first one Microsoft said:

dkim=pass (signature was verified)

For the second one it said:

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-- Run with:
--     ghc --make -O -threaded -fforce-recomp SlopProblem.hs && command time ./SlopProblem +RTS -N1 -s
--
-- My output with ghc 8.6.5 on a 4-core machine:
--    ...
--    336,707,456 bytes maximum residency (14 sample(s))
--    611,774,592 bytes maximum slop
--    ...
--    ... 1716344maxresident)k
-- The slop reduces to 1 MB when `-N1` is used, and the resident memory usage

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#!/usr/bin/env bash

# Installs NixOS on a Leaseweb server, wiping the server.
#
# This is for a specific server configuration; adjust where needed.
# Originally written for a Leaseweb HP DL120 G7 server.
#
# Prerequisites:
#   * Update the script to adjust SSH pubkeys, hostname, NixOS version etc.
#

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#! /usr/bin/env nix-shell
#! nix-shell -i python3 -p python3Packages.plyfile


import argparse
import sys
import numpy as np
from plyfile import PlyData, PlyElement

parser = argparse.ArgumentParser(description='''

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# This is for installing ptgui conveniently via nix
# or into NixOS.
# Build using e.g.:
#
#     nix-build -E '((import <nixpkgs> {}).callPackage (import ./ptgui-pro.nix) { })'
#
# and then run via
#
#     result/bin/PTGui
#

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Type-checking your whole Pull Request before submission

You want to make a pull request to a Haskell project, which requires that each commit in your PR compiles fine individually.

Here is an easy, automated and fast way to check it:

git rebase --interactive HEAD~~~ --exec "! grep 'error:' <(stack ghci mylibrary:lib --ghci-options='-e 1' 2>&1)"

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#! /usr/bin/env python3

import glob
import os
import subprocess
import sys
from itertools import zip_longest

# From https://stackoverflow.com/questions/434287/what-is-the-most-pythonic-way-to-iterate-over-a-list-in-chunks/434411#434411
def grouper(iterable, n):

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set -e

set -x

echo "Cat"
wget --no-clobber 'https://homepages.cae.wisc.edu/~ece533/images/cat.png'

identify 'cat.png'

echo "Cat - 100%"

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{-# LANGUAGE DefaultSignatures #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE ScopedTypeVariables #-}

module GenericsTypeName
  ( TypeName(..)
  , readBS
  ) where

import           Data.ByteString (ByteString)