src/func.jl



function value_vec(vec_x::Union{Array{VariableRef,1}, VariableRef})
    if isa(vec_x, VariableRef)
        vec_value = value(vec_x)
    else
        vec_value = [value(vec_x[i]) for i = 1:length(vec_x)]
    end

    return vec_value
end


function dual_vec(vec_cons)
    return [dual(vec_cons[i]) for i = 1:length(vec_cons)]
end


@enum ColRow begin
   row = 1
   col = 2
end


function checkColVec(vec::Array{Int64,2}, str_name::String)
    if size(vec)[Int(col)] != 1
        throw("$str_name is not a column vector")
    end
end


function checkMatrixMatch(
        len::Float64, array::Array{Int64,2}, whi::ColRow,
        str_len::String, str_array::String
        )
    if size(array)[Int(whi)] != len
        throw("The $(str(whi)) of $str_array doesn't match the $str_len.")
    end
end


function checkListMatch(
        len::Float64, list::Array{Int64,1}, str_len::String, str_list::String,
        )
    if length(list_1) != length(list_2)
        throw("The length of list $str_list doesn't match the $str_len.")
    end
end


"""
Solution for Model
"""
mutable struct Sol
    obj::Float64
    vec_result_x::Array{Float64,2}
    vec_result_u::Array{Float64,2}
end


mutable struct SolMix
    obj::Float64
    vec_result_x::Array{Float64,2}
    vec_result_y::Array{Float64,2}
end