# Get the File Extension by Helen Yu tags: strings, higher_order_functions, arrays ## Summary > Write a function that maps files to their extension names. > Examples > getExtension(["code.html", "code.css"]) > ➞ ["html", "css"] > getExtension(["project1.jpg", "project1.pdf", "project1.mp3"]) > ➞ ["jpg", "pdf", "mp3"] > getExtension(["ruby.rb", "cplusplus.cpp", "python.py", "javascript.js"]) > ➞ ["rb", "cpp", "py", "js"] > Notes > N/A ## Instructions Write a function that maps files to their extension names. ### Examples ``` getExtension(["code.html", "code.css"]) ➞ ["html", "css"] getExtension(["project1.jpg", "project1.pdf", "project1.mp3"]) ➞ ["jpg", "pdf", "mp3"] getExtension(["ruby.rb", "cplusplus.cpp", "python.py", "javascript.js"]) ➞ ["rb", "cpp", "py", "js"] ``` ### Notes N/A