Ruby Documentation Welcome to the official Ruby programming language documentation. Getting Started New to Ruby? Start with our Getting Started Guide. Core Classes and …

Identical regexp can or cannot run in linear time depending on your ruby binary. Neither forward nor backward compatibility is guaranteed about the return value of this method.

Ruby is an interpreted object-oriented programming language often used for web development. It also offers many scripting features to process plain text and serialized files, or manage system …

Ruby code can raise exceptions. Most often, a raised exception is meant to alert the running program that an unusual (i.e., exceptional) situation has arisen, and may need to be handled.

This system is hosting the development of Ruby language and its related projects. You must register your account and activate it via an email before reporting issues.

See class Float for the constants that affect Ruby’s floating-point arithmetic. What’s Here Trigonometric Functions ::cos: Returns the cosine of the given argument. ::sin: Returns the …

Because Timeout doesn't define the trap handler, the user does. And asking every user to workaround like that doesn't seem good, that actually creates more threads than a single …

Formats for Dates and Times Several Ruby time-related classes have instance method strftime, which returns a formatted string representing all or part of a date or time: Date#strftime. …

TWO Symbol Literals A Symbol represents a name inside the ruby interpreter. See Symbol for more details on what symbols are and when ruby creates them internally. You may reference …

Jul 24, 2025 · Ruby 3.3.9 has been released. This release includes the following security fix of default gems: CVE-2025-24294: Possible Denial of Service in resolv gem and the following …