tef

Some notes on "Borrow checking, RC, GC, and the Eleven (!) Other Memory Safety Approaches"

https://verdagon.dev/grimoire/grimoire

I've nothing against the post, it just irks me to see a big unorganized list like a pile of christmas tree lights.

It's an interesting blog post with comprehensive references, but it's also like a travel brochure with a list of destinations. In practice you want something more like a route map: A rough overview of how different approaches complement each other, or overlap each other. A jigzaw puzzle is much easier to solve when there's a picture on the front of the box.

Here's a modest propsoal for a better table of contents:

tef

fair, fine grained, and deadlock free locking

first, a spin lock

you know what a spinlock is, right?

here's a spinlock:

tef

to be clear: histogram diff doesn't work like patience diff

By always selecting a LCS position with the lowest occurrence count, this algorithm behaves exactly like Bram Cohen's patience diff whenever there is a unique common element available between the two sequences.

This isn't true. It behaves the same when all unique tokens in the first file happen to be unique tokens in the second file. If the unique tokens in the first file aren't unique in the second file, histogram doesn't work like patience at all:

% cat a
2

tef

"""
a write-ahead-log with undo and redo

undo and redo can be implemented atop list of actions, where
each new action adds onto the list, and undo removes it from
the list, and updates the predecessor with the new redo option, 
and redo does the opposite process

say we have some history:

tef

func MakeFunc(out any) error {

  handle := func(args []any) ([]any, error) {
    // the func we're wrapping
    return args
  }

	outFn := reflect.ValueOf(out).Elem()
	outType := outFn.Type()

tef

from contextlib import contextmanager

class Node:
    def __init__(self, name, args, children):
        self.name = name
        self.args = args
        self.children = children

    def __str__(self):
        out = []

tef

Now published at https://programmingisterrible.com/post/696130032656171008/questions-i-have-been-asked-about-photography

Questions I have been asked about photography.

... and some answers I have given which may or may not help you.

What's the best way to learn photography?

Practice.

tef

Blockquotes are awful in markdown, because they're semi optional in continuation lines.

There are three options i've considered:

---

Option A: Blockquote at start of para, and on every continuation line.

> a

tef

Trip Report: Writing a CommonMark Parser

Resources

• https://spec.commonmark.org/0.29/

  CommonMark Spec 0.29

• https://github.com/tef/toyparser2019/tree/master/toyparser/commonmark

tef

Here is an indented block:

One Space, One Tab
One Tab
 One Tab, One Space.
 Five Spaces

Now prefixed with '> ', Here the's the indented block:

'> ', One Space, One Tab