gregfjohnson

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by gregfjohnson 5y ago
A helpful concept from Thomas Keating is "the evacuation of the unconscious". The idea is that it is normal to have painful thoughts arise into our consciousness when we enter into meditation. It is common in ordinary life to ge
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by gregfjohnson 5y ago
Here is a hypothetical bash script that neatly characterizes the the impossibility of solving the halting problem: "loop_iff_halts_on_self.sh". What does ./loop_iff_halts_on_self.sh loop_iff_halts_on_self.sh do?
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by gregfjohnson 5y ago
I'm 67, and am in the final stages of my career. This article resonated, and made a lot of sense based on my own personal experiences. Early in my career, my head was full of fantasies and ambitions about entrepreneurship, being a fo
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by gregfjohnson 5y ago
To elaborate slightly; (1 + i) * (1 - i) = 1 - i^2. The left side is somewhere on the complex plane on a circle of radius 2 centered at the origin. The right side is somewhere on a circle of radius 1 centered at 1. The circles meet at on
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by gregfjohnson 5y ago
A very helpful intuition is to consider a notion of "Compass numbers"; one might say, "the nearest coffee shop is East 2 blocks and North 3 blocks". One might say the the real numbers are restricted to just two direction
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by gregfjohnson 5y ago
A similar collection, some really funny: https://www.jetblue.com/flying-with-us/our-planes/plane-name...
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by gregfjohnson 5y ago
My goal: predispose myself to be receptive to the gift of inner transformation. I have four words that resonate these days: wise, thoughtful, mature, sane. As a Catholic Christian, I see a good deal of unwise, unthoughtful, immature, an
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by gregfjohnson 5y ago
This is fantastic! Marvelous piece of work, thanks.
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by gregfjohnson 5y ago
A Danish cartographer named Caspar Wessel came up with an early formal treatment of complex numbers, in his work "On the Analytical Representation of Direction" (wikipedia has a nice article about him). It was published in an ob
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by gregfjohnson 5y ago
While this post seems to have fallen off the HN front page quickly, thanks for posting it. The identification of three streams of “Catholic Enlightenment” seems useful. It is interesting to consider the manifestations of these three stream
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by gregfjohnson 5y ago
Excellent observations. The essay illustrates what it is advocating by the generous clarity, simplicity, and accessibility with which it is written. John Osterhout wrote what may be the best elaboration of this perspective in his wonderful
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by gregfjohnson 6y ago
Echoing other responses, I've found that trust is a hugely important dimension of effective teams. In a technical setting, there is a key benefit to trust. Do you trust your mates enough to share an idea that you feel is probably stu
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by gregfjohnson 6y ago
It fills me with joy the HN is sufficiently eclectic to have an article such as this. Thank you, OP!
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by gregfjohnson 6y ago
I really liked #48, "Keep your identity small." There is a lovely and profound story, the culmination of which is "he heard a still small voice." It occurred to me recently that this is something that can be internaliz
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by gregfjohnson 6y ago
I see two problems with the solving animation - it is fast, and also you can't tell what the intermediate goals are. To your point about giving visual hints - I've toyed with the idea of highlighting the cubie that is being moved
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by gregfjohnson 6y ago
As of now, the radio buttons have no labels. I will fix this! I have tested pretty minimally - just on the platforms I have within arm's reach ;-) This includes Safari on my smartphone and an iPad, and Chrome on Linux and Windows.
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by gregfjohnson 6y ago
(OP) Yikes! I will check that out. Thank you for pointing that out. As of now, the four text buttons should say "Scramble", "Solve", "Record" and "Rewind". I will check with Firefox to see if I ge
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by gregfjohnson 6y ago
Thanks, I will make that change!
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by gregfjohnson 6y ago
(OP) You're right - left-mousing outside of the cube and moving the mouse around re-orients the cube. Left-mousing a face and dragging across one of the four boundaries of that face will rotate the face in the direction of the boundar
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by gregfjohnson 6y ago
This is an ongoing JavaScript learning exercise. Tons of fun. I used THREE.js for the 3-d effects. It includes a (really inefficient!) solver. There are radio buttons that select from among eight sub-problems that progress through levels
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Show HN: Interactive Rubik's Cube with sub-puzzles for solution steps(gregfjohnson.com)
51 points by gregfjohnson 6y ago|23 comments
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by gregfjohnson 6y ago
Absolutely agree. I had a similar experience. 30-character camel case names are no substitute for a well-written comment. What I've found works well is to view a comment as the topic sentence of a paragraph. For each section of cod
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by gregfjohnson 6y ago
Google has a nice little Easter egg if you google "recursion". (It does miss the base-case component of recursion as noted above, but still, it's good for a laugh..)
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by gregfjohnson 6y ago
I would be interested to hear the various things this (initially shocking) phrase means to people. The transformation of consciousness that it invites may be a function of the consciousness of the person considering it. I.e., it might mea
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by gregfjohnson 6y ago
Related: "Beginning programmers write simple code. Intermediate programmers write complicated code. Masterful programmers write simple code." In the context of this discussion, "masterful programmers" could be considere
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by gregfjohnson 6y ago
An interesting observation from this line of work (based on other articles in the area): the silence of owl flight depends on the frequency of the sound. Mice have a range of frequencies that they can hear. If you line up the two curves,
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by gregfjohnson 6y ago
I wonder about the relationship between consciousness and Turing completeness. Although we don't have infinite tapes inside our heads, it seems that one could imagine a succession of progressively richer finite approximations to Turin
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by gregfjohnson 6y ago
The Hacker News comment section tends to be factual, rational, and logical. So - this may be out of place, but here goes. When making decisions about whether or not to have children, we operate in a state of partial information. (This is o
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by gregfjohnson 6y ago
It is interesting to speculate about how a technology affected the zeitgeist, and directly or indirectly influenced subsequent work. My first programming language was APL, and it profoundly influenced how I think about programming. Lately
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by gregfjohnson 6y ago
I'm a young pup compared to the OP - started programming in 1973 (unless you count the DigiComp I..) My children had a license plate frame made for me that has has my current title (at least around the family): Granddaddo, Gerihacktr

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