There is so much potential with this program.
This is a non-AI chatbot. It's not based on generative AI or AI of any sort.
It is self-explanatory, it tries to give a better answer.
Still a work in progress.
Source code is in PP.rb
Generates a hyper optimized C program that is able to respond to prompts locally as fast as theoretically possible using switch statements
See also
Chat Rb
The use of Javascript (and possible Ruby) to create a Javascript library (and perhaps a Chrome extension and perhaps a command line tool and perhaps a GTK or QT program) that helps people (by using textboxes or command line prompts) to create high quality communications, would be wonderful.
Think of how poor quality responses to communications can be.
If someone created one or more tools that could be easily added on web pages, that would augment someone's life to help create goal and value oriented responses (or original communications), then there is literally nothing that couldn't solve.
This might be the most useful library ever created. There could be a tool that would help with democracy.
Human being + augmentive tool = civil discourse, eventually resulting in liberty.
This would enable democracy to work. Imagine if 50% of all websites used this library.
This would help people to be goal or value oriented, and not be coming up with terrible communications that, for example, insult people's mothers or education.
This is like gsub, but for strings, not for regular expressions
See also
gsub
replace_in_place tool replaces a string, not a regular expression, with another string
Example
replace_in_place cat dog file
Emerald browser is a really powerful new browser
See README
It works based on panes.
Read the documentation for “open”, “close” and also the README file.
gsub_in_place is like gsub, which replaces all instances of a regular expression globally
[regular expression 1] [regular expression 2] => result
Example
gsub_in_place . FOO file
Would make all characters in “file” become “FOO”.
gsub_in_place cat dog file
Would make all instances of “cat” “dog”
It is much cleaner than “sed”.
You don't need to have “sed” installed to run this program.
It doesn't read from the standard input
It takes exactly 3 arguments, no more, no fewer.
See also
gsub
This is a nice tool to find housing with.
It is a nice, simple command line tool. You enter the minimum and maximum prices, and Kijiji opens with your options.
This tool kind of actually helped me to find housing in real life.
The default city is "Ottawa". You can easily change this.
Google speak is really useful. It speaks a statement using the Google Translate voice, which is probably the most authoritative and high-quality text-to-speech voice that exists.
It's kind of like “espeak” or similar tools, but it is much better.
You need an internet connection for it to work.
It is probably limited at 100 characters.
There is a “singing program”, not really a tool, in this software project that gets around that.
TODO
Make the alarm clock program in this software project use this voice.
It is quite reliable.
It is probably “unlimited”.
I haven't had Google block me from using it ever.
Which is a good thing.
make_server is powerful.
make_server takes expressions, either Javascript or C++, and generates a resultant program from that.
The Javascript mode currently doesn't work.
Not only is a program made, the resultant program is an entire webserver, that uses FastCGI to run really fast code.
The arguments work in an interesting way.
make_server [function_name] [iterable] [condition, it can be “true” to do the following argument always] [code list separated by semicolons, the last statement is an expression, and is returned by the function] [function_name2] ...
You have to give 4 arguments every time.
There was an “otherwise” mode as an “else”, but I don't think that's a part of the program anymore.
It doesn't need to be.
You have to give 4 arguments for each function.
So you can do
make_server 4args 4args 4args 4args
And pass 16 arguments
The “iterable” has to be a list.
What is powerful is that it converts JSON into completely native C++. It is very efficient.
It doesn't need to be a JSON expression though.
There is a test file.
You can run the tests and see if it works for you!!
You can also modify the code because it is open source.
The program generates a special array object. It is lightweight and makes arrays act in C++ like arrays act in scripting languages, but much faster.
The array class also has methods to apply things to every element of an array, like surround
array.surround(“
for example
would surround all of the elements of array with XML tags and return a new list
This program generates a lightweight Object System, with a BasicObject class and an Object Class.
You can subclass these objects.
You can have Arrays of the Objects
The function argument syntax is really powerful.
Oftentimes people want to iterate through iterables or arrays.
Oftentimes people want to check conditions.
Python has list comprehensions.
This is kind of like that, but simpler.
You can have arguments as one argument, separated by “,,”
make_server arg1,,arg2,,arg3,,arg4
What's the point of using a scripting language when you can use C++?
This uses FastCGI, so you can have an ____IDEAL____ webserver.
You can have an IDEAL and very affordable website, that in a sense would be faster than Facebook.
Facebook converts PHP to C++ (slow)
This produces REAL C++, and it is very fast, almost as fast as possible.
Native STL classes are used, like vector.
Native STL classes are used, like vector and map
Do you not need to run and child processes or do slow, costly things.
You should want IDEAL.
This is free software, and is BSD licensed.
The function generation idea allows you to write in 1 line what other people might write in 50 lines.
You do not need to compromise your ideals.
You should want fast, efficient, and memory light programs that are not garbage collected (!!!) and that have reliable performance.
C++, as everyone knows, delivers that.
You should also want to not have to write a lot of code to do things.
And you should also want safe, compiled code that checks things at compile time, so that bugs don't appear at run time.
This program delivers.
It uses NGINX ( a really, really common webserver) to help with the FastCGI.
FastCGI, for the unfamiliar, is like normal CGI, but there aren't child processes.
So the entire server could be written in idealistic C++ .
Then you just have to think about scaling.
There are some relevant links regarding scaling in the “scaling” file in the democracy project
1) Speed
2) Ease of writing code
3) Memory usage
4) Monetary costs
5) Elegance
6) Practicalness
Those are 6 things.
You don't have to sacrifice on those things.
Contributions on this program would be really appreciated.
It is called “make_server” for now.
There was also a mode to generate javascript.
I have to make that work again.
The entire program is just one file.
My email is gregorycohenvideos@gmail.com
selectlines shows all nonblank lines from the input
Example
cat file | selectlines
(echo 2; echo; echo; echo) | selectlines
=> 2
The result would be 2, with no blank lines after that
Communicate is cool.
Communicate runs a Ruby expression after speaking a prompt (the first argument) and getting your verbal answer (using something unfortunately called "nerd-dictation", which is a wrapper around another program which deals with speech recognition)
Communicate allows you to have conversations with your computer, and it is cross platform
(Or it hopefully is)
communicate 'What is the best color?' 'case text; when /blue/; puts "You are right!"; when /red/; puts "Red is a bad color"; end '
That would be an example of how one could use "communicate"
Make sure you have nerd-dictation on your computer
The name nerd-dictation is absolutely awful, and I have to criticize him for not making it have a better name, but it works.
Makes all the files in the current directory executable
Processes lists all processes with a certain name
For example
processes sh
processes bash
processes ruby
processes gsub
The Ultimate C Preprocessor
I'm naming this preprocessor “Emerald C.”
Link
Howdy!
First, let me state that I am very much a perfectionist.
C is a wonderful language. C is probably the perfect programming language. It is one of the top two most widely used languages for a reason.
Now, there are some problems with it of course, but it's hard to think of a more elegant language than it.
It is the language of systems, the language almost all APIs are written in.
It is the lingua franca of the software world.
People try to avoid it, but they needn't.
I think every programmer wants to find out how to do things, or use libraries that make things easier.
Many programmers have done programming, grown dissatisfied, and then make another language. As a result, there are thousands of different languages.
Well, recently, I made a preprocessor for C, that makes C incredibly EASY.
C is fast and straightforward without it, but it has many features.
If one runs the command line preprocessor, with the “--features” flag, the program shows all of its features
A Better C
C is a fantastic language. C compiles insanely fast, is the fastest language there is, is very clear, is native to all systems, and is useful for all purposes.
Some people, e.g., Bjarne Stroustrup, consider that C is “not good enough”, and make languages like C++ or D (or thousands of others)
This is not necessary.
There is no reason to use Python instead of C for “simple scripting tasks”
Some functions can be used as methods
Makes for an excellent “scripting language” (which is really just native C without things making it slow)
1 String Interpolation “String interplation like this #{foo} ” Calls the join() function (talked about below to join strings,
delim is a static global in each module called “sep”.
Make sure you free() the string after. The string is stored in a static global variable called “last”.
So you could do puts(...); free(last)
2 ew *i.ew “Foo”, a.ew “bar” | char* ends with another char*?
3 sw *i.sw “Foo”, a.sw “bar” | char* starts with another char*?
4 == Comparison of strs, “foo” == “bar”
5 strip Returns pointer to string that was stripped, in place
6 chomp void function, chomps end of string of spaces, i.chomp or chomp(i), in place
7 gsub Just like ruby, there is a gsub function.
The preprocessor detects if you use and adds -lpcre2-8 to the link flags if you use it. Use $" for substitutions in argument 3 gsub(a, b, c)
8 join Joins an array of strings, to split(), use C's strtok (very fast)
9 Lightweight regexes are added, almost 15 times as fast as C's built in regex. They are very simple, they only have bracket expressions, like [a-z].
To use it, you need to pass a buffer of the size of the expansion of the regex. Foo[a-fA-F] would be Foo[abcdefABCDEF]. That would be stored in a buffer.
From testing, 15x times faster than C's regex POST COMPILATION, if compilation keeps happening, it might be hundreds of times faster.
Uses static inline functions, NO HEAP MEMORY unless you malloc before().
10 print Like old python print “Hello” (fputs);
11 print_int prints a number and returns the number, can be chained
12 each_line, Perlish, different names, by_line(s) or each_line(s), iterate over all lines, free after
13 NOTE You can use open_memstream() on UNIX to easily concatenate strings.
14 MISC features || autoinclude, foo.gsub or gsub(...),no need for paren (i.chomp, i.strlen), starts_with, ends_with, --wrap, itoa, freel (frees str, sets to NULL, and frees other recent stuff)
asprintf() is another useful function which is UNIX-centric. open_memstream() could be an alternative to std::string.
It works very well with each_line or by_lines (see above)
These features seem simple, but they can make C programming much, MUCH easier
for example (insignificant example)
int main() {
stdin.each_line { |line|
print line;
}
free(line);
}
You can iterate over the standard input like Ruby
The thing with this is that it has 100% speed. The resultant preprocessed program becomes a normal C program
The compile and run time for a program (if you use tcc and not gcc) can be about 24 milliseconds, which is faster than Ruby to run.
Even though the program is preprocessed, re-preprocessed, compiled, assembled, linked, turned into an executable, and then run
Kind of like early C++, this is a preprocessor for C.
But it's much faster to compile than C++. Significantly so.
Is anyone else interested in this? (BSD)
I'm realising this under the BSD license. I'm interested if anyone else else likes this work, and would like to use it, or to work with me.
Best regards,
Gregory
Current program is written in Crystal (crystal-lang.org) -- it was written in ruby, it could be ported to another language.
I would like to make this self-hosting, but that would take a little bit of work.
About the Name
Years ago, I really, really liked Compiz
Compiz then forked into Beryl. There was the Emerald Window Manager, which was really nice and beautiful.
I actually made another programming language. I made 2 other programming language. One was a full compiler and assembler, that ran code in memory. It was around 16 thousand lines of code. I made a programming language that had the syntax of Python or Ruby, but transpiled into C++. I called that C += 2. I used that other language, and I created a Web Browser in it based on Chrome. I called it “Emerald Browser.” Emeralds are beautiful green gems.
“Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of chromium or sometimes vanadium. Beryl has a hardness of 7.5–8 on the Mohs scale. Most emeralds are highly included, so their toughness is classified as generally poor. Emerald is a cyclosilicate.” --Wikipedia
There was a browser with a terminal built in to it.
This new language is better. It's ideal.
QUESTIONS
Why not use Rust?
$ time rustc a.rs
real 0m0.637s
user 0m0.502s
sys 0m0.160s
Rust takes 0.637 seconds to compile an empty file!
That is not ideal.
Last nth gets the last n lines from the standard input
Speak cat is a tool like “cat”, which shows the content of files (technically, it combines the content of files).
But speak cat also speaks the text.
Which could be useful in some circumstances.
It's kind of like “tee” to your ear.
CLI for uca app
Squeeze reads all input from stdin, then it prints it back omitting argument 1 line from the front, and argument 2 lines from the back
Example
squeeze 1 1
This would omit the first line and the last line
squeeze 5 3
This would omit the first 5 lines and the last 3 lines
squeeze 2 2 [file] also works, it outputs text to file
Reads a bunch of lines
Then a ruby expression is evaluated as the last line
The result is outputted in an argument.
You can enter /dev/null if you don't want an output file
“t” is better
See also
t
Dictate opens web pages in emerald browser, or in any browser (depending on the environment variable set), by you speaking, instead of typing.
There is a mode called c_mode, that allows you to make code from speaking.
prepend prepends input taken from the standard input to a file
Usage
prepend [file]
This is text to be prepended
This program is excellent.
It's essentially a mix of ChatGPT and a shell, such as bash or ZSH.
It has a bunch of features.
It can display a file or change to a folder just by mentioning it.
It outputs chatgpt data to an output folder in home folder and copies it to clipboard
To run a shell command, prefix things with “c”, such as c gcc.....
undump is the opposite of dump
Example
echo cat | dump | undump
=> cat
echo cat | dump
=> “cat”
echo '“cat”' | undump
=> cat
Appends text to file
Example
append file
This is more text to be appended
A very powerful music generator program that doesn't use AI.
