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From YouTube: Rust Linz, December 2020 - Stefan Baumgartner - The Exercist (Learning Rust Lightning Talk)
Description
The Exercist
Do you want to know a new programming language and don't know where to start? Do you have a certain project in mind but are scared about all the concepts you have to pick up to reach your goal? Going back to basic algorithms and Programming 101 exercises can help a lot! I want to show you exercism.io, a platform that helped me a lot in learning Rust. Maybe it's the right platform for you, too!
About Stefan Baumgartner (https://twitter.com/ddprrt)
Stefan Baumgartner works at Dynatrace. He writes for Manning, Smashing Magazine, and A List Apart and made the Kessel run in less than 12 parsecs.
In his spare time, he organizes ScriptConf and DevOne in Linz and co-hosts the German language Working Draft podcast. Stefan enjoys Italian food, Belgian beer, and British vinyl records.
Rust Linz at https://rust-linz.at
Twitter: https://twitter.com/rustlinz
Speak at Rust Linz: https://sessionize.com/rust-linz
A
A
There
are
a
couple
of
people
here
who
who
barely
have
have
scratched
the
surface
of
rust
and
who
have
barely
had
the
chance
or
opportunity
to
dive
deep
into
into
rust
as
a
programming
language,
let
alone
create
some
some
some
production
code
with
it,
some
some
systems
that
run
and
use
by
really
users,
not
just
just
demos
and
as
it
turns
out,
I
myself
had
the
same
problem
I
most
of
the
time
I'm
writing
javascript
and
typescript
for
about.
I
don't
know.
15
years
now
I
haven't,
I
haven't.
A
I've
barely
touched
a
different
programming
language,
but
rust
was
one
of
those
programming
languages
who
caught
my
interest.
It
looked
interesting.
It
was
the
people
around
the
community
had
a
great
way
of
describing
it
especially
you
know.
Ryan
levy,
who
was
here
at
the
very
first
justlyn's
meetup,
was,
was
a
guest
in
my
podcast
once
and
did
some
some
some
great
introduction
to
rust
and
ever
since
I
wanted
to
try
it
out,
but
I
had
the
problem.
A
Basically,
almost
any
programming
language
like
I
have
to
pick
a
little
bit:
52
broken
language
languages
through
a
tool
called
the
exorcist
and
I'm
going
to
share
my
screen
now,
because
I
guess
that's
still
missing,
you
should
see
my
entire
screen
right
now
alrighty.
So
this
is
the
exorcism
homepage.
It's
called
exorcism!
A
That's
why
my
talk
is
called
the
exorcist
and
it's
code
practice
and
mentorship
for
everyone.
This
is
their
tagline.
What
you're
doing
is
providing
an
interactive
system.
You
you
sign
up
to
so
called
tracks
where
you
can
learn
the
programming
language
exercise
by
exercise
by
exercise.
They
feature
a
ton
of
programming
languages.
52
of
them
there
they
are
here
is
the
old,
the
overall
logo
wall-
and
you
see
some
familiar
logos
here,
and
one
thing
that
I
was
interested
in
was
rust
down
there.
A
This
is
the
excess
home
which
I
can't
access
anymore,
because
I'm
logged
in
always-
and
this
is
how
it
looks
once
you
are
locked
in
so
this
is
me
about
15
years
ago,
and
this
is
the
one
track
that
I
have
joined
the
rust
track.
I
already
completed
32
exercises
and
for
me
it
was
a
really
good
way
to
get
get
familiar
with
the
programming
language.
A
A
It's
not
only
that,
but
there's
some
tests
to
it,
I'm
getting
to
that
in
a
bit
and
also
some
some
commands
on
how
to
run
them
with
the
programming
language
that
you
have
been
using.
This
is
so
the
exercises
are
somehow
similar
across
all
the
programming
languages
that
they
are,
but
they
have
been
adapted
and
refected
to
suit
the
needs
of
the
programming
language
that
you
are
currently
using.
