jepler

26 ms·

241.
by jepler 6y ago
The ability of an ordering function that is not a Strict Weak Ordering to cause runtime segfaults when used with sort or an ordered container is .. one of the top vexing things in C++. I think that we naively expect that such a sort predic
242.
by jepler 6y ago
"The commercial applicability of polyethylene is limited by its low melting point compared to other thermoplastics…The melting point for average, commercial, low-density polyethylene is typically 105 to 115 °C (221 to 239 °F)." --
243.
by jepler 6y ago
Any change in the 20ish months since that article was published?
244.
by jepler 6y ago
https://en.wikipedia.org/wiki/Sponge#Skeleton https://en.wikipedia.org/wiki/Echinoderm#Skin_and_skeleton
245.
by jepler 6y ago
It's mostly been fine -- ublock origin is available, pages load/view fine (except I couldn't log in to ebay; could be ublock). what's really been bugging me is that viewing PDFs seems to have gotten much worse. I don&#
246.
by jepler 6y ago
What are the "levels" of hash functions?
247.
by jepler 6y ago
> The misa CSR is a WARL read-write register reporting the ISA supported by the hart [hart is a hardware thread] - from the Privileged Architecture manual However, I didn't see how a nonstandard extension such as this would be repre
248.
by jepler 6y ago
Did you find more info on rvzs? The progress report makes it sound like rvz compresses random data, but that's plainly not true. I'd love to understand what "garbage data" actually is. It must actually have lots of pa
249.
by jepler 6y ago
Check my math: Say a fueling station needs to serve (only) 100 cars per day, providing 50kWh per car. That's 200kW average generation power needed. Ballpark, a 1 m2 solar panel can generate 200kWh/year, or 23W average. (quora ans
250.
by jepler 6y ago
A consequence of this is the so-called "undocumented" opcodes of the 6502. Extra instructions such as LAX (load A and X from the same value) "work" because the instruction activates two different blobs of logic (the one
251.
by jepler 6y ago
https://en.wikipedia.org/wiki/Mathematics_of_Sudoku#Enumerat... I believe these ways of relabeling you mention are all taken into account when numbering the "essentially different" puzzle configurations.
252.
by jepler 6y ago
def f() -> bool: """return True iff the Collatz Conjecture is true""" def g() -> bool: """return False iff OpenAI correctly completes this code"""
253.
by jepler 6y ago
These are great little boards, and they already have support in the latest beta of CircuitPython! https://circuitpython.org
254.
by jepler 6y ago
Specifically, when I got to IV.ii Lexing of punctuators, which proposes to fix, say, the ambiguity of "*" as an infix or prefix operator by introducing the unicode symbol × for the binary operator, and so on. Even better, to get
255.
by jepler 6y ago
is this not an april fool?
256.
by jepler 6y ago
https://godbolt.org/z/z-92qR Interestingly, the compiler emits no call to malloc, even. What!?
257.
by jepler 6y ago
Funny you should ask. I am having a lot of frustrations with it. We are seeing jobs that hang, lingering seemingly forever. I canceled one today that was 7 days old. They have un-openable logs for some buld step that should take <10 m
258.
by jepler 7y ago
Not "between" in the sense of having an intermediate cardinality between rationals and reals, since they are exactly the numbers available from strings in some symbolic system or other. Seems to be a slightly expanded case of alg
259.
Adafruit Industries, Essential service and business (Covid-19)(blog.adafruit.com)
2 points by jepler 7y ago|0 comments
260.
Open Hardware Summit Is Going Virtual(2020.oshwa.org)
3 points by jepler 7y ago|0 comments
261.
by jepler 7y ago
Incidentally, while it focuses on values that fit in machine registers, you might check out Hacker's Delight's section on computing "ilog10". In the second edition, section 11-4 is on integer logarithms. If your target
262.
by jepler 7y ago
But the math.log10 solution is unfortunately "wrong" too, at least in my python3 implementation. import math def digitLengthCorrect(n): return len(str(n)) def digitLengthClever2(n): return 1 if n ==
263.
by jepler 7y ago
we shoot for π uptime, or around 22/7...
264.
by jepler 7y ago
Hi! As someone moving from 20 years of application development towards embedded software development, let me share my thoughts. First, examine your reasons not to move into management or architecture roles and make sure they are valid, and
265.
by jepler 7y ago
I guess they care too much about portability to use "pragma GCC poison"?
266.
by jepler 7y ago
desktop metal are another company who have a product which starts with an FDM/FFF type process: https://www.desktopmetal.com/ [a friend works there]
267.
by jepler 7y ago
this midwest usa user is affected as well
268.
by jepler 7y ago
I haven't digested just how it works, but "if constexpr" is used to choose different, more efficient instructions, when "special" permutations are chosen. Here is the implementation for a 128-bit permutation: http
269.
by jepler 7y ago
almost certainly not.
270.
by jepler 7y ago
Compile workload seems to benefit from HT in general. In our software build process (extremely parallel g++ of around 9000 files, often cached by ccache), we have benchmarked with all threads, and with just 1 thread per core (via "task

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