See this channel as an example of potential usage of this public domain content
https://www.youtube.com/@LawrenceStevensMusic
The music industry is plagued with very foundational problems.
For starters, the quality of the discourse in music is very low, and has been from the start of the popularization of modern music, as well as during the era in which classical music was popular and before.
People aren't able to fight back, against superficiality and potential deception in messages.
One of the greatest problems in the current world is the mainstream scientific establishment, supported and upheld by mainstream academia.
To indicate what is already obvious, it exists in the context of a legacy of authoritarianism and a lack of understanding of dynamism.
It is not dynamic or forceful, the "results" of it don't change the foundation of society. True free discourse is not supported, especially in regards to the human mind and human well-being and human freedom.
These problems should be opposed and fought, it is self-evident that this would be the best use of ones time, for it would lead to true freedom.
One excellent way to combat this would be to use the generated songs generated by a computer program called Rhyme, available at https://www.github.com/gregoryc/democracy in the SONGS folder.
These are public domain songs generated by non-Artificial Intelligence, just a program
that introduces variance, and these hit-home against the status quo and the current
state of the mainstream scientific establishment. Taking these songs and making actual
songs from such, such as rap songs using a service such as Uberduck (no affiliation),
would be an excellent, excellent use of time.
The mainstream scientific establishment and mainstream academia must be forced to change.
Shoving art and flippant content in ones face, is the best way of doing such.
Accountability must always be brought about.
Is music good and desired? For sure.
USAGE OF PROGRAM
Enter basename to make songs folder in (folder/songs, num songs = 13000)
Usage rhyme [folder] (processes files "1.json" and "21.json" by default)
Example output of a song
(NO COPYRIGHT RESTRICTIONS ON THIS CONTENT WHATSOEVER. FULLY PUBLIC DOMAIN)
Name the song or poem as you wish, resell it, but please positively influence culture
Subject matter | Category 1 -- Abuse of philosophical universalism (making
broad claims while intentionally not trying to understand things or see
any sides of anything whatsoever, childish behavior worse
than a 3 year old, acting retarded)
VERSE
Brittle as possible, they are truly unguarded
Any novelty, they have disregarded
Their remissness is spectacular, the world they've bombarded
The clique is so insular, I swear they're retarded
Enlightenment values, they have not safeguarded
Any novel ideas, they automatically have discarded
Maybe the rebels and true communicators are off the grid
Lack of thought makes an grown-up the absolute worst kid
Can we stop this, their non sense they overdid
What horrendous non sense these creeps did
Tunnel vision, everyone and everything they forbid
They're such failures, themselves they outdid
CHORUS
They're such failures, themselves they outdid
Cutting out the conversation, putting on the lid
Don't have to do with ego or id
Running away from conversation just like a kid
Their neglect is out of this world, I swear it's avant-garde
They are failures, down at the boulevard
They don't care about your feelings, they don't regard
Having a little curiousity, cannot be hard
They are failures, down at the boulevard
They don't care about your feelings, they don't regard
They don't have decency, they automatically disregard
Having an open mind, should not be so hard
They don't care about anyone, don't need no bodyguard
Their neglect is out of this world, I swear it's avant-garde
They're a complete failure, they only neglect
This is plain, anyone can detect
They don't care about pain or the past, they don't want to recollect
This needs to be called out, one should be direct
They want man lower, lower just as if an insect
VERSE
Thinking itself resides in their territory of circumvention
Complete neglect, complete inattention
They have no genuine intention
We need change, we need intervention
Violence is second nature to them, their friends they've bombarded
Any novel ideas, they automatically have discarded
The clique is so insular, I swear they're retarded
Any novelty, they have disregarded
Any novelty, they have disregarded
Brittle as possible, they are truly unguarded
The clique is so insular, I swear they're retarded
Any novel ideas, they automatically have discarded
Enlightenment values, they have not safeguarded
Their remissness is spectacular, the world they've bombarded
They don't care about your feelings, they don't regard
Their neglect is out of this world, I swear it's avant-garde
They don't have decency, they automatically disregard
Working don't matter for this, whether day or graveyard
CHORUS
They're such failures, themselves they outdid
Cutting out the conversation, putting on the lid
Don't have to do with ego or id
Running away from conversation just like a kid
