Comments by "Lawrence D’Oliveiro" (@lawrencedoliveiro9104) on "Fireship" channel.

  1. I have done “clever” things. In one recent Python project, I wanted to support both synchronous and asynchronous versions of the main API classes. So I implemented a mechanism involving processing the parsed ASTs for those class definitions to generate two versions of each. That way I could write all the common code just once. The final size of the module was about 2500 lines. The code for implementing the macro-processing mechanism is about 160 lines (including comments explaining in detail how it works). If I wrote out all the expanded code by hand, it would add about 1000 lines to the code size. Less of course the macro processor, so the net gain is say 840 lines. Less code means less effort to write, and less effort to maintain, and less chance for bugs to get in. In my view, a net gain. And quite a significant one.
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  2. I wonder why a function like this isn’t built into JavaScript: function escape_html(s) { return s .replaceAll("&", "&") /* always do first, rest can be in any order */ .replaceAll("\"", """) .replaceAll("<", "<") .replaceAll(">", ">") .replaceAll("\t", " ") .replaceAll("\n", " ") } /*escape_html*/
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  3. 1:20 iostreams turned out to be a poor idea. When writing localized messages, you may need to rearrange the variable parts to cater to different language grammars: printf-style formatting has support for this, iostreams does not.
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  4. Python is dynamically typed, yet also strongly typed. To understand the difference, think about why PHP needs the “===” operator, and Python doesn’t.
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  5. Why not counting Threadrippers?
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  6. Remember that Microsoft is doing this because it has to, not out of the goodness of its heart. The only reason it has to pay attention to Python is because it is dominating the professional-quality data-analytics industry, and leaving the noddy Excel jocks in the dust. This is a way to make those Excel jocks feel they are still somehow relevant, and also pay Microsoft for the privilege.
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  7. 2:07 Unfortunately, there was this misfeature (or may be it was just an ambiguity in the original language spec) whereby a loop would always iterate at least once, even if the termination condition was true at the start. Not sure if this was ever fixed.
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  8. Notice I didn’t say anything about “do-while”.
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  9.  @chri-k  Guess which one I was talking about. Consider the equivalent of for i in range(len(s)) : ... do something with s[i] ... ♯end for where s might be empty in some situations.
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  10.  @chri-k  CONTINUE was a no-op. Other languages didn’t have this problem.
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  11.  @chri-k  I noticed.
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  12. I actually wrote some code many years ago to do Marquadt-Levenburg curve fits.
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  13. Least-squares is the most common way to optimize a curve fit.
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  14. Is the Universe too complex to have arisen by itself?
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  15. If the Universe is too complex to have arisen by itself, then there must have been some precursor agency that created it. But wouldn’t this Creator agency have been even more complex than the Universe?
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  16. But if the Universe is too complex to have arisen by itself, how could something even more complex have arisen by itself?
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  17.  @vincentgoudreault9662  Other languages (like C or Python, even old Pascal) don’t need a keyword to distinguish the two. Why FORTRAN?
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  18.  @vincentgoudreault9662  Try giving the same name to an array and a subroutine in FORTRAN, and let us know what happens.
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  19.  @WielkiKaleson  So how does that explain the need for CALL?
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  20.  @WielkiKaleson  Maybe read the comments before replying next time.
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  21.  @andresmartinezramos7513  Which doesn’t answer the question I asked, which is why subroutine calls need the word “CALL” in FORTRAN, but not in other languages.
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  22. It was so that FORTRAN didn’t have any reserved words.
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  23. It's integrated in lots of open-source apps, like Blender, Inkscape, GIMP ... basically, it’s become very popular glue for content-creation industries, among others.
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  24.  @fred.flintstone4099  If it can be integrated into GPL’d software, it can be integrated into anything (open-source).
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  25. I must remember that. The next time I need to do such a thing, I need to resist the temptation to do it with “grep -v” (which can operate on arbitrary-sized files) and use vim instead.
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  26. All the caffeine, I suppose ...
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  27. 0:40 Every time I see repetitive code, I think “why don’t you refactor that into another function?”.
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  28. I don’t use Anaconda. Is that a Windows thing?
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  29. Trouble is, he said that before the rise of very-high-level languages like Perl and Python. Also he probably never used LISP.
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  30. Think of this as Python+Jupyter+Pandas+etc embracing and extending Excel. Guess what happens next ...
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  31. Hint: everything that Excel does can be done much more nicely by those other tools.
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  32. I assume that, in Ruby, function/method definitions and class definitions are declarative, as they are in conventional languages. Remember in Python, these are just special forms of assignment statement, and the function names and class names are just variables that are assigned those objects. (Yes, functions and classes are objects.)
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  33. Winget has been in development way too long. Last I checked, it was little more than a wrapper around your existing software installers, and didn’t even handle library packages. What’s the bet Microsoft will lose interest and give up, as it has so many times before?
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  34. You can encrypt arbitrary long messages with any decent encryption algorithm using any key.
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  35.  @vishalmishra3046  Consider that there is no limit on the length of a TLS certificate.
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  36. 0:28 While “International Earth Rotation Service” remains a cool name, I don’t think they officially use that any more.
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  37.  @notbobbobby  The fact that you can customize Emacs with just a few lines of code, rather than having to download and install a whole “plugin”, makes the barrier to entry quite low.
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  38. For example, setting up a custom character table for Python identifiers, which can include any Unicode characters that are classed as “letters”: (defvar identchars (make-char-table nil)) (map-char-table (lambda (key value) ; include all uppercase and lowercase letters (when (or (eq value 'Lu) (eq value 'Ll)) (set-char-table-range identchars key t) ) ; when ) ; lambda unicode-category-table ) (set-char-table-range identchars '(?0 . ?9) t) (set-char-table-range identchars ?_ t)
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  39. I have experimented with using melt. This lets you create an XML control file that defines all the edits. It uses FFmpeg underneath anyway.
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  40.  @pabloripoll  Do PHP programmers use references in any “real project scenario”, then?
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  41.  @sudeshryan8707  Hint: try the code and see what it actually prints.
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  42. Here’s an example of commented code that I write: my_wait_avail = asyncio.get_running_loop().create_future() if self.wait_avail != None : # somebody else using this socket -- wait till they’re done await self.wait_avail ♯end if assert self.wait_avail == None self.wait_avail = my_wait_avail # claim ownership of socket Now, would you suggest getting rid of those comments, or not?
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  43.  @hamm8934  Show us how you would do it, then.
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  44. Arduino can do microsecond-level response times, Raspberry π cannot. That’s the difference between a full computer running a full OS, and a bare-bones one running just the code you compile for it and nothing more. Each has their uses.
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  45. @VoidField101x The π Pico, with its programmable I/O channels, is purpose-built for that. There is a demonstration somewhere of it doing real-time emulation of the video interface on the old BBC Micro.
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  46. He can see us, even though we can’t see him ...
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  47. Why don’t you write one?
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  48. 0:46 In the immortal words of June Whitfield: “Just the one, dear?”
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  49. Even with higher taxes, socialist-style (i.e. Government-provided) healthcare still only has about half the cost per capita of US-style medical insurance.
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  50. Except he’s talking about Anzible instead of Ansible.
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