Xah Programing Blog 2019-06
See also: Programing Language: Syntactic and Semantic Difference of Map Function
unicode missing emoji version of plain red heart
- ♡ U+2661: WHITE HEART SUIT
- ♥ U+2665: BLACK HEART SUIT
That's why only some website make them emoji, cuz if in poker context, rendering it as emoji would be wrong. So you have this abominational situation where you need to insert a modifier char to make it emoji.
🖤 U+1F5A4: BLACK HEART ❤ U+2764: HEAVY BLACK HEART ♡ U+2661: WHITE HEART SUIT ♥ U+2665: BLACK HEART SUIT so, completely, comprehensively, confounding! the abomination of unicode.
See Unicode Symbol Become Emoji
Unicode Linear B 𐂂
LISP Infix Syntax Survey
What's Mathematica's Pattern Matching
this is the symbol in unicode that came from Mathematica ⧴ U+29F4: RULE-DELAYED
In Mathematica, there are 2 mechanisms for computation. ① by function. (like other langs) ② rule based syntactic transformation. You define a bunch of transformation rules. Then, when expression is eval'd, it transform by known rules until result don't change.
Mathematica rule transformation, aka pattern matching, is like regex, but on source code instead of string. Or, like parsing and grammar in BNF. Or, think of lisp macro as a primitive example. Note, SYMBOLIC pattern matching is very different in nature from haskell ocaml etc on type.
Unicode Tacks and Turnstiles
Unicode Reference symbols
me = sleep(⏾, 😪, 😴 , 💤, 🛌);
u👷 = goto work(😪+😟+😵 💨 💪 🚗 🏭 🗩 🗪 🗫 🗬 🗭 📈 📉 🗮 🗯 💢 🔥 🤬 💩);
why reference is harmful
with more experience of golang, i find that it's not as high level as perl python ruby lisp bash. kinda middle, between those and C. golang code is some 1.3 times longer than python. Dealing with “references vs copy” is more pronounced.
the concept of “reference”, is truly the worst concept in programing. It is the number 1 source of bugs. I got stung by it in golang since yester. 4 hours spent so far. unable yet to describe what's going on clearly.
things like references, int, float, double, etc, is what i call software engineering side effect; underneath mumble jumble. typically, the gaggle of industrial programers are excited by these. Thus, the current fad of rust.
the problem of references shows up most when you deal things like “slice”/assignment of array/list (or nested) and trying to modify it. Result is one bag of transparent spaghetti.
one obvious way to fix the reference confusion, is to make it always explicit. so, instead of var x = [3,4,5], make it x = ref([3,4,5]). something like that.
This is the reference problem of golang:
var aa = sliceX[:n] var bb = append(aa, 3) // sliceX is now modified, it has 3 at pos n. wtf!
to fix the code, one has to start to make copy of things. to fix this in low level langs, am thinking, make ALL ref explicit? so that programer always know which is a copy or not. i understand ref is necessary in low level langs, but the implicit confusion is what i object to.
golang slice append problem. very subtle.
Unicode Math Symbols ∑ ∫ π² ∞
Unicode Punctuations and Symbols • ✓ † ™ ☙
Unicode in Function Names and Operator Symbol
this is when you need math langs, e.g. Julia, APL, Mathematica, Matlab. syntax matters.
fsf and open source has become a ideology weapon of big money corps, championed by google apple now Microsoft, with code of conduct. Each programmer is robbed into nothingness. only way to live is work for these corps.
Why I Love Golang
Urbit, Decentralized Server Platform
i wonder how Curtis Yarvin a.k.a. Mencius Moldbug is doing.
i never understood what curtis yarvin is saying. he likes to play with writing with holier than thou tone, but am not sure any understand. i think only yhose who studied political history for few years. also, he's got a thing against Noam Chomsky. what gives?
Curtis Yarvin left urbit https://urbit.org/posts/a-founders-farewell/
intro to urbit https://urbit.org/primer/
“we created urbit to leave internet behind”
the official urbit intro is confusing, even to experienced programmers. wikipedia intro is better https://en.wikipedia.org/wiki/Urbit
Urbit is a decentralized personal server platform. Each person (a programer), runs it on his own machine. This system, replaces centralized cloud servers such as amazon, google. But also, replaces all web apps such as facebook, twitter, slack, etc, whole internet.
Urbit is a decentralized OS, written from scratch since 2002. The OS is called Arvo, written in new functional langs Noon and Nock. Address space based on Ethereum blockchain. Communication is encrypted p2p using UDP.
blogs as history, and nature of dead links
Google Chrome, SPDY Protocol, Browser War II
when you write blogs, you leave a trail of history. This is year 2010. Sometimes, even you forgot what you were talking about.
looking back 10 years ago, Google's tens of sites singing html5/webgl/webworker etc are now dead link. i used to hate dead urls. But now, i realize it's a necessary fact of life. Links living forever (say just 10 years), is not just an ideology, but impossible.
vast majority of websites, serves a commercial purpose. (e.g demo of html5, tutorial of tech now 10 years old, etc.) When that purpose is gone, or the company gone, link becomes dead, and necessarily so.
programing video goes dinosaur
new version control system. written in rust https://pijul.org/
Unicode Box Art ░ ▒ ▓
Unicode Phoenician 𐤈
package manager for Microsoft Windows, scoop, chocolatey
seems there are lots new package managers for Microsoft Windows
new nav box
Unicode, Encoding, Escape Sequence, Issues
- Unicode Symbol for “e.g.” (exempli gratia)
- Semantics and Symbols: Examples of Unicode Symbols Usage
- Semantic of Symbol: Unicode Ellipsis Symbol vs Dot Dot Dot
- Problems of Symbol Congestion in Computer Languages; ASCII Jam vs Unicode
- Computer Language Design: String Syntax
- Syntax Design: Use of Unicode Matching Brackets as Specialized Delimiters
- Unicode Semantics: the ∀ in Turn A Gundam
- URL Percent Encoding and Unicode
- URL Percent Encoding and Ampersand Char
- Semantic of Symbols: HTML Entities, Ampersand, Unicode
Unicode Search ∑ ♥ 😄
some testimonial for my stuff. I need to put them somewhere. put it here for now.
Just need to say. I love @xah_lee website. Choc full of useful info of useful information.
2017-04-23 twitter fleontrotsky
A lot of content here: http://xahlee.info/index.html Very impressive! By @xah_lee
2017-04-19 twitter leifbattermann
Yep. I'm Nigerian programmer living in Nigeria. I really enjoy your articles on ergonomics, emacs, programming languages etc
2017-04-20 twitter SegunOlulana
unicode lambda is named lamda, no b
interesting that in unicode, lambda is named lamda. However, there is a char named lambda: ƛ LATIN SMALL LETTER LAMBDA WITH STROKE
see Unicode: Greek Alphabet α β γ
here's interesting things about lambda
apparently, it's pronunced with b in ancient times.
pronunciation as [laːbdaː] (λάβδα) in Classical Greek times. In Modern Greek the name of the letter, Λάμδα, is pronounced [lamða].
also note, its relation with Latin letter L and Phoenician letter Lamd 𐤋 and the Cyrillic letter El Л л
copy a directory sans .git
this sucks major. there is still no command to copy a dir sans .git. unix cp command can't do neither.
added insult is that golang no have copy dir builtin.