Not
only
that
doubly
linked
lists
are
marked
hard,
but
also
some
some
hints
regarding
crates
that
you
can
fetch
on
cargo.
A
Also,
some
information
on
how
to
approach,
let's
say,
unicode
characters
with
graphemes
and
which
crates
to
use
for
that.
So
there's
lots
of
support
and
lots
of
information,
particularly
tied
to
rust.
Also,
there
was
one
example
where
I
had
to
work
with
lifetimes
or
custom
created
lifetimes
for
the
very
first
time.
There
was
an
explanation
on
what
to
do
and
where
to
find
information
and
some
guidance
on
that.
This
is
the
introduction.
A
One
thing
that
I
liked
particularly
about
that
is
that
I
had
to
download
the
whole
thing
so
there's
a
command
line
tool
called
exorcism.
I
installed
it
with
brew
back
in
the
day,
and
I
had
to
download
the
example.
There's
no,
no
online
editor,
even
though
it's
possible-
and
I
think,
they're
working
on
on
the
relaunch
of
exorcism,
where
you
can
use
an
online
editor,
but
I
found
it
particularly
nice
to
work
with
the
real
tools
on
my
hard
disk,
because
I
was
able
to
learn
the
tool
chain.
A
So,
of
course,
demos
and
exercises
and
learnings
are
always
great
if
you,
if
you
don't
have
to
worry
about
about
tooling,
but
in
my
particular
case
I
thought
I
want
to
get
around
how
to
use
cargo,
what
the
commands
are
there,
how
to
compile
them
to
to
work
with
rust
up,
etc.
So
this
is
also
why
I
think
that
the
very
first
exercise,
the
hello
world
doesn't
get
enough
recognition.
A
It's
not
about
getting
familiar
with
the
main
syntax
there.
It's
about
getting
to
know
the
tool
chain
getting
to
know
how
you
compile
stuff
getting
to
know
how
to
create
the
binary
that
you
can
actually
run.
So
once
you
are
downloading
exercises
from
exorcism,
you
get
the
whole
introduction
in
a
readme
file
again,
and
you
have
two
folders.
One
is
the
source
file
with
the
lib
rs.
A
So
this
is,
I
guess
the
this
is
the
etl
example
where
we
tried
to
to
get
a
list
that
looks
like
that
and
create
the
list
that
looks
entirely
different.
We
have
to
look
get
up
into
tests
in
a
couple
of
seconds,
so
there's
one
liprs
file
and
this
library's
file
is
usually
empty.
So
this
is
already
the
inflammation
implementation
that
I
added
and
there's
also
a
couple
of
tests,
and
the
very
first
test
is
active.
A
The
other
ones
are
usually
to
be
ignored
and
you
can
learn
a
lot
from
the
tests.
So
this
is
something
that
I
that
I
really
really
enjoyed
working
with
exorcism,
because
you
have
test
driven
development.
You
have
tests
that
are
optimized
for
the
programming
language
that
you
work
with.
This
is
also
what
I
think
very,
very
important,
and
then
you
can
learn
from
the
tests
how
you
want
to
develop
your
exercise.
What
I
usually
do
is
like
going
really
desperate
as
per
as
per
test.
A
Sometimes
my
algorithm
that
I
developed
was
good
enough
to
just
parcel
test,
and
then
it
just
needed
some
information,
some
some
adjustments
in
the
end
at
other
times,
I
had
to
activate
all
the
tests
to
get
around
what
I
wanted
to
do
or
what
I
wanted
to
achieve.
There
was
one
exercise
that
I
found
particularly
challenging,
which
are
which
was
scorecards
for
bowling,
because
never
ever
in
my
life
have
I
been
playing
bowling,
not
even
back
in
the
day
when
it
was
still
allowed
to
hang
out
together.
A
So
still,
I
managed
to
come
around
that
I
even
read
up
some
wikipedia
articles
there,
but
usually
the
tests
are
good
enough
and
all
that
you
need
to
find
your
way
around.
