witt3rd · October 13, 2020 11:49
diff --git a/pluto-test.jl b/pluto-test.jl
 ### A Pluto.jl notebook ###
 # v0.12.3

 using Markdown
 using InteractiveUtils

 # This Pluto notebook uses @bind for interactivity. When running this notebook outside of Pluto, the following 'mock version' of @bind gives bound variables a default value (instead of an error).
 macro bind(def, element)
    quote
        local el = $(esc(element))
        global $(esc(def)) = Core.applicable(Base.get, el) ? Base.get(el) : missing
        el
    end
 end

 # ╔═╡ b129ba7c-953a-11ea-3379-17adae34924c
 md"# _Welcome to Pluto!_

 Pluto is a programming environment for _Julia_, designed to be **interactive** and **helpful**. 

 In this introduction, we will go through the basics of using Pluto. To make it interesting, this notebook does something special: it **changes while you work on it**. Computer magic ✨"

 # ╔═╡ 4d88b926-9543-11ea-293a-1379b1b5ae64
 md"## Cats
 Let's say you're like my grandma, and you have a lot of cats. Our story will be about them."

 # ╔═╡ 3e8e381e-953f-11ea-3d3e-71d0fea52560
 cat = "Ks*;lj"

 # ╔═╡ aeb3a6bc-9540-11ea-0b8f-6d37412bfe68
 if cat == "Ks*;lj"
 	md"Oh no! Someone messed with my pretty introduction. Change the code above to give our cat a proper name!"
 else
 	HTML("""<p><b>Well done, your cat is called $cat now.</b> This text gets updated every time you change the name. To see how the magic works, click on the <img src="https://cdn.jsdelivr.net/gh/ionic-team/[email protected]/src/svg/eye-outline.svg" style="width: 1em; height: 1em; margin-bottom: -.2em;"> to the left of this text.</p>""")
 end

 # ╔═╡ 611c28fa-9542-11ea-1751-fbdedcfb7690
 html"""<p>To edit any code, just click on it. When you're done programming, press the <img src="https://cdn.jsdelivr.net/gh/ionic-team/[email protected]/src/svg/caret-forward-circle-outline.svg" style="width: 1em; height: 1em; margin-bottom: -.2em;"> in the lower-right corned of a cell to run the code. You can also use `Shift+Enter` if you are in a hurry.</p>"""

 # ╔═╡ 6f7eecec-9543-11ea-1284-dd52fce3ecca
 md"I feel like our cat needs a friend. Let's call them $(friend)."

 # ╔═╡ a1a20314-9543-11ea-17de-0b658da18992
 if !@isdefined friend
 	md"Uh oh, what is this? I forgot to add a cell defining our friend. Can you do it for me?"
 else
 	md"**Well done!** $cat and $friend are both happy with your performance."
 end

 # ╔═╡ f112b662-9543-11ea-3dcb-2906a99b2188
 html"""<p>A cell is a container for code & output. To add one, click on the <img src="https://cdn.jsdelivr.net/gh/ionic-team/[email protected]/src/svg/add-outline.svg" style="width: 1em; height: 1em; margin-bottom: -.2em;"> above or below another cell. You can do it wherever you like. After you're done writing code in your cell, remember to run it!</p>"""

 # ╔═╡ e0642f42-9545-11ea-14ee-fde52cb54ccc
 md"## Feeding neighbors
 Our cats have some neighbors. Let's involve them in the story too!"

 # ╔═╡ 3653b1ac-9546-11ea-2a44-ddd3054636fe
 neighbors = [cat, friend, "Smerfetka", "Latte"]

 # ╔═╡ 19ff8d36-9547-11ea-0e08-e5cdd8338673
 md"Now, if you're like my grandma, you're feeding the entire neigborhood by yourself. Let's see how many cans of cat food you need to prepare."

 # ╔═╡ 270ac49e-9549-11ea-3ffd-71ddaee9f134
 md"But what does `confusing_function` do? If you ever need help, click on 📚 **Live docs** in the lower right, and then place your cursor on the code you need help with. 

