Use return value of the function in open()

Day_2/Day_2.jl

@@ -307,17 +307,16 @@ md"""
 
 # ╔═╡ 1e75c110-005c-494f-9569-5eca01cb0545
 begin
-	# Initialize an empty array of the type String
-	# If you just use `[]` without `String`, Julia initializes an empty array with the type `Any` because it can not know what the array will contain.
-	# We did already learn that array with the type `Any` are harmful for performance 🐢
-	lines = String[]
-	
 	# Open a file by specifying the path to the file and the mode in which it is opened with.
 	# The mode "r" stands for read-only. This means that we can only read but not change the content of the file.
 	# For more modes, check the documentation of `open` 📚️
-	open("resources/test.txt", "r") do io
+	# The returned value is stored in the variable before `open`
-		lines = readlines(io)
+	# In this case, the variable `lines` stores a vector of the file lines as strings
+	
+	lines = open("resources/test.txt", "r") do io
+		return readlines(io)
 	end
+	
 	# The file is automatically closed
 end
 

Day_4/Day_4.jl

@@ -0,0 +1,32 @@
+### A Pluto.jl notebook ###
+# v0.18.4
+
+using Markdown
+using InteractiveUtils
+
+# ╔═╡ 81b6211e-b065-11ec-0a86-375721c85b07
+
+
+# ╔═╡ 1fb7d9af-333e-44f2-b693-09ff97937d4c
+
+
+# ╔═╡ 00000000-0000-0000-0000-000000000001
+PLUTO_PROJECT_TOML_CONTENTS = """
+[deps]
+"""
+
+# ╔═╡ 00000000-0000-0000-0000-000000000002
+PLUTO_MANIFEST_TOML_CONTENTS = """
+# This file is machine-generated - editing it directly is not advised
+
+julia_version = "1.7.2"
+manifest_format = "2.0"
+
+[deps]
+"""
+
+# ╔═╡ Cell order:
+# ╠═81b6211e-b065-11ec-0a86-375721c85b07
+# ╠═1fb7d9af-333e-44f2-b693-09ff97937d4c
+# ╟─00000000-0000-0000-0000-000000000001
+# ╟─00000000-0000-0000-0000-000000000002

Day_4/Tasks_day_4.jl

@@ -0,0 +1,28 @@
+### A Pluto.jl notebook ###
+# v0.18.4
+
+using Markdown
+using InteractiveUtils
+
+# ╔═╡ 95f0a7c8-b065-11ec-0bd4-a9be6aca0c47
+
+
+# ╔═╡ 00000000-0000-0000-0000-000000000001
+PLUTO_PROJECT_TOML_CONTENTS = """
+[deps]
+"""
+
+# ╔═╡ 00000000-0000-0000-0000-000000000002
+PLUTO_MANIFEST_TOML_CONTENTS = """
+# This file is machine-generated - editing it directly is not advised
+
+julia_version = "1.7.2"
+manifest_format = "2.0"
+
+[deps]
+"""
+
+# ╔═╡ Cell order:
+# ╠═95f0a7c8-b065-11ec-0bd4-a9be6aca0c47
+# ╟─00000000-0000-0000-0000-000000000001
+# ╟─00000000-0000-0000-0000-000000000002