Their neglect is out of this world, I swear it's avant-garde
They are failures, down at the boulevard
They don't care about your feelings, they don't regard
Having a little curiousity, cannot be hard
They are failures, down at the boulevard
They don't care about your feelings, they don't regard
They don't have decency, they automatically disregard
Having an open mind, should not be so hard
They don't care about anyone, don't need no bodyguard
Their neglect is out of this world, I swear it's avant-garde
They're a complete failure, they only neglect
This is plain, anyone can detect
They don't care about pain or the past, they don't want to recollect
This needs to be called out, one should be direct
They want man lower, lower just as if an insect
VERSE
The truth is what they wish to disregard
Their behavior is garbage, it should be thrown in the junkyard
They act like a retard
Behaving just like in the schoolyard
In their ivory tower, with the castle and guard
Their behavior makes them charred
Thinking differently shouldn't have to be hard
Their neglect is out of this world, I swear it's avant-garde
Working don't matter for this, whether day or graveyard
They don't care about your feelings, they don't regard
They are failures, down at the boulevard
They don't have decency, they automatically disregard
They're a complete failure, they only neglect
They don't speak the language of the people or their dialect
This is not right, this is completely incorrect
The only focus on “responses”, they just want to deflect
The lies are put forth, the lies they erect
CHORUS
They're such failures, themselves they outdid
Cutting out the conversation, putting on the lid
Don't have to do with ego or id
Running away from conversation just like a kid
Their neglect is out of this world, I swear it's avant-garde
They are failures, down at the boulevard
They don't care about your feelings, they don't regard
Having a little curiousity, cannot be hard
They are failures, down at the boulevard
They don't care about your feelings, they don't regard
They don't have decency, they automatically disregard
Having an open mind, should not be so hard
They don't care about anyone, don't need no bodyguard
Their neglect is out of this world, I swear it's avant-garde
They're a complete failure, they only neglect
This is plain, anyone can detect
They don't care about pain or the past, they don't want to recollect
This needs to be called out, one should be direct
They want man lower, lower just as if an insect
VERSE
They don't have decency, they automatically disregard
They don't care about your feelings, they don't regard
Having a little curiousity, cannot be hard
Their neglect is out of this world, I swear it's avant-garde
They want the status quo, it's all they crave
The speeches of the past, they only wish to engrave
They act as bad as possible, they don't know how to behave
Their sucked in their circle, they never wave
Away from the truth, on the outskirt
With pre-thought of ideas, they automatically assert
Any progress is fleeting with them, they revert
Disingenuous to the extreme, the society they subvert
The society is the ones who hurt
---
This currently doesn't work for gmail since 2022 due to policy changes.
A simple and practical tool to email people using Himalaya
Himalaya needs to be installed first
You would need to configure the script by changing its source code.
Modes
email [no arguments]
Email [yourself]
email [addr]
Email one email address
email [Subject] [addr] [option more addrs]
Example
email 'Gregory, I love your software!' gregorycohenvideos@gmail.com my_friend@outlook.com person@example.com
Gets the floor of numbers e.g. 21.3 -> 21
Recursively replaces text.
Verbosely tells you everything that happens.
Non-regex.
Example
rgsub my_email@site.com my_second_email@site.com
Would replace an email recursively in a directory.
It tries to skip non-text files.
Lines gets the number of files in the current folder that you are in.
It can also act like “wc -l” if you pipe data into it.
clock is useful
clock is a command line alarm clock
It wakes you up at 8:14, or at a time specified
Usage
clock
Runs clock
clock 15 30
Sets an alarm clock for 3:30pm
clock 9 0
Sets an alarm clock for 9 in the morning
It uses flite to wake you up
It speaks with a bunch of voices
To stop it
Run this command
clock stop
Emoji converts words to emojis from the standard input
It can also speak the output
It can also copy the output to your clipboard
It is very useful
“Close” is a simple program that closes “Emerald Browser,” a new web browser based on the same engine as Chrome. Currently, Emerald Browser only works on Linux and Mac (Or Windows with Windows Subsystem for Linux or a Virtual Machine, but getting it to work might be tricky).
“close” closes the Web Browser, which is normally full-screen.
More accurately, it kills the browser, and all other copies of Emerald Browser.
Since they are normally full screen, presumably the user would only have one instance of the browser open.
The browser can have multiple panes (kind of like tabs) open, depending on how the browser is compiled.
The browser can also be transparent, depending on how it is compiled.
“Close” is supposed to be used in tandem with “open,” which is a command line tool to open the browser.
open [query] ----> [query] gets searched in google, and then opened
When you are done, you can do
close
Which closes the browser. It is a simple command.
Currently, Emerald Browser is incomplete. A program exists in this software project that allows you to open up multiple browser tabs (one or more tabs) simply by speaking.
Voice recognition would google the multiple sites that you say in your query (separated by “and”)
“facebook and youtube and google”
It's hard to get more direct than that!
Emerald browser has a built in the top. The terminal is the navigation bar.
Some more work needs to be put into the browser.
Currently, new tabs can't be opened, which might be a dealbreaker for some people.
Currently, content, like YouTube videos, can't be made fullscreen.
If anyone wants to contribute, feel free to!
copy copies the standard input
Example
ls | copy
Gsub is very powerful.
Usage
gsub [regular expression] [replacement text]
Example
cat text | gsub man dog
cat text | gsub 'man|boy|cat|dog' food
ls | gsub Desktop cat
Gets the news from bbc
Usage
news
news speak
uses google_speak to SPEAK the news, one story at a time.
Dump surrounds its input with quotes
ls | dump
=> “....”
Use undump to get the reverse
See also
undump
args is like a better xargs
args works properly with spaces in the name of commands
It takes exactly one argument
Example
ls | args “mv -t ../f”
Turns quotes in text into good text and makes text presentable.
Example
$ echo 'Joe said, "One two three".' | quot
Joe said, “One two three.”
Example 2
quot < essay
Example 3
(Quote the file and output it)
quot text_file
“open” is a very efficient program that searches a query from google, and then opens it in Emerald Browser.
If you ever want something to “just open”, you can use it.
Example
open “cats”
An earlier version of open worked like this
open [site1] [site2] [site3] N
site1, site2, and site3 would all be opened, and the top N queries were all shown in different panes
An even earlier version of this program used Chrome to open the sites.
The current version can open one or more sites.
Example
open “cats” “dogs” “frogs”
All of those queries would open in Emerald Browser.
Just make sure it is compiled in multipane mode if you want to open multiple new sites at the same time.
See also
emerald-browser
close
Swaps two files
Example
swap text1 text2
exp is an exponentiation tool
(echo 5; echo 3) | exp
=> 125
(echo 2; echo 10) | exp
=> 1024
Divides numbers
Example
(echo 5000; echo 100) | div
=> 50
Multiply numbers
echo 1 > file
echo 2 >> file
echo 3 >> file
echo 4 >> file
echo 5 >> file
cat file | mul
=> 120
Nth gets the nth line from the input
Abs gets the absolute value of an integer
The absolute value of a number is the value of that number without its sign
echo -300 | abs
=> 300
echo 200 | abs
=> 200
(echo -2; echo -10) | sub | abs
=> 12
The last one would do -2 - -10, the result would be -12, and then the absolute value would be computed, and so the result would be 12.
See the sub example
add adds integers from the standard input
(echo 1; echo 2; echo 3) | add
The result would be 6
Sub is a simple command line program that subtracts integers.
For some reason, no simple program did this.
Which is weird
Example
sub
(Input)
10
3
1
Result =>
6
Example
(echo 5; echo 2) | sub
Result =>
3
A compiler for C += 2. If you want to use C++ with Python syntax, you can use this.
Usage is like g++
Example
g+ a.cpp -o out
See also README file & emerald-browser and its source
“t” is incredibly useful.
It can be used many, many times every day by computer power users.
It is kind of like “sed”, or perl, python or ruby.
It's the ULTIMATE shell “glue” tool.
t reads every line from the standard input, and for every line, it evaluates a ruby expression
t a + 2
would add 2 to every line
Number automatically get converted to numbers in Ruby.
So one doesn't have to worry about that.
The “value” of the line of STDIN is any letter of the alphabet.
So choose any letter to do operations on and it will work.
You can also do
t a + 2 if a % 2 == 0
And you get a Python list comprehension sort of thing from the command line
It is a lot simpler and easier than using awk, Ruby, Perl or Python
You could also have loops
echo “One line” | t a while true
The second line, again is a Ruby expression.
You can have really complex expressions on the second line.
You can even import modules.
cat /usr/share/dict/words | t 'a + “ is a good word.”'
That processes every word in the dictionary, and says that every word “is a good word.”
There are other programs in this software project like “t”.
But if you do command line text filtering, t might be the best tool that you will find.
See also
gsub
gsub_in_place