 If you don't see it, then your screen is too small! Maybe you need to zoom out?"

 # ╔═╡ 745a4584-954a-11ea-028e-59011f268ec6
 cans_in_stock = "🥫🥫🥫🥫"

 # ╔═╡ 55ad7422-954e-11ea-0a33-a3b03febb56e
 if @isdefined cans_in_stock
 	md"Actually, I have a hunch there will be another cat coming. Uncomment the code below (remove the #) to add one more can. Remember to run it after making the change!"
 else
 	md"**Whoopsie!** Because Pluto figures out execution order for you, it doesn't really make sense to assign to the same variable twice. A smarter way to plan ahead is to write `cans_in_stock = consumption` — Pluto will take care of updating everything."
 end

 # ╔═╡ eac62fea-954e-11ea-2768-39ce6f4059ab
 # cans_in_stock = "🥫🥫🥫🥫🥫"

 # ╔═╡ 6c8e2108-9550-11ea-014d-235770ed4771
 md"## Saving cats and notebooks
 Alright, we have a neighborhood full of well-fed cats. But oh no, here comes..."

 # ╔═╡ 9e89fc9a-9550-11ea-14b4-7f0e96225ec0
 scary_dog = "Piesio"

 # ╔═╡ bdd5d268-9550-11ea-1046-31efedc36872
 if @isdefined scary_dog
 	md" $scary_dog is terrorizing the neighborhood! We must do something about it!"
 else
 	md"You saved the neighborhood! Referencing `scary_dog` leads to an `UndefVarError`, as if it never even existed."
 end

 # ╔═╡ 36cd006a-9551-11ea-3c0c-df8b7f2843c1
 HTML("""<p>To delete a cell like the one defining $scary_dog, click on the <img src="https://cdn.jsdelivr.net/gh/ionic-team/[email protected]/src/svg/close-circle-outline.svg" style="width: 1em; height: 1em; margin-bottom: -.2em;"> on the right of its code.</p>""")

 # ╔═╡ fb4e471c-9551-11ea-1ab5-41bbd5de76b8
 md"Speaking of saving, this notebook is autosaved whenever you change something. The default location for new notebooks is $(joinpath(first(DEPOT_PATH), "pluto_notebooks")), you can find it using your file explorer. To change the name or the directory of a notebook, scroll to the top - you enter the notebook's path next to the Pluto logo."

 # ╔═╡ 9d3af596-9554-11ea-21bd-bf427c91c424
 md"## ⚡ Pluto power ⚡
 Oof, that dog situation was intense. Let's give our cats superpowers to make sure it never happens again!"

 # ╔═╡ 3150bf1a-9555-11ea-306f-0fd4d9229a51
 md"Remember learning HTML in junior high? Now you can use it for something! Pluto lets you `@bind` variables to HTML elements. As always, every time you change something, Pluto knows what to update!"

 # ╔═╡ f2c79746-9554-11ea-39ca-298fd09248ad
 @bind power_level html"<input type='range'>"

 # ╔═╡ 0b094cea-9556-11ea-268e-0d270fd04d56
 md"The power level is $power_level, but we should do more than just say it - let's equip our cats with $power_level emoji!"

 # ╔═╡ 1908f9f2-9557-11ea-2abd-dd52f8d776f4
 power_emoji = "⚡"
 power = repeat(power_emoji, power_level)

 # ╔═╡ 784b1774-9557-11ea-315e-d1ea277ce0fd
 if !@isdefined power
 	md"Uh oh! Pluto doesn't support multiple expressions per cell. This is a conscious choice - this restriction helps you write less buggy code once you get used to it. To fix the code, you can either split the above cell, or wrap it in a `begin ... end` block. Both work."
 else
 	md"**Well done!** Your cats have powers now."
 end

 # ╔═╡ 5edadcd2-9554-11ea-1714-b5b7692c4797
 html"""<p>We're almost done! It's time to share your amazing story. Scroll to the top of the notebook, and click on <img src="https://cdn.jsdelivr.net/gh/ionic-team/[email protected]/src/svg/shapes-outline.svg" style="width: 1em; height: 1em; margin-bottom: -.2em;"> to see the export options - or you can always share this notebook's save file. (The file is pure Julia, by the way, and it's runnable! You'll learn more about this in the advanced introduction.)</p>"""

 # ╔═╡ 4634c856-9553-11ea-008d-3539195970ea
 md"## Final notes"

 # ╔═╡ 4d0ebb46-9553-11ea-3431-2d203f594815
 md"If anything about this introduction left you confused, something doesn't work, or you have a cool new idea - don't hesitate to contact us! You can do it right from this screen, using the `Instant feedback` form in the bottom right."

