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“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

gsubip

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Version data entries

34 entries across 34 versions & 6 rubygems

Version	Path
ufos-1.0.94	./documentation/t
aliens-1.0.94	./documentation/t
freespeech-1.0.94	./documentation/t
elonmusk-1.0.94	./documentation/t
politics-1.0.94	./documentation/t
democracy-1.0.94	./documentation/t
democracy-1.0.93	./documentation/t
ufos-1.0.91	./documentation/t
aliens-1.0.91	./documentation/t
freespeech-1.0.91	./documentation/t
elonmusk-1.0.91	./documentation/t
politics-1.0.91	./documentation/t
politics-1.0.89	./documentation/t
ufos-1.0.87	./documentation/t
aliens-1.0.87	./documentation/t
freespeech-1.0.87	./documentation/t
elonmusk-1.0.87	./documentation/t
politics-1.0.87	./documentation/t
ufos-1.0.88	./documentation/t
aliens-1.0.88	./documentation/t