Add push!, append! and pop!

Day_1/Day_1.jl

@@ -24,6 +24,8 @@ using Measurements, Unitful
 using LinearAlgebra
 
 # ╔═╡ d1a4ef8b-8e7d-4d34-80d8-cee195e237ae
+# Oh, no, you found my secret! 😱
+# Don't change this hidden cell!
 begin
 	using PlutoUI
 	
@@ -831,6 +833,43 @@ begin
 	second_vector
 end
 
+# ╔═╡ 1fd6fdd3-82a0-480e-9db6-e657536da63f
+# Add elements to a vector
+begin
+	growing_vector = []
+	push!(growing_vector, 42)
+	push!(growing_vector, 33)
+	growing_vector
+end
+
+# ╔═╡ ace6fd59-ccb8-4318-85ce-966b04c4ce53
+# Append elements of one vector to another one
+begin
+	growing_vector2 = [1, 2]
+	vector_to_append = [22, 33, 44]
+	append!(growing_vector2, vector_to_append)
+	growing_vector2
+end
+
+# ╔═╡ b7bb3e82-a2ee-4356-8c7b-0db664adcbe0
+# Remove elements
+begin
+	shrinking_vector = [-1, -2, -2, 55, 123, 44, 52, 98, -3, -112]
+	@show shrinking_vector
+	
+	# Remove the last element
+	pop!(shrinking_vector)
+	@show shrinking_vector
+	
+	# Remove the first element
+	popfirst!(shrinking_vector)
+	@show shrinking_vector
+	
+	# Remove at a given index
+	popat!(shrinking_vector, 3)
+	@show shrinking_vector
+end
+
 # ╔═╡ 027313d6-c247-43e9-872b-c3f0fe71b733
 third_vector = [1, 2, 3]
 
@@ -1483,6 +1522,9 @@ uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"
 # ╠═628852dc-16e5-4a03-93a9-be209b1e8fb4
 # ╟─3ea54f0d-2aa5-47a3-bbc3-92023a56b834
 # ╠═e9e117af-1194-4d64-94a8-3e9fd51498aa
+# ╠═1fd6fdd3-82a0-480e-9db6-e657536da63f
+# ╠═ace6fd59-ccb8-4318-85ce-966b04c4ce53
+# ╠═b7bb3e82-a2ee-4356-8c7b-0db664adcbe0
 # ╠═027313d6-c247-43e9-872b-c3f0fe71b733
 # ╠═e77e7ceb-31e3-4231-9923-f62b1382a2d1
 # ╠═65d3ddc2-36ed-4126-9211-e838ffc0d859