What
is
a
question
from
you
like?
What
is
the
challenge?
What
do
you
want
to
solve?
Also,
if
it's
for
me,
it's
also
great
to
to
have
tests
to
to
know
if
what
I'm
doing
was
actually
right
to
know.
If
my
exercise
has
been
successful,
there
are
also
sometimes
bonus
activities
where
you
can
say.
A
Okay
up
until
then,
it's
it's
just
like
the
challenge
level
describes
it
to
be,
but
from
there
on
there's
some
bonus
challenges
that
you
can
take
where
it
gets
a
little
bit
harder
and
they're,
also
very,
very
exciting.
The
fun
stuff
is
once
you
start
submitting
your
your
exercise.
You
can
submit
almost
like,
like
having
some
version
control
and
once
you
are
done,
and
once
you
think,
you're
really
ready,
you
click
the
submit
button
in
the
in
the
in
the
user
interface.
A
What
happens
then,
let's
go
to
one
that
I
already
solved.
This
is
the
grade
school
example
that
also
had
to
reformat
some
some
some
data.
So
I
got
data
in
one
way
and
had
to
format
it
in
another
way.
Here
was
the
test
suite
that
I
was
working
with,
and
this
was
my
solution,
so
I
even
had
to
implement
a
structs
there.
A
This
was
one
where
I
even
got
a
star
from
the
community,
because
what
happens
then?
Is
you
have
three
possibilities?
First,
I
could
request
mental
feedback,
so
there
are
real
actual
people
behind
exorcism
who
take
a
look
at
your
solution
and
give
you
feedback
on
that.
You
can
ask
them
questions
and
they
will
answer
disclaimer
not
in
time.
A
So
I
waited
about
three
weeks
for
my
answer
because
they
are
swarmed
with
with
students
who
want
to
have
feedback
and
what
I
know
it's
it's
just
labor
of
love,
it's
it's
not
something
they
could
actually
paid
for
they.
They
did
it
in
their
spare
time
and
tried
to
mention
meant
to
you
as
good
as
possible.
I
requested
one
once
feedback,
where
I
tried
to
to
create
a
prime
number
algorithm,
where
I
thought.
Okay,
there
must
be
a
much
more
idiomatic
way
to
do
so.
A
It
took
a
couple
of
times
a
couple
of
days
until
I
got
feedback,
but
the
feedback
was
very
valuable,
with
a
couple
of
links,
a
couple
of
solutions
that
I
could
look
into
to
get
inspired
or
get
more
feedback
to,
and
that
is
one
thing
that
actually
like
most,
which
is
few
community
solutions.
So
I
can
take
a
look
at
solutions.
Here's
my
style
look
at
that
about
solutions.
Everybody
else
did
so.
A
Usually
you
find
out
that
there
are
a
couple
of
people
that
you
that
are
doing
the
the
the
exercises
with
you
like
to
have
a
similar
progress.
I
guess
I
guess
this
person
I
peeked
into
into
their
results
a
couple
of
times.
You
can
open
them.
If
they
want
to
share
it,
you
can
you
can
read
their
solution,
get
inspired
and
if
they
have
some
some
common
states,
it's
always
very,
very
helpful.
So
what
I
started
doing
was
commenting
my
examples
as
well.
A
Try
to
give
some
feedback
try
to
give
a
comment
on
what
I
thought
about,
creating
my
solution
submitting
it,
and
hopefully
people
found
it
interesting.
So
there
is
the
possibility.
It's
not
it's
not
very
active,
but
there's
a
possibility
of
a
discussion
that's
going
on
and
that
is
happening
so
help
help
help
others
help
you
and
help
help
you
help
others.
A
I
guess
that's
the
mantra
of
this
particular
thing,
and
with
that
I
I
think
I
did
about
a
third
of
all
the
exercises
and
I
think
it
got
really
really
far
to
to
try
my
own
example
afterwards
and
to
try
to
work
on
some
actual
production
code.
