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index - Documentation for Ruby 4. 0 Ruby Documentation Welcome to the official Ruby programming language documentation Getting Started New to Ruby? Start with our Getting Started Guide Core Classes and Modules Explore the essential classes and modules: String - Text manipulation and string utilities Symbol - Named identifiers inside the Ruby interpreter
Documentation for Ruby 3. 4 Ruby Documentation Welcome to the official Ruby programming language documentation Getting Started New to Ruby? Start with our Getting Started Guide Core Classes and Modules Explore the essential classes and modules: String - Text manipulation and string utilities Symbol - Named identifiers inside the Ruby interpreter
class Regexp - Documentation for Ruby 4. 0 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
operators - Documentation for Ruby 4. 0 Operators In Ruby, operators such as +, are defined as methods on the class Literals define their methods within the lower level, C language String class, for example Ruby objects can define or overload their own implementation for most operators Here is an example: class Foo < String def + (str) self concat (str) concat ("another string")
exceptions - Documentation for Ruby 4. 0 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
class Struct - Documentation for Ruby 4. 0 class Struct: Class \Struct provides a convenient way to create a simple class that can store and fetch values tt>; the first argument, a string, is the name of th
strftime_formatting - Documentation for Ruby 4. 0 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 DateTime#strftime Time#strftime Each of these methods takes optional argument format, which has zero or more embedded format specifications (see below)
module Math - Documentation for Ruby 4. 0 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 sine of the given argument ::tan: Returns the tangent of the given argument Inverse Trigonometric Functions ::acos: Returns the arc cosine of the given
class Thread - Documentation for Ruby 4. 0 Threads are the Ruby implementation for a concurrent programming model Programs that require multiple threads of execution are a perfect candidate for Ruby’s Thread class
class Hash - Documentation for Ruby 4. 0 person = {name: 'Matz', language: 'Ruby'} person # => {name: "Matz", language: "Ruby"} You can use a hash to give names to method arguments: def some_method (hash) p hash end some_method ({foo: 0, bar: 1, baz: 2}) # => {foo: 0, bar: 1, baz: 2} Note: when the last argument in a method call is a hash, the curly braces may be omitted: