Ruby allows you to use non-alphanumeric characters in method names. There are a couple that are used fairly commonly: ? and !<\/p>\n
You put the character at the end of the method name.<\/p>\n
? indicates a “predicate” method. This is a method that returns true or false. So, for example, if you want to know if the result of a particular operation is true or false, you can create a method that does that operation, then returns true or false based on the result of the operation.<\/p>\n
For example, if you want to know if the player won a game, you could make a method called “won?”<\/p>\n
Then use it like:<\/p>\n
if won?
\n puts “Congratulations, you won!”
\nelse
\n puts “Sorry, you lost.”\n<\/p><\/blockquote>\nIt’s a great way to make code that almost reads like English.<\/p>\n
Bang<\/h2>\n
A bang method tells you that this method does something “dangerous” (changes a value, dun, dun, duu-uu-un).<\/p>\n
def turns_remaining!
\n @turns_remaining -= 1 # decrements variable
\nend<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"Ruby allows you to use non-alphanumeric characters in method names. There are a couple that are used fairly commonly: ? and ! You put the character at the end of the method name. Predicate ? indicates a “predicate” method. This is a method that returns true or false. So, for example, if you want to … <\/p>\n