This
is
why
I
also,
I
guess
I
didn't
try
another
exercise
for
for
the
last
30
days
or
so
well,
I'm
eager
to
to
dig
deeper
into
what's
offered
there,
and
for
that
I
think,
exorcism
helped
me
a
lot.
A
I
can
recommend
it
to
everybody
who
has
no
idea
how
to
start.
You
know
you
can
read
books,
you
can
watch
tutorials,
you
can
read
blog
articles,
which
I
do
a
lot
so
so
so
I
read
a
lot.
I
I
try
to
be
informed
on
what's
happening.
I
go
to
online
conferences.
Stefan
is
here
in
the
zoom
chat.
He
did
a
great
job
with
his
colleagues
for
for
rust,
fest.
Just
recently
I
enjoyed
watching
those
talks
a
lot.
A
I
still
had
no
clue
how
to
start-
and
this
helped
me
giving
me
very
mundane
very
generic
examples.
You
know
computer
science
101
the
stuff
that
you
learn
when
you
are
in
in
high
school,
when
you
are
at
university,
very
basic
examples
that
bring
you
closer
to
the
programming
language
again,
without
forcing
you
to
to
work
with
a
certain
domain
like
creating
a
web
service
like
creating
some
some
compiler
stuff,
it's
something
where
you
can
focus
on
learning
the
parts
of
the
programming
language
that
you
need
to
know
and
to
be
fair.
A
A
I
can
recommend
it
to
everybody
who
wants
to
get
started
that
doesn't
know
how
try
it
out
it's
free
after
all,
and
have
fun
with
it,
and
also
if
the
folks
here
aren't
able
to
give
you
feedback
in
time
check
out
our
discord.
You
find
me
there
in
the
random
channel,
asking
all
the
stupid
questions
but
being
very
happy
that
they
get
all
the
good
answers
from
a
wonderful
community.
So
thank
you
for
for
teaching
me
rust
to
the
folks
in
our
discord
channel
and
to
the
folks
at
exorcism
and
that's
my
lightning
talk.
B
A
A
Is
you
you
you
see
when
it's
idiomatic,
because
it
looks
nice
the
moment.
It's
not
idiomatic.
You
have
lots
of
asterisks
and
ampersands
in
there
and
you
think,
okay,
this.
This
might
not
be
not
be
the
way
the
way
to
use
it.
You
know
when
you
write
diameters
by
reading
other
people's
code,
and
this
is
where
my
code
got
a
lot
better.
So
every
time
I
had
a
broken
or
or
solution,
I
was
not
not
too
happy
with
I
peeked
into
the
solutions,
because
this
is
a
trick.
A
If
we
are
here,
you
know
those
are
here
are
the
community
solutions.
This
url
does
not
change,
so
there's
no
hash
behind
it
or
some
id.
If
you
know
what
the
name
of
your
of
your
exercise
is,
you
can
find
the
solutions,
while
you're
coding,
you
don't
have
to
submit
it,
and
this
was
something
that
I
picked
all
the
time.
A
So
I
already
knew
a
couple
of
couple
of
images
and
couple
of
nicknames
there
to
find
some
people
where
I
could
peek
into
their
solution
to
learn
idiomatic
rust,
but
they
don't
focus
on
idiomatic
rust
on
their
own.
What
they
do
is
once
you
get
into
the
hairy
stuff,
they
provide
you
with
enough
resources
to
read
up
on
that,
but
that
doesn't
happen
all
the
time.
B
A
Have
to
be
enrolled
in
the
course
to
view
it.
Let
me
just
try
it
out
by
opening
my
solution
for
grad
school
in
a
private
tab
where
I'm
not
looking
nope,
you
can
share
it
with
everyone,
that's
cool!
So
if
you
want
to
look
at
my
grad
school
solution,
write
down
the
rail
right
now,
I
think
this
could
later
on.