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Ruby documentation welcome to the official ruby programming language documentation When the last argument in a method call is a hash, the curly braces may be omitted: Getting started new to ruby

Start with our getting started guide Def some_method (hash) p hash end some_method ({foo Core classes and modules explore the essential classes and modules

Some members of the ruby community feel that you should avoid package managers to install ruby and that you should use dedicated tools instead.

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. Miniruby is a version of ruby which has no external dependencies and lacks certain features It can be useful in ruby development because it allows for faster build times.

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. What’s here trigonometric functions ::cos Returns the cosine of the given argument

Returns the sine of the given argument

Returns the tangent of the given argument Returns the arc cosine of the given. The ruby standard library is a large collection of classes and modules you can require in your code to gain additional features Below is an overview of the libraries and extensions, followed by a brief description of each.

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. Each of these methods takes optional argument format, which has zero or more embedded format specifications (see below). 'ruby'} person # => {name

Ruby} you can use a hash to give names to method arguments

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