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| About site: http://www.ntecs.de/old-hp/s-direktnet/ruby_en.html |
Title: Programming/Languages/Ruby - Features of Ruby By Michael Neumann in English and German.
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Features of Ruby
 
Features of Ruby
by Michael Neumann
interpreted
object-oriented
portable
untyped
automatic memory-management (garbage collection)
easy and clear syntax
advanced OO-concepts and features
other features
interpreted
advantage:
immediately executable (no waiting period while
compiling)
disadvantage:
execution speed much slower than with compiler (e.g.
Pascal, C++)
object-oriented
In Ruby everything is an object (as in Smalltalk). Ruby
did not use multiple-inheritance, but the same is possible
through mix-in.
portabel
Ruby is highly portable, so that one and the same Ruby program
runs without changes under UNIX, Windows, DOS, Mac, BeOS and
others. Of course that's only true unless using platform-specific
modules, like for example some GUI's for UNIX or WinGKR (Win32
GUI Kit for Ruby).
advantage:
less expenditure (only one program had to be managed)
wider distribution of the program (because it runs on
serveral platforms)
untyped
Variables in Ruby have no type, such as in Smalltalk, BASIC or
Python. Variables behave as placeholders, but data is typed. In
C++ or Pascal, variables are typed (e.g. int / Integer), but the
data in the memory is not, that is you cannot recognize if it's a
String or an Integer. In C++ or Pascal the types are checked at
compile-time, whereas Ruby checks the type at runtime, so if the
object understands the message (method-call) is first known after
a method-call. You do not have to declare variables, because they
are automatically created when you use them.
automatic memory-management (garbage
collection)
You do not have to release allocated memory in Ruby (as you
have to do in Pascal/C++ with dispose/free). No longer used
memory, i.e. memory-frames where no variable points to, are
automatically freed by the garbage collector.
advantage:
no memory leaks
fewer crashs or errors
more easier, faster and more uncomplicated programming,
because you do not have to look after the memory
management.
disadvantage:
less speed (about 10%). But Ruby is an interpreted
language, where 10% are not so much.
easy and clear syntax
Ruby is based among others on the syntax of Eiffel (Ada)
well legible
ease to understand
easy to learn
fewer errors
Ruby often offers an additional C++ similar syntax
hardly changes for those, who come from C++ (Perl) to
Ruby
less code ==> faster
advanced OO-concepts and features
singleton methods
mix-in instead of multiple-inheritance
operator overloading
method-overloading (such as C++)
exception handling
iterators and closures
meta-class
build-in pattern-matching (like Perl)
other features
Ruby is free, also for commercial applications
many existing libraries make programming easy
Ruby is permanently developed, without loosing
backward-compatibility
There are interfaces to Python, Perl and Java. Thus
existing programs can be reused.
Many important data-structures are available (such as
dynamic arrays (lists), strings, bignum, complex, ....)
Easy to extend through C/C++ with dynamic (DLL's) or
static binding.
Copyright (c) 1999 by Michael Neumann (neumann@s-direktnet.de)
last update: 14.01.2001
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By | Michael | Neumann | in | English | and | German. |
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http://www.ntecs.de/old-hp/s-direktnet/ruby_en.html
Features of Ruby 2008 September
dvd rental
dvd
By Michael Neumann in English and German.
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