 # ╔═╡ d736e096-9553-11ea-3ba5-277afde1afe7
 md"Also, if you were wondering where `confusing_function` came from, here you go! Remember that you, too, can place code wherever you like."

 # ╔═╡ 7366f1b6-954c-11ea-3f68-b12444c902c3
 """
 confusing_function(text::String, array::Array)

 Repeats the `text` as many times as there are elements in `array`.
 """
 confusing_function(text::String, array::Array) = repeat(text, length(array))

 # ╔═╡ a4a60262-9547-11ea-3a81-5bf7f9ee5d16
 consumption = confusing_function("🥫", neighbors)

 # ╔═╡ e11e1660-9549-11ea-22f6-8bb53dc045fe
 md"Now we know to prepare $(length(consumption)) cans. Let's stock up!"

 # ╔═╡ f27f90c2-954f-11ea-3f93-17acb2ce4280
 md"We have $(length(cans_in_stock)) cans of cat food, and our cats need $(length(consumption)). Try adding another cat to the neighborhood to see what changes!"

 # ╔═╡ 1deaaf36-9554-11ea-3dae-85851f73dbc6
 md"**Have fun using Pluto!**

 _~ Fons van der Plas & Nicholas Bochenski_"

 # ╔═╡ Cell order:
 # ╟─b129ba7c-953a-11ea-3379-17adae34924c
 # ╟─4d88b926-9543-11ea-293a-1379b1b5ae64
 # ╠═3e8e381e-953f-11ea-3d3e-71d0fea52560
 # ╟─aeb3a6bc-9540-11ea-0b8f-6d37412bfe68
 # ╟─611c28fa-9542-11ea-1751-fbdedcfb7690
 # ╠═6f7eecec-9543-11ea-1284-dd52fce3ecca
 # ╟─a1a20314-9543-11ea-17de-0b658da18992
 # ╟─f112b662-9543-11ea-3dcb-2906a99b2188
 # ╟─e0642f42-9545-11ea-14ee-fde52cb54ccc
 # ╠═3653b1ac-9546-11ea-2a44-ddd3054636fe
 # ╟─19ff8d36-9547-11ea-0e08-e5cdd8338673
 # ╠═a4a60262-9547-11ea-3a81-5bf7f9ee5d16
 # ╟─270ac49e-9549-11ea-3ffd-71ddaee9f134
 # ╟─e11e1660-9549-11ea-22f6-8bb53dc045fe
 # ╠═745a4584-954a-11ea-028e-59011f268ec6
 # ╟─55ad7422-954e-11ea-0a33-a3b03febb56e
 # ╠═eac62fea-954e-11ea-2768-39ce6f4059ab
 # ╟─f27f90c2-954f-11ea-3f93-17acb2ce4280
 # ╟─6c8e2108-9550-11ea-014d-235770ed4771
 # ╠═9e89fc9a-9550-11ea-14b4-7f0e96225ec0
 # ╟─bdd5d268-9550-11ea-1046-31efedc36872
 # ╟─36cd006a-9551-11ea-3c0c-df8b7f2843c1
 # ╟─fb4e471c-9551-11ea-1ab5-41bbd5de76b8
 # ╟─9d3af596-9554-11ea-21bd-bf427c91c424
 # ╟─3150bf1a-9555-11ea-306f-0fd4d9229a51
 # ╠═f2c79746-9554-11ea-39ca-298fd09248ad
 # ╟─0b094cea-9556-11ea-268e-0d270fd04d56
 # ╠═1908f9f2-9557-11ea-2abd-dd52f8d776f4
 # ╟─784b1774-9557-11ea-315e-d1ea277ce0fd
 # ╟─5edadcd2-9554-11ea-1714-b5b7692c4797
 # ╟─4634c856-9553-11ea-008d-3539195970ea
 # ╟─4d0ebb46-9553-11ea-3431-2d203f594815
 # ╟─d736e096-9553-11ea-3ba5-277afde1afe7
 # ╟─7366f1b6-954c-11ea-3f68-b12444c902c3
 # ╟─1deaaf36-9554-11ea-3dae-85851f73dbc6
	### A Pluto.jl notebook ###
	# v0.12.3

	using Markdown
	using InteractiveUtils

	# This Pluto notebook uses @bind for interactivity. When running this notebook outside of Pluto, the following 'mock version' of @bind gives bound variables a default value (instead of an error).
	macro bind(def, element)
	quote
	local el = $(esc(element))
	global $(esc(def)) = Core.applicable(Base.get, el) ? Base.get(el) : missing
	el
	end
	end

	# ╔═╡ b129ba7c-953a-11ea-3379-17adae34924c
	md"# _Welcome to Pluto!_

	Pluto is a programming environment for _Julia_, designed to be interactive and helpful.

	In this introduction, we will go through the basics of using Pluto. To make it interesting, this notebook does something special: it changes while you work on it. Computer magic ✨"

	# ╔═╡ 4d88b926-9543-11ea-293a-1379b1b5ae64
	md"## Cats
	Let's say you're like my grandma, and you have a lot of cats. Our story will be about them."

	# ╔═╡ 3e8e381e-953f-11ea-3d3e-71d0fea52560
	cat = "Ks*;lj"

	# ╔═╡ aeb3a6bc-9540-11ea-0b8f-6d37412bfe68
	if cat == "Ks*;lj"
	md"Oh no! Someone messed with my pretty introduction. Change the code above to give our cat a proper name!"
	else
	HTML("""<p><b>Well done, your cat is called $cat now.</b> This text gets updated every time you change the name. To see how the magic works, click on the <img src="https://cdn.jsdelivr.net/gh/ionic-team/[email protected]/src/svg/eye-outline.svg" style="width: 1em; height: 1em; margin-bottom: -.2em;"> to the left of this text.</p>""")
	end

	# ╔═╡ 611c28fa-9542-11ea-1751-fbdedcfb7690
	html"""<p>To edit any code, just click on it. When you're done programming, press the <img src="https://cdn.jsdelivr.net/gh/ionic-team/[email protected]/src/svg/caret-forward-circle-outline.svg" style="width: 1em; height: 1em; margin-bottom: -.2em;"> in the lower-right corned of a cell to run the code. You can also use `Shift+Enter` if you are in a hurry.</p>"""

	# ╔═╡ 6f7eecec-9543-11ea-1284-dd52fce3ecca
	md"I feel like our cat needs a friend. Let's call them $(friend)."

	# ╔═╡ a1a20314-9543-11ea-17de-0b658da18992
	if !@isdefined friend
	md"Uh oh, what is this? I forgot to add a cell defining our friend. Can you do it for me?"
	else
	md"Well done! $cat and $friend are both happy with your performance."
	end

	# ╔═╡ f112b662-9543-11ea-3dcb-2906a99b2188
	html"""<p>A cell is a container for code & output. To add one, click on the <img src="https://cdn.jsdelivr.net/gh/ionic-team/[email protected]/src/svg/add-outline.svg" style="width: 1em; height: 1em; margin-bottom: -.2em;"> above or below another cell. You can do it wherever you like. After you're done writing code in your cell, remember to run it!</p>"""

	# ╔═╡ e0642f42-9545-11ea-14ee-fde52cb54ccc
	md"## Feeding neighbors
	Our cats have some neighbors. Let's involve them in the story too!"

