Question

Given a list of string comprised of a name and a roman numeral, sort the list first by name then roman numeral decimal value

Answer 1

Sorting a list of strings with names and Roman numerals requires comparing by alphabetical order and converting the Roman numerals to decimal values. Using a custom sorting function, the list can be ordered first by name, then by the numerical value of the Roman numeral.

Step-by-step explanation:

To solve the problem of sorting a list of strings with both names and Roman numerals, we need to consider two factors: the alphabetical order of the names and the numerical value of the Roman numerals. To sort by name, we compare the alphabetical order of the strings as we would with any sort. However, for the Roman numerals, we need to convert them to their decimal value for proper comparison since the alphabetic sort would not correctly order the numeric values VIII, IX, III, etc.

To perform this sort in a programming context, we would write a custom comparison function or use a key extractor to handle the conversion of Roman numerals to decimal numbers during the sort operation. For example, using a programming language like Python, we could use the sorted function with a custom key that parses the Roman numeral.

A step-by-step example:

1. Split each string into the name and Roman numeral components.
2. Convert the Roman numeral to its decimal value.
3. Sort the list of tuples (name, number) by the name, and then by the Roman numeral's decimal value.

The resulting sorted list will be ordered first by the name in alphabetical order and then by the numerical value of the associated Roman numerals.

Answer 2

The python code for the list of string is shown below

def roman_to_decimal(roman):

roman_numerals = {'I': 1, 'V': 5, 'X': 10, 'L': 50}

decimal = 0

prev_value = 0

for numeral in reversed(roman):

value = roman_numerals[numeral]

if value < prev_value:

decimal -= value

else:

decimal += value

prev_value = value

return decimal

def custom_sort(name_with_roman):

name, roman = name_with_roman.split()

return (name, roman_to_decimal(roman))

def sort_names(names):

sorted_names = sorted(names, key=custom_sort)

return sorted_names

# Example usage

names = ['Steven XL', 'Steven XVI', 'David IX', 'Mary XV', 'Mary XIII', 'Mary XX']

sorted_names = sort_names(names)

print(sorted_names)

names = ['Steven XL', 'Steven XVI', 'David IX', 'Mary XV', 'Mary XIII', 'Mary XX']

print(sort_by_name_and_roman_numeral(names))

To be able to do the code, one can create a custom sorting function that first separates the name and Roman numeral, converts the Roman numeral to its decimal equivalent, and then sorts the list accordingly.

The above script tells a roman_to_decimal function to convert a Roman numeral to its decimal equivalent and a custom_sort function that separates the name and Roman numeral, converting the latter to decimal for sorting.

See text below

Given a list of strings comprised of a name and a Roman numeral, sort the list first by name, then by the decimal value of the Roman numeral. In Roman numerals, a value is not repeated more than three times. At that point, a smaller value precedes a larger value to indicate subtraction. For example, the letter I represents the number 1, and V represents 5. Reason through the formation of 1 to 10 below and see how it is applied in the following lines.

I, II, III, IV, V, VI, VII, VIII, IX, and X represent 1 through 10.

XX, XXX, XL, and L are 20, 30, 40, and 50.

For any other two-digit number < 50, concatenate the Roman numeral(s) that represent its multiples of ten with the Roman numeral(s) for its values < 10. For example, 43 is 40 + 3 = XL + III = XLIII.

Example