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1 2 3 4 5 6 7 8 9 10 11 12 13 14 | function genitiveOfWord(name:string):string { // checks if "s" can be used for name's plural or if an apostrophe has to be used let lastLetter = name[name.length - 1]; let lastTwoLetters = name.substr(name.length - 2, 2).toLowerCase(); return ( lastLetter === 's' || lastLetter === 'ß' || lastLetter === 'z' || lastLetter === 'x' || lastTwoLetters === "ce" ) ? (name + "'") : (name + "s"); } export {genitiveOfWord} |