![]() Putting it all together, $romanValues] allows you to access the integer value that corresponds to the Roman numeral character at the current index in the input string $s. In other words, it uses the character obtained from $s as the key to access the corresponding numeric value in the array. $romanValues]: This part of the line looks up the integer value associated with the Roman numeral character $s in the $romanValues array.For example, if $i is pointing to ‘I’, then $s is ‘I’. $s represents the Roman numeral character at the current index.For example, it contains mappings like ‘I’ => 1, ‘V’ => 5, ‘X’ => 10, and so on. $romanValues: This is an associative array that maps Roman numeral characters to their corresponding integer values.For example, if $i is currently pointing to the last character ‘I’, then $s would give you ‘I’. $s: This part retrieves the character at the current index $i in the string $s.Now, let’s break down the nested indexing: $i is an index variable that represents the current position within the string.The syntax $romanValues] involves nested indexing, where you’re accessing elements in an associative array using values obtained from another array. ![]() You can use this approach to access any element in the associative array based on its key. So, for example, $romanValues gives you the value 1, and $romanValues gives you the value 5. This retrieves the corresponding integer value. In the above code, we access the value associated with each Roman numeral character by specifying the key (Roman numeral character) inside square brackets after the array variable $romanValues. ![]() $valueOfX = $romanValues // $valueOfX will be 10 $valueOfV = $romanValues // $valueOfV will be 5 ![]() $valueOfI = $romanValues // $valueOfI will be 1 Here’s how you can access elements in the $romanValues array: $romanValues = [ The key is the Roman numeral character, and the value is the corresponding integer. To access an element in the associative array $romanValues, you use the key associated with the element inside square brackets. In summary, this line allows you to obtain the integer value of the current Roman numeral character in the input string, which is essential for the Roman numeral to integer conversion. So, when you write $romanValues], it looks up the integer value associated with the Roman numeral character at the current index. For example, it has the mapping ‘I’ => 1, ‘V’ => 5, ‘X’ => 10, and so on. $romanValues is an associative array that maps Roman numeral characters to their corresponding integer values.So, $s retrieves the Roman numeral character at the current index.įor example, if you have the Roman numeral string “XXVII” and $i is currently pointing to the last character ‘I’, then $s would give you ‘I’. $i is the current index in the string, which is used to access the character at that position.The line $currentValue = $romanValues] is responsible for obtaining the integer value associated with the current Roman numeral character in the string. It iterates through the string in reverse order and calculates the total integer value. If we repeat X two times, we have XXX.This code defines the romanToInt function, which takes a Roman numeral string as input and converts it to an integer using the specified Roman numeral rules. If we write X and then repeat it, we have XX. Do not be fooled by the word repeat, which means "do again".
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |