Hacker News Reader

Relevant:

Vite: The Documentary https://www.youtube.com/watch?v=bmWQqAKLgT4

vannion Mozilla's new Firefox Linux package for Ubuntu and Debian derivatives

It's documented: https://support.mozilla.org/en-US/kb/install-firefox-linux#w...

vannion Largest island in a lake on an island in a lake on an island (2007)

https://www.britannica.com/story/is-australia-an-island

vannion Ask HN: Do you read articles on HN before reading/writing comments?

https://addons.mozilla.org/en-US/android/addon/ublock-origin...

vannion Svelte took #1 spot in State of JavaScript 2020 survey

My main concerns as a "technology buyer" are (from what I found online with a rapid search): lack of funding, currently only two main committers (the original author not among them), project apparently in bugfixing-only mode, and the original author online attitude.

vannion Svelte took #1 spot in State of JavaScript 2020 survey

Some food for thought (found during a quick evaluation of Svelte for future projects)

Contributors

https://github.com/sveltejs/svelte/graphs/contributors

See main three graphs.

Roadmap

https://github.com/sveltejs/svelte/issues/622

> (last comment - Jun 28, 2020) This isn't really an up to date of view on where we are and where we would like to go. We have some tentative plans to improve how we communicate the 'roadmap' in the future. We'll update when we know more.

https://github.com/sveltejs/svelte/issues/3704

> Honestly the roadmap for the near future is the same as it's been since Svelte suddenly got much more popular without a corresponding increase in maintainer resources: fixing bugs. Developing exciting new features is going to take a back seat to dealing with the huge backlog of issues for the time being.

From original Svelte author:

https://twitter.com/Rich_Harris/status/1341076126475710465

> [...] if you do this on a github repo i'm involved with because you're dissatisfied with the help that was given freely and patiently by other contributors, i will make a mental note of who you are so i can ensure you never get my help, ever

https://twitter.com/Rich_Harris/status/1341167074018795526

> [...] believe it or not I don't spend my time waiting around to be summoned by people expecting me to do free work for them

vannion Ditherpunk: The article I wish I had about monochrome image dithering

Probably dynamic contrast ratio by graphic driver and/or monitor that is tricked/triggered by unusual dithered patterns during scrolling.

vannion Olbers' Paradox

Right. Sabine Hossenfelder about it: https://www.youtube.com/watch?v=ZYM6HMLgIKA&t=395s

vannion Ask HN: Losing all interest in programming, what now?

Relevant: https://twitter.com/danoot/status/1334967635318956034

vannion Parse, don’t type-check

OK, mystery solved. In Python:

  1 in [1,2,3] is True

is evaluated as

  (1 in [1, 2, 3]) and ([1, 2, 3] is True)

similarly to

  1 < 2 < 3

:facepalm:

vannion Parse, don’t type-check

The disassembly in parent comment is made with CPython 3.6.9, but nothing substantial changes on CPython 3.8.x/3.9.x or PyPy.

Maybe it is related to grammar, and not to compiler...

AST dump in CPython 3.6.9 (manually formatted):

  In [1]: import ast
  
  In [2]: print(ast.dump(ast.parse("""\
     ...: def a():
     ...:     return (1 in [1,2,3] is True)""")))
  
  Module(
      body=[
          FunctionDef(
              name='a',
              args=arguments(args=[], vararg=None, kwonlyargs=[], kw_defaults=[], kwarg=None, defaults=[]),
              body=[
                  Return(
                      value=Compare(
                          left=Num(n=1),
                          ops=[In(), Is()],
                          comparators=[
                              List(elts=[Num(n=1), Num(n=2), Num(n=3)], ctx=Load()),
                              NameConstant(value=True)
                          ]
                      )
                  )
              ],
              decorator_list=[],
              returns=None
          )
      ]
  )
  
  In [3]: print(ast.dump(ast.parse("""\
     ...: def b():
     ...:     return ((1 in [1,2,3]) is True)""")))
  
  Module(
      body=[
          FunctionDef(
              name='b',
              args=arguments(args=[], vararg=None, kwonlyargs=[], kw_defaults=[], kwarg=None, defaults=[]),
              body=[
                  Return(
                      value=Compare(
                          left=Compare(
                              left=Num(n=1),
                              ops=[In()],
                              comparators=[List(elts=[Num(n=1), Num(n=2), Num(n=3)], ctx=Load())]
                          ),
                          ops=[Is()],
                          comparators=[NameConstant(value=True)]
                      )
                  )
              ],
              decorator_list=[],
              returns=None
          )
      ]
  )

vannion Parse, don’t type-check

It's not a matter of operator precedence for two reasons:

1) "in" and "is" have same precedence, and group left to right (see https://docs.python.org/3/reference/expressions.html#operato...)

2) you'll have runtime error:

  In [1]: def c():
     ...:     return (1 in ([1,2,3] is True))
  
  In [2]: c()
  ...  
  TypeError: argument of type 'bool' is not iterable

It seems related to CPython bytecode compiler implementation, the two functions are parsed in a different way, parentheses make the compiler go on a different path... but I'd like to understand why, without diving into CPython source code :) Anyone?

vannion Parse, don’t type-check

"pretty unintuitive" is an understatement...

  In [1]: import dis
  
  In [2]: def a():
     ...:     return (1 in [1,2,3] is True)
  
  In [3]: def b():
      ..:     return ((1 in [1,2,3]) is True)
  
  In [4]: a()
  Out[4]: False
  
  In [5]: b()
  Out[5]: True
  
  In [6]: dis.dis(a)
    2           0 LOAD_CONST               1 (1)
                2 LOAD_CONST               1 (1)
                4 LOAD_CONST               2 (2)
                6 LOAD_CONST               3 (3)
                8 BUILD_LIST               3
               10 DUP_TOP
               12 ROT_THREE
               14 COMPARE_OP               6 (in)
               16 JUMP_IF_FALSE_OR_POP    24
               18 LOAD_CONST               4 (True)
               20 COMPARE_OP               8 (is)
               22 RETURN_VALUE
          >>   24 ROT_TWO
               26 POP_TOP
               28 RETURN_VALUE
  
  In [7]: dis.dis(b)
    2           0 LOAD_CONST               1 (1)
                2 LOAD_CONST               5 ((1, 2, 3))
                4 COMPARE_OP               6 (in)
                6 LOAD_CONST               4 (True)
                8 COMPARE_OP               8 (is)
               10 RETURN_VALUE

Why?!

vannion Oblique Strategies

Somewhat relevant:

https://intuiti.it/

A tool for Creativity born in the Polytechnic University of Milan. A synthesis of Design, Tarot and Gestalt Psychology.

vannion Building GUIs with DearPyGui

From the "Integration with Other Frameworks" section of the article [1]:

> DearPyGui can actually be used in conjuction with other GUI frameworks. For example, with tkinter:

> This just requires replacing start_dearpygui with setup_dearpygui, render_dearpygui_frame, and cleanup_dearpygui in order to expose the event loop.

[1] https://itnext.io/python-guis-with-dearpygui-137f4a3360f2#2a...

vannion 0.30000000000000004

This is called fixed-point arithmetic:

https://en.wikipedia.org/wiki/Fixed-point_arithmetic

> In computing, a fixed-point number representation is a real data type for a number that has a fixed number of digits after (and sometimes also before) the radix point.

> A value of a fixed-point data type is essentially an integer that is scaled by an implicit specific factor determined by the type.

vannion Ask HN: What's the most valuable thing you can learn in an hour?

How to Solve a Rubik's Cube:

https://www.wired.com/story/how-to-solve-a-rubiks-cube-step-...

vannion Ask HN: Successful one-person online businesses?

Ask HN: One-person SaaS apps that are profitable? https://news.ycombinator.com/item?id=19701783 752 points - 6 months ago

vannion Really Fixing Getrandom()

Somewhat relevant: CPU Time Jitter Based Non-Physical True Random Number Generator by Stephan Müller

http://www.chronox.de/jent/doc/CPU-Jitter-NPTRNG.html#toc-Ap...

https://pdfs.semanticscholar.org/af73/17c970fd416646b2e46659...

vannion [dead]

> Only six months after we had launched Stack Overflow, my co-founder Jeff Atwood and I were invited to speak at a Microsoft conference for developers in Las Vegas. We were there, I think, to demonstrate that you could use their latest ASP.NET MVC technology on a real website without too much of a disaster. (In fact .NET has been a huge, unmitigated success for us, but you kids go ahead and have fun with whatever platform you want mkay? They’re all great, or, at least, above-average).

A bit too much condescending?

vannion A random dungeon generator that fits on a business card

dog https://twitter.com/munificentbob/status/1101903466111283200

vannion Domain hacks with unusual Unicode characters

An IP is just an unsigned 32 bit integer:

3520653040 = 209 * 256^3 + 216 * 256^2 + 230 * 256^1 + 240 * 256^0

The 209.216.230.240 representation is the sequence of octets (256 = 2^8) from MSB to LSB expressed as decimal values.

vannion Slack outage: Connectivity issues affecting all workspaces

Slack and Chromecast having an almost simultaneous worlwide outage... have they something in common? Same enemies?

https://twitter.com/search?f=tweets&q=chromecast%20slack

https://techcrunch.com/2018/06/27/google-home-and-chromecast...

vannion What Astronomers Are Learning from Gaia’s New Milky Way Map