Consider softwareengineering.stackexchange.com/questions/193786/… — Passerby 51 secs ago

Open letter to students with homework problems and How to ask homework questions: Make a genuine attempt yourself, show your code, ask a specific question. — kaylum 22 secs ago

Stack Overflow is not a code writing service. Open letter to students with homework problems and How to ask homework questions: Make a genuine attempt yourself, show your code, ask a specific question. — kaylum 58 secs ago

"Where can I find more info on "is" vs "="?" - try my book, XSLT Programmers' Reference ;-) — Michael Kay 21 secs ago

Welcome to Stack Overflow. Please take the tour to learn how Stack Overflow works and read How to Ask on how to improve the quality of your question. Then check the help center to see what questions you can ask. Please see: Why is “Is it possible to…” a poorly worded question? (don't just change your question to "How"). — Progman 7 secs ago

This looks like a Homework question, please read this: softwareengineering.meta.stackexchange.com/questions/6166/… — Cornelius Roemer just now

Open letter to students with homework problems and How to ask homework questions: Make a genuine attempt yourself, show your code, ask a specific question. — kaylum 33 secs ago