	# ╔═╡ 3653b1ac-9546-11ea-2a44-ddd3054636fe
	neighbors = [cat, friend, "Smerfetka", "Latte"]

	# ╔═╡ 19ff8d36-9547-11ea-0e08-e5cdd8338673
	md"Now, if you're like my grandma, you're feeding the entire neigborhood by yourself. Let's see how many cans of cat food you need to prepare."

	# ╔═╡ 270ac49e-9549-11ea-3ffd-71ddaee9f134
	md"But what does `confusing_function` do? If you ever need help, click on 📚 Live docs in the lower right, and then place your cursor on the code you need help with.

	If you don't see it, then your screen is too small! Maybe you need to zoom out?"

	# ╔═╡ 745a4584-954a-11ea-028e-59011f268ec6
	cans_in_stock = "🥫🥫🥫🥫"

	# ╔═╡ 55ad7422-954e-11ea-0a33-a3b03febb56e
	if @isdefined cans_in_stock
	md"Actually, I have a hunch there will be another cat coming. Uncomment the code below (remove the #) to add one more can. Remember to run it after making the change!"
	else
	md"Whoopsie! Because Pluto figures out execution order for you, it doesn't really make sense to assign to the same variable twice. A smarter way to plan ahead is to write `cans_in_stock = consumption` — Pluto will take care of updating everything."
	end

	# ╔═╡ eac62fea-954e-11ea-2768-39ce6f4059ab
	# cans_in_stock = "🥫🥫🥫🥫🥫"

	# ╔═╡ 6c8e2108-9550-11ea-014d-235770ed4771
	md"## Saving cats and notebooks
	Alright, we have a neighborhood full of well-fed cats. But oh no, here comes..."

	# ╔═╡ 9e89fc9a-9550-11ea-14b4-7f0e96225ec0
	scary_dog = "Piesio"

	# ╔═╡ bdd5d268-9550-11ea-1046-31efedc36872
	if @isdefined scary_dog
	md" $scary_dog is terrorizing the neighborhood! We must do something about it!"
	else
	md"You saved the neighborhood! Referencing `scary_dog` leads to an `UndefVarError`, as if it never even existed."
	end

	# ╔═╡ 36cd006a-9551-11ea-3c0c-df8b7f2843c1
	HTML("""<p>To delete a cell like the one defining $scary_dog, click on the <img src="https://cdn.jsdelivr.net/gh/ionic-team/[email protected]/src/svg/close-circle-outline.svg" style="width: 1em; height: 1em; margin-bottom: -.2em;"> on the right of its code.</p>""")

	# ╔═╡ fb4e471c-9551-11ea-1ab5-41bbd5de76b8
	md"Speaking of saving, this notebook is autosaved whenever you change something. The default location for new notebooks is $(joinpath(first(DEPOT_PATH), "pluto_notebooks")), you can find it using your file explorer. To change the name or the directory of a notebook, scroll to the top - you enter the notebook's path next to the Pluto logo."

	# ╔═╡ 9d3af596-9554-11ea-21bd-bf427c91c424
	md"## ⚡ Pluto power ⚡
	Oof, that dog situation was intense. Let's give our cats superpowers to make sure it never happens again!"

	# ╔═╡ 3150bf1a-9555-11ea-306f-0fd4d9229a51
	md"Remember learning HTML in junior high? Now you can use it for something! Pluto lets you `@bind` variables to HTML elements. As always, every time you change something, Pluto knows what to update!"

	# ╔═╡ f2c79746-9554-11ea-39ca-298fd09248ad
	@bind power_level html"<input type='range'>"

	# ╔═╡ 0b094cea-9556-11ea-268e-0d270fd04d56
	md"The power level is $power_level, but we should do more than just say it - let's equip our cats with $power_level emoji!"

	# ╔═╡ 1908f9f2-9557-11ea-2abd-dd52f8d776f4
	power_emoji = "⚡"
	power = repeat(power_emoji, power_level)

	# ╔═╡ 784b1774-9557-11ea-315e-d1ea277ce0fd
	if !@isdefined power
	md"Uh oh! Pluto doesn't support multiple expressions per cell. This is a conscious choice - this restriction helps you write less buggy code once you get used to it. To fix the code, you can either split the above cell, or wrap it in a `begin ... end` block. Both work."
	else
	md"Well done! Your cats have powers now."
	end

	# ╔═╡ 5edadcd2-9554-11ea-1714-b5b7692c4797
	html"""<p>We're almost done! It's time to share your amazing story. Scroll to the top of the notebook, and click on <img src="https://cdn.jsdelivr.net/gh/ionic-team/[email protected]/src/svg/shapes-outline.svg" style="width: 1em; height: 1em; margin-bottom: -.2em;"> to see the export options - or you can always share this notebook's save file. (The file is pure Julia, by the way, and it's runnable! You'll learn more about this in the advanced introduction.)</p>"""

	# ╔═╡ 4634c856-9553-11ea-008d-3539195970ea
	md"## Final notes"

	# ╔═╡ 4d0ebb46-9553-11ea-3431-2d203f594815
	md"If anything about this introduction left you confused, something doesn't work, or you have a cool new idea - don't hesitate to contact us! You can do it right from this screen, using the `Instant feedback` form in the bottom right."

	# ╔═╡ d736e096-9553-11ea-3ba5-277afde1afe7
	md"Also, if you were wondering where `confusing_function` came from, here you go! Remember that you, too, can place code wherever you like."

	# ╔═╡ 7366f1b6-954c-11ea-3f68-b12444c902c3
	"""
	confusing_function(text::String, array::Array)

	Repeats the `text` as many times as there are elements in `array`.
	"""
	confusing_function(text::String, array::Array) = repeat(text, length(array))

	# ╔═╡ a4a60262-9547-11ea-3a81-5bf7f9ee5d16
	consumption = confusing_function("🥫", neighbors)

	# ╔═╡ e11e1660-9549-11ea-22f6-8bb53dc045fe
	md"Now we know to prepare $(length(consumption)) cans. Let's stock up!"

	# ╔═╡ f27f90c2-954f-11ea-3f93-17acb2ce4280
	md"We have $(length(cans_in_stock)) cans of cat food, and our cats need $(length(consumption)). Try adding another cat to the neighborhood to see what changes!"

	# ╔═╡ 1deaaf36-9554-11ea-3dae-85851f73dbc6
	md"Have fun using Pluto!

	_~ Fons van der Plas & Nicholas Bochenski_"

	# ╔═╡ Cell order:
	# ╟─b129ba7c-953a-11ea-3379-17adae34924c
	# ╟─4d88b926-9543-11ea-293a-1379b1b5ae64
	# ╠═3e8e381e-953f-11ea-3d3e-71d0fea52560
	# ╟─aeb3a6bc-9540-11ea-0b8f-6d37412bfe68
	# ╟─611c28fa-9542-11ea-1751-fbdedcfb7690
	# ╠═6f7eecec-9543-11ea-1284-dd52fce3ecca
	# ╟─a1a20314-9543-11ea-17de-0b658da18992
	# ╟─f112b662-9543-11ea-3dcb-2906a99b2188
	# ╟─e0642f42-9545-11ea-14ee-fde52cb54ccc
	# ╠═3653b1ac-9546-11ea-2a44-ddd3054636fe
	# ╟─19ff8d36-9547-11ea-0e08-e5cdd8338673
	# ╠═a4a60262-9547-11ea-3a81-5bf7f9ee5d16
	# ╟─270ac49e-9549-11ea-3ffd-71ddaee9f134
	# ╟─e11e1660-9549-11ea-22f6-8bb53dc045fe
	# ╠═745a4584-954a-11ea-028e-59011f268ec6
	# ╟─55ad7422-954e-11ea-0a33-a3b03febb56e
	# ╠═eac62fea-954e-11ea-2768-39ce6f4059ab
	# ╟─f27f90c2-954f-11ea-3f93-17acb2ce4280
	# ╟─6c8e2108-9550-11ea-014d-235770ed4771
	# ╠═9e89fc9a-9550-11ea-14b4-7f0e96225ec0
	# ╟─bdd5d268-9550-11ea-1046-31efedc36872
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