Complete the method/function so that it converts dash/underscore delimited words into camel casing. the first word within the output should be capitalized only if the original word was capitalized. specifications challenge. tocamelcase(str) given a string with dashes and underscore, convert to camel case parameters str: string - string to be converted return value string - string without dashes/underscores and camel cased examples str return value "the-stealth-warrior" "thestealthwarrior" "a-b-c" "abc"