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A dynamic, open source programming language with a focus on simplicity and productivity. It has an elegant syntax that is natural to read and easy to write. Download Ruby or Read More... # Ruby knows what you # mean, even if you # want to do math on # an entire Array cities = %w[ London. Oslo.
The official frequently asked questions. Ruby Koans. The Koans walk you along the path to enlightenment in order to learn Ruby. The goal is to learn the Ruby language, syntax, structure, and some common functions and libraries. We also teach you culture.
In the Playground you can try any Ruby code you like. The Official Ruby documentation is included.
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:
Dec 25, 2021 · We are pleased to announce the release of Ruby 3.1.0. Ruby 3.1 keeps compatibility with Ruby 3.0 and also adds many features. YJIT: New experimental in-process JIT compiler. Ruby 3.1 merges YJIT, a new in-process JIT compiler developed by Shopify.
What is Ruby? Ruby is a simple and powerful object-oriented programming language, created by Yukihiro Matsumoto (who goes by the handle “Matz” in this document and on the mailing lists). Like Perl, Ruby is good at text processing. Like Smalltalk, everything in Ruby is an object, and Ruby has blocks, iterators, meta-classes and other good stuff.
Double-quoted strings allow escape sequences (like \t) and a special “expression substitution” syntax (which allows you to insert the results of Ruby expressions directly into other strings without having to "add " + "strings " + "together").
We'll install Ruby in ~/.rubies/ruby-master, so create the directory: mkdir ~/.rubies; Run configure:../configure --prefix="${HOME}/.rubies/ruby-master" Also -C (or --config-cache) would reduce time to configure from the next time. Build Ruby: make; Run tests to confirm your build succeeded. Install Ruby: make install
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. Code throughout the Ruby core, Ruby standard library, and Ruby gems generates exceptions in certain circumstances:
Calls block once for each key in hsh, passing the key-value pair as parameters. If no block is given, an enumerator is returned instead. h = { "a" => 100, "b" => 200 } h. each {|key, value| puts "#{key} is #{value}" } produces: a is 100 b is 200. each_key {| key | block } → hsh click to toggle source.
