Programming Ruby 3.3

Appendix 2I Can’t Look It Up!

Ruby has a lot of notation and typography that is called by a name that isn’t necessarily obvious, making it hard to search for the meaning of a particular line of code. Here are a few particularly important symbols:

Symbol	Name	Functionality
||=	Or-equals	Is like other Ruby operate and assign operators. x ||= y is equivalent to x = x || y. Because of Ruby’s short circuit of boolean operators, the expression means that if x is nil, the new value is y, and if x isn’t nil, then x’s value remains the same. Is often used as a shortcut to set a default value.
=~ !~	Match operators	With a string on one side of the operator and a regular expression on the other, =~ returns true if the string matches the regular expression, ...