Thanks to the following for pointing out mistakes, providing suggestions, or helping to improve the quality of this online text:

• Tiuley
• Irene
• Moataz El Ayadi
• Hanan Ayad
• Ken Ip
• Heung Soo Kim
• Mark Dittmer
• Timothy Worboys
• Michael Wesolowski
• Eric Cousineau
• Daniel Pino (from Argentina)
• Robert Xu
• Nikolay Kirov (example on iterators)
• Min Chang
• Dominic Cheng
• Jean-Paul Haddad
• Mukund Vemuri
• Ryan Van der Elst
• Priyank Patel
• Spencer McEwan
• Carlos Moreno
• Arpinder Bachhal
• Ran Ginosar
• Vajih Montaghami
• Jonathan Tan
• Yuchen (Eric) Wei
• Said Afifi
• Ramtin Azari
• Shirin Srikumar
• Shi Yao Liu
• Dominiq Bola
• Peter Zhang
• Edward Chao
• Ibad Khan
• Akshay Joshi
• Paul Agotici
• Alan (Ling) Xu
• Yifeng Zhu
• Sudhanva Huruli
• Scott Bohdanow
• Jonathan Wong
• Aaron Zink
• Alexandru Blidaru
• Ben Reyhani
• Ashwin Venkatesh Raman
• Chang Bok Lee
• Mohammed Abdul-Rehman Babur
• Roshaan Tahir
• Ben Lin
• Teng Wu
• Sepehr Eghbali
• Alexander Lang
• Jingyun Bian
• Sunjay Varma
• Yuki Ji
• John Feather
• Evey Liu
• Emmanuel Utuama
• Chengyi (Calvin) Zhou
• James Whitehead
• Wei Du
• Vivian Mac
• Christopher Ciufo
• Stephen Molyneaux
• Nathan Lang
• Matt Magni
• Sashakt Tyagi
• Ryan Chu
• Kai Luo
• Andrew Wright
• Hormoz Kheradmand
• Bailey Thompson
• Shwapneel Ishraq
• David Samyde