justforfunc #19: mastering io.Pipes

We've all used a bit of the io package ... right?
Implementations of io.Writer and io.Reader can be literally found everywhere ... but do you really know the io package well?

In this episode I write a program to do cat images into iTerm2, and to do that I use the best pieces of the io package.

I use four types in the io package:

[JustForFunc]

It turns out I can't add links to the the video from this video ... which is sad, but if you wanted to skip the io.Pipe basics and go into the iterm2 imgcat program it's 11:45

[luizfelipemartino]

Hey Francesc, thank you for those videos man, I really like it.

I'd like suggest you talk a bit about architecture, I know it's a bit subjective but We've got lots of design patterns and stuff for OO and since go has a sort of new paradigm would be nice to learn a bit more about it

[abiiranathan]

Am your biggest fan. Your videos are very educational, fun and to the point. I wish you a million subs and beyond

[yann]

Nice video ! For this kind of complex things, maybe you can provide some visuals of what's in, what's out and interactions with pipes? Thank you, I really like your videos !

[silence]

Thank you for interesting introduction to io.Pipes.

[leonklingele]

Where does the trailing % @ 8:58 come from? I've seen that one before but never really understood why it happens.

[saadazzz]

Hey Francesc. Thanks for the instructional video. I have a question. How do you do async I/O in Go? All of these examples seem synchronous? Would I have to use channels instead of pipes?

[Shan-fxwv]

How to create a named pipe and write a content to it?

[kitgary]

So cool! I made similar mistakes, I even don't know that is wrong.

[Shan-fxwv]

Syscall.Mkfifo is not getting imported

[AlbertoRestifo]

Amazing and instructive as always Francisco!

I have one question: in the imgcat package, you defined the `writer` struct as an unexported variable, despite the fact that is returned by an exported method.
Why does this work?

[MagnusAndersson]

This should be called "how to write enterprise code"!
"This is a working program, let's add go functions, channels and interfaces!"

Still, you just earned a subscriber :D

[BryanChance]

OMG, i thought C is convoluted. LOL And all the err err err err err. (I've never used Go before. just my first impression)At 36:55, line 64 "<-w.done" what does that do?

[nbari]

Hi Francesc, first at all, many thanks for all your time invested on this and by sharing knowledge in a very creative way.


I would really appreciate any feedback, thanks in advance.

[vikramdurai]

11:02 laziest person I've ever seen. Why not just "mw.Write([]byte('hello'))"? Use what it has already man