2023-03-31

.gitignore

@@ -0,0 +1 @@
+/.idea/**

src/array.jl

@@ -0,0 +1,26 @@
+#!/snap/bin/julia
+
+a = []
+println(typeof(a)) # Vector{Any}
+
+a = Int64[]
+println(typeof(a)) # Vector{Int64}
+
+a = Array{Int64, 1}()
+println(typeof(a)) # Vector{Int64}
+a = Vector{Int64}()
+println(typeof(a)) # Vector{Int64}
+
+a = zeros(5)
+println(a) # [0.0, 0.0, 0.0, 0.0, 0.0]
+
+a = ones(Int64, 5)
+println(a) # [1, 1, 1, 1, 1]
+
+a = [1;2;3]
+println(a) # [1,2,3]
+a = [1,2,3]
+println(a) # [1,2,3]
+
+a = [1 2 3]
+println(a) # [1 2 3]

src/array2.jl

@@ -0,0 +1,52 @@
+#!/snap/bin/julia
+
+a = [1, 2]
+b = [4, 5, 6]
+println(a) # [1,2]
+
+push!(a, 3)
+println(a)# [1,2,3]
+
+append!(a, b)
+println(a) # [1,2,3,4,5,6]
+
+c = vcat(a, b)
+println(a) # [1,2,3,4,5,6]
+println(b) # [4, 5, 6]
+println(c) # [1,2,3,4,5,6,4,5,6]
+
+x = pop!(a)
+println(a) # [1,2,3,4,5]
+println(x) # 6
+
+x = popfirst!(a)
+println(a) # [2,3,4,5]
+println(x) # 1
+
+deleteat!(a, 2)
+println(a) # [2,4,5]
+
+pushfirst!(a,0)
+println(a) # [0,2,4,5]
+
+c = a[end:-1:1]
+println(a)# [0,2,4,5]
+println(c)# [5,4,2,0]
+
+using Random # 셔플을 하려면 Random을 불러와야 한다.
+shuffle!(a)
+println(a)
+sort!(a)
+println(a)# [0,2,4,5]
+
+println(1 in a)# false
+println(2 in a) # true
+
+println(length(a)) # 4
+println(maximum(a)) # 5
+println(minimum(a)) # 0
+
+empty!(a)
+println(a) # Int64[]
+
+println(isempty(a)) # true

src/array3.jl

@@ -0,0 +1,19 @@
+#!/snap/bin/julia
+
+a = [[1,2,3] [4,5,6]] # 열 우선
+println(a)# [1 4; 2 5; 3 6]
+a = [1 4; 2 5; 3 6] # 행 우선
+
+a = zeros(2, 3) # 2x3 크기의 행렬
+println(a)# [0.0 0.0 0.0; 0.0 0.0 0.0]
+
+a = fill("hello", 2, 3)
+println(a)# ["hello" "hello" "hello"; "hello" "hello" "hello"]
+
+a = [[1,2,3] [4,5,6]]
+
+println(size(a))# (3,2)
+println(ndims(a))# 2
+
+println(a')# [1 2 3; 4 5 6]
+println(permutedims(a))

src/dictionary.jl

@@ -0,0 +1,20 @@
+#!/snap/bin/julia
+
+d = Dict("name"=>"Charlie", "age"=>13)
+
+d["gender"] = "male"
+
+for (k,v) in d
+    println("$k is $v")
+end
+
+println(d["name"])
+println(get(d, "name", "noname"))
+
+for k in keys(d)
+    println(k)
+end
+
+println(haskey(d, "job")) # false
+
+println(in("name"=>"Charlie", d)) # true

src/function.jl

@@ -0,0 +1,16 @@
+#!/snap/bin/julia
+
+name = "World"
+println("Hello, $name.")
+
+
+
+for i = 1:2, j = 3:4
+    println((i, j))
+end
+
+try
+    sqrt("ten")
+catch e
+    println("You should have entered a numeric value")
+end

src/hello.jl

@@ -1,4 +1,16 @@
 #!/snap/bin/julia
 
 name = "World"
-println("Hello, $name.")
+println("Hello, $name.")
+
+
+
+for i = 1:2, j = 3:4
+    println((i, j))
+end
+
+try
+    sqrt("ten")
+catch e
+    println("You should have entered a numeric value")
+end

src/numbers.jl

@@ -1,10 +1,10 @@
 #!/snap/bin/julia
 
 x = 11
-println(typeof(x))
+println(typeof(x)) # Int64
 
 y = 11.8
-println(typeof(y))
+println(typeof(y)) # Float64
 
 println(Sys.WORD_SIZE) # 32 or 64 ...
 
@@ -23,4 +23,15 @@ println(arr .^ 2) # [1,4,9]
 println(sin.(arr)) 
 
 c = 2//3 + 1
-println(c) # 5//3
+println(c) # 5//3
+
+
+a = 1
+b = 2
+Σ = a + b
+
+println(Σ)
+
+
+println(rand()) # 0~1사이의 부동 소수
+println(rand(1:6)) # 범위 내의 정수

src/set.jl

@@ -0,0 +1,16 @@
+#!/snap/bin/julia
+
+s = Set()
+
+s = Set([1,2,3,2,4,3,7,8])
+
+println(s) # Set([4, 7, 2, 8, 3, 1])
+
+set1 = Set([1,2,3])
+set2 = Set([4,2,3])
+
+println(intersect(set1, set2)) # Set([2, 3])
+println(union(set1, set2)) # Set([4, 2, 3, 1])
+println(setdiff(set1, set2)) # Set([1])
+
+

src/string.jl

@@ -0,0 +1,21 @@
+#!/snap/bin/julia
+
+str = "Hello, World!"
+
+println(str[1]) # 'H'
+println(str[end]) # '!'
+println(str[end-2]) # 'l'
+println(str[3:6]) # 'llo,'
+
+name = "Charlie"
+hello = string("Hello, ", name, "!\n")
+println(hello)
+
+hello2 = "Hello, " *  name * "!\n"
+println(hello2)
+
+hello3 = "Hello, $name.\n"
+println(hello3)
+
+hello3 = "Hello, $(name)!\n"
+println(hello3)

src/string2.jl

@@ -0,0 +1,22 @@
+#!/snap/bin/julia
+
+str = "Hello, World!"
+
+println(firstindex(str)) # 1
+println(lastindex(str)) # 13
+println(length(str)) # 13
+
+substr = SubString(str, 3,6)
+println(substr) # llo,
+
+s = repeat("A", 4)
+println(s)
+
+s = split(str, ",")
+println(s)
+
+s = replace(str, ("l" => "L"))
+println(s)
+
+s = join(["A", "B", "C"], ", ")
+println(s)

src/tuple.jl

@@ -0,0 +1,11 @@
+#!/snap/bin/julia
+
+a = (1,2,3)
+var1, var2 = a
+
+
+println(var1)# 1
+println(var2)# 2
+
+a = (x=1, y=2)
+println(a.x)# 1