Step by Step solution about How to resolve the algorithm Order disjoint list items step by step in the Julia programming language

This source code defines a function called order_disjoint which takes two arrays as input and returns a new array that is the result of replacing the elements of the first array with the elements of the second array in the order specified by the second array.

The function first checks if the second array is empty, and if it is, it throws an error. Then, it creates a new array called rdis which will store the indices of the elements of the second array in the order they appear in the first array. The function then iterates over the elements of the second array, and for each element, it finds the first occurrence of that element in the first array. If the element is not found, the function throws an error. If the element is found, the function stores the index of the element in the rdis array.

Once all of the elements of the second array have been processed, the function sorts the rdis array in ascending order. Finally, the function creates a new array called p which is a copy of the first array, and then it replaces the elements of p at the indices specified by the rdis array with the elements of the second array. The function then returns the p array.

The function is tested by iterating over a list of test cases, each of which consists of two arrays. For each test case, the function calls the order_disjoint function and prints the result.

Here is an example of how the function works:

julia> testm = ["the", "cat", "sat", "on", "the", "mat"]
julia> testn = ["mat", "cat"]
julia> order_disjoint(testm, testn)
["mat", "cat", "sat", "on", "the", "mat"]

In this example, the order_disjoint function takes two arrays as input, testm and testn, and returns a new array which is the result of replacing the elements of testm with the elements of testn in the order specified by testn. The output is a new array which contains the elements "mat", "cat", "sat", "on", "the", and "mat".

function order_disjoint{T<:AbstractArray}(m::T, n::T)
    rlen = length(n)
    rdis = zeros(Int, rlen)
    for (i, e) in enumerate(n)
        j = findfirst(m, e)
        while j in rdis && j != 0
            j = findnext(m, e, j+1)
        end
        rdis[i] = j
    end
    if 0 in rdis
        throw(DomainError())
    end
    sort!(rdis)
    p = copy(m)
    p[rdis] = n
    return p
end


testm = {["the", "cat", "sat", "on", "the", "mat"],
         ["the", "cat", "sat", "on", "the", "mat"],
         ["A", "B", "C", "A", "B", "C", "A", "B", "C"],
         ["A", "B", "C", "A", "B", "D", "A", "B", "E"],
         ["A", "B"],
         ["A", "B"],
         ["A", "B", "B", "A"],
         }

testn = {["mat", "cat"],
         ["cat", "mat"],
         ["C", "A", "C", "A"],
         ["E", "A", "D", "A"],
         ["B"],
         ["B", "A"],
         ["B", "A"],
         }

for i in 1:length(testm)
    m = join(testm[i], " ")
    n = join(testn[i], " ")
    p = join(order_disjoint(testm[i], testn[i]), " ")
    println("    (", m, ", ", n, ") => ", p)
end