June 2018 Update

Task/Create-a-two-dimensional-array-at-runtime/Julia/create-a-two-dimensional-array-at-runtime.julia

@@ -1,38 +1,16 @@
-julia> "Inspired by Python's `input` function."
-       function input(prompt::AbstractString="")
-           print(prompt)
-           chomp(readline())
-       end
-input (generic function with 2 methods)
+function input(prompt::AbstractString)
+    print(prompt)
+    return readline()
+end
 
-julia> n = parse(Int, input("Upper bound for dimension 1: "))    # parse as `Int`
-Upper bound for dimension 1: 5
-5
+n = input("Upper bound for dimension 1: ") |>
+    x -> parse(Int, x)
+m = input("Upper bound for dimension 2: ") |>
+    x -> parse(Int, x)
 
-julia> m = parse(Int, input("Upper bound for dimension 2: "))
-Upper bound for dimension 2: 5
-5
-
-julia> x = rand(n, m)    # create an n·m random matrix
-5x5 Array{Float64,2}:
- 0.80217    0.422318  0.594049   0.45547   0.208822
- 0.0533981  0.304858  0.0276755  0.797732  0.828796
- 0.522506   0.563856  0.216759   0.865961  0.034306
- 0.792363   0.815744  0.868697   0.42509   0.588946
- 0.112034   0.539611  0.674581   0.508299  0.939373
-
-julia> x[3, 3]    # overloads `getindex` generic function
-0.21675944652281487
-
-julia> x[3, 3] = 5    # overloads `setindex!` generic function
-5
-
-julia> x::Matirx    # `Matrix{T}` is an alias for `Array{T, 2}`
-5x5 Array{Float64,2}:
- 0.80217    0.422318  0.594049   0.45547   0.208822
- 0.0533981  0.304858  0.0276755  0.797732  0.828796
- 0.522506   0.563856  5.0        0.865961  0.034306
- 0.792363   0.815744  0.868697   0.42509   0.588946
- 0.112034   0.539611  0.674581   0.508299  0.939373
-
-julia> x = 0; gc()    # Julia has no `del` command, rebind `x` and call the garbage collector
+x = rand(n, m)
+display(x)
+x[3, 3]         # overloads `getindex` generic function
+x[3, 3] = 5.0   # overloads `setindex!` generic function
+x::Matrix # `Matrix{T}` is an alias for `Array{T, 2}`
+x = 0; gc() # Julia has no `del` command, rebind `x` and call the garbage collector