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nobu 491c44e984 Clarify set intersection and union documentation
* array.c (rb_ary_and): clarify that set intersection returns the
  unique elements common to both arrays.

* array.c (rb_ary_or): clarify that union preserves the order from
  the given arrays.

- Most know what intersection means, but saying the operation
  excludes duplicates could be misleading ([1] & [1], duplicates
  excluded, might mean a result of []).
- Instead, saying intersection returns the unique elements common to both
  arrays is more concise and less ambiguous.
- The set union's documentation was incomplete in its describing
  preservation of order. Saying union preserves the order of the
  original array neglects the idea that the order of the elements
  in both arrays, as given, will be preserved.
- Instead, saying set union preserves the order from the given arrays (and
  adding an example) fully demonstrates the idea.

[Fix GH-1273] [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53958 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2016-02-28 01:20:39 +00:00
basictest
benchmark
bin
bootstraptest
ccan
coverage
cygwin
defs
doc doc: editor local variables [ci skip] 2016-02-26 05:40:28 +00:00
enc * enc/unicode/case-folding.rb, casefold.h: Reducing size of TitleCase 2016-02-27 08:06:17 +00:00
ext cgi/escape: Optimize CGI.unescape 2016-02-21 04:57:57 +00:00
gems
include * remove trailing spaces. 2016-02-24 13:32:02 +00:00
lib * lib/xmlrpc.rb: Removed references to NQXML. It's obsoleted parser. 2016-02-26 02:25:40 +00:00
man
misc
missing
nacl
sample
spec
template
test test/unit: refine output in job_status=normal 2016-02-27 05:10:44 +00:00
tool
win32
.document
.editorconfig
.gdbinit
.gitattributes
.gitignore
.indent.pro
.travis.yml
acinclude.m4
aclocal.m4
addr2line.c
addr2line.h
appveyor.yml
array.c Clarify set intersection and union documentation 2016-02-28 01:20:39 +00:00
bignum.c
BSDL
ChangeLog Clarify set intersection and union documentation 2016-02-28 01:20:39 +00:00
class.c
common.mk
compar.c
compile.c
complex.c
configure.in
constant.h
cont.c
CONTRIBUTING.md
COPYING
COPYING.ja
debug.c
dir.c
dln.c
dln.h
dln_find.c
dmydln.c
dmyenc.c
dmyext.c
encindex.h
encoding.c
enum.c
enumerator.c
error.c
eval.c eval_error.c: remove warn_printf 2016-02-25 12:36:24 +00:00
eval_error.c eval_error.c: constify 2016-02-25 12:36:25 +00:00
eval_intern.h
eval_jump.c
file.c
gc.c
gc.h
gem_prelude.rb Reduce system calls by activating the did_you_mean gem. 2016-02-25 23:23:30 +00:00
golf_prelude.rb
goruby.c
GPL
hash.c
ia64.s
id_table.c
id_table.h
inits.c
insns.def
internal.h internal.h: shortcut macros 2016-02-22 07:15:56 +00:00
io.c parse without $. 2016-02-24 08:21:04 +00:00
iseq.c
iseq.h iseq.h: remove trailing comma 2016-02-23 07:59:17 +00:00
KNOWNBUGS.rb
LEGAL
lex.c.blt
load.c
loadpath.c
localeinit.c
main.c
Makefile.in
marshal.c
math.c
method.h
miniinit.c
NEWS NEWS: update [ci skip] 2016-02-21 04:52:04 +00:00
node.c
node.h
numeric.c numeric.c: wrong type step should raise TypeError 2016-02-26 05:41:37 +00:00
object.c
pack.c
parse.y parse without $. 2016-02-24 08:21:04 +00:00
prelude.rb
probes.d
probes_helper.h
proc.c
process.c
random.c * random.c (limited_rand): Add a specialized path for the limit fits in 32 bit. 2016-02-24 12:30:20 +00:00
range.c
rational.c
re.c
README.EXT
README.EXT.ja
README.ja.md README.md: fix linked file name [ci skip] 2016-02-26 07:18:26 +00:00
README.md README.md: fix linked file name [ci skip] 2016-02-26 07:18:26 +00:00
regcomp.c
regenc.c
regenc.h
regerror.c
regexec.c
regint.h
regparse.c
regparse.h
regsyntax.c
ruby.c parse without $. 2016-02-24 08:21:04 +00:00
ruby_assert.h
ruby_atomic.h
safe.c
signal.c
siphash.c
siphash.h
sparc.c
sprintf.c
st.c
strftime.c
string.c
struct.c
symbol.c
symbol.h
thread.c
thread_pthread.c
thread_pthread.h
thread_sync.c
thread_win32.c
thread_win32.h
time.c
timev.h
transcode.c
transcode_data.h
util.c
variable.c
version.c
version.h * 2016-02-27 2016-02-27 01:56:44 +00:00
vm.c vm.c (vm_cref_new0): adjust indent [ci skip] 2016-02-21 10:42:40 +00:00
vm_args.c
vm_backtrace.c
vm_core.h vm_core.h: CoreDataFromValue 2016-02-22 07:15:57 +00:00
vm_debug.h
vm_dump.c
vm_eval.c Fix Module#module_eval rdoc [ci skip] 2016-02-20 05:44:52 +00:00
vm_exec.c
vm_exec.h
vm_insnhelper.c
vm_insnhelper.h
vm_method.c vm_method.c: for hidden object 2016-02-24 02:38:43 +00:00
vm_opts.h
vm_trace.c
vsnprintf.c

Build Status Build status

What's Ruby

Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight-forward, and extensible.

Features of Ruby

  • Simple Syntax
  • Normal Object-oriented Features (e.g. class, method calls)
  • Advanced Object-oriented Features (e.g. Mix-in, Singleton-method)
  • Operator Overloading
  • Exception Handling
  • Iterators and Closures
  • Garbage Collection
  • Dynamic Loading of Object Files (on some architectures)
  • Highly Portable (works on many Unix-like/POSIX compatible platforms as well as Windows, Mac OS X, BeOS, etc.) cf. http://bugs.ruby-lang.org/projects/ruby-trunk/wiki/SupportedPlatforms

How to get Ruby

For a complete list of ways to install Ruby, including using third-party tools like rvm, see:

http://www.ruby-lang.org/en/downloads/

The Ruby distribution files can be found on the following FTP site:

ftp://ftp.ruby-lang.org/pub/ruby/

The trunk of the Ruby source tree can be checked out with the following command:

$ svn co http://svn.ruby-lang.org/repos/ruby/trunk/ ruby

Or if you are using git then use the following command:

$ git clone git://github.com/ruby/ruby.git

There are some other branches under development. Try the following command to see the list of branches:

$ svn ls http://svn.ruby-lang.org/repos/ruby/branches/

Or if you are using git then use the following command:

$ git ls-remote git://github.com/ruby/ruby.git

Ruby home page

The URL of the Ruby home page is:

http://www.ruby-lang.org/

Mailing list

There is a mailing list to talk about Ruby. To subscribe to this list, please send the following phrase:

subscribe

in the mail body (not subject) to the address mailto:ruby-talk-request@ruby-lang.org.

How to compile and install

This is what you need to do to compile and install Ruby:

  1. If you want to use Microsoft Visual C++ to compile ruby, read win32/README.win32 instead of this document.

  2. If ./configure does not exist or is older than configure.in, run autoconf to (re)generate configure.

  3. Run ./configure, which will generate config.h and Makefile.

    Some C compiler flags may be added by default depending on your environment. Specify optflags=.. and warnflags=.. as necessary to override them.

  4. Edit defines.h if you need. Usually this step will not be needed.

  5. Remove comment mark(#) before the module names from ext/Setup (or add module names if not present), if you want to link modules statically.

    If you don't want to compile non static extension modules (probably on architectures which do not allow dynamic loading), remove comment mark from the line "#option nodynamic" in ext/Setup.

    Usually this step will not be needed.

  6. Run make.

  7. Optionally, run 'make check' to check whether the compiled Ruby interpreter works well. If you see the message "check succeeded", your ruby works as it should (hopefully).

  8. Run 'make install'

    This command will create the following directories and install files into them.

    • ${DESTDIR}${prefix}/bin
    • ${DESTDIR}${prefix}/include/ruby-${MAJOR}.${MINOR}.${TEENY}
    • ${DESTDIR}${prefix}/include/ruby-${MAJOR}.${MINOR}.${TEENY}/${PLATFORM}
    • ${DESTDIR}${prefix}/lib
    • ${DESTDIR}${prefix}/lib/ruby
    • ${DESTDIR}${prefix}/lib/ruby/${MAJOR}.${MINOR}.${TEENY}
    • ${DESTDIR}${prefix}/lib/ruby/${MAJOR}.${MINOR}.${TEENY}/${PLATFORM}
    • ${DESTDIR}${prefix}/lib/ruby/site_ruby
    • ${DESTDIR}${prefix}/lib/ruby/site_ruby/${MAJOR}.${MINOR}.${TEENY}
    • ${DESTDIR}${prefix}/lib/ruby/site_ruby/${MAJOR}.${MINOR}.${TEENY}/${PLATFORM}
    • ${DESTDIR}${prefix}/lib/ruby/vendor_ruby
    • ${DESTDIR}${prefix}/lib/ruby/vendor_ruby/${MAJOR}.${MINOR}.${TEENY}
    • ${DESTDIR}${prefix}/lib/ruby/vendor_ruby/${MAJOR}.${MINOR}.${TEENY}/${PLATFORM}
    • ${DESTDIR}${prefix}/lib/ruby/gems/${MAJOR}.${MINOR}.${TEENY}
    • ${DESTDIR}${prefix}/share/man/man1
    • ${DESTDIR}${prefix}/share/ri/${MAJOR}.${MINOR}.${TEENY}/system

    If Ruby's API version is 'x.y.z', the ${MAJOR} is 'x', the ${MINOR} is 'y', and the ${TEENY} is 'z'.

    NOTE: teeny of the API version may be different from one of Ruby's program version

    You may have to be a super user to install ruby.

If you fail to compile ruby, please send the detailed error report with the error log and machine/OS type, to help others.

Some extension libraries may not get compiled because of lack of necessary external libraries and/or headers, then you will need to run 'make distclean-ext' to remove old configuration after installing them in such case.

Copying

See the file COPYING.

Feedback

Questions about the Ruby language can be asked on the Ruby-Talk mailing list (http://www.ruby-lang.org/en/community/mailing-lists) or on websites like (http://stackoverflow.com).

Bug reports should be filed at http://bugs.ruby-lang.org. Read HowToReport for more information.

##Contributing

See the file CONTRIBUTING.md

The Author

Ruby was originally designed and developed by Yukihiro Matsumoto (Matz) in 1995.

mailto:matz@ruby-lang.org