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.d.cwdayReturns the calendar weekday (1-7, Monday being 1) for d.d.cweekReturns the calendar week (1-53) for d.d.cwyearReturns the calendar week-based year for d.d.dayd.mdayReturns the day of the month (1-31) for d.d.downto( min) {| date|.}Runs block on dates ranging from d down to min.Equivalent to d.step(min), -1) {|date|.}.d.jdReturns the Julian day number for d.d.leap?Returns true if d is a leap year.d.mjdReturns the modified Julian day number for d.Modified Julian day number is the number of days since midnight November17, 1858.d.mond.monthReturns the month (1-12) for d.d.newsg([ start])Copies d to a new Date object and returns it after converting its cutover date to start.d.nextd.succReturns a new Date object one day later than d.d.sgReturns the Julian day number of the start of Gregorian dates for d.d.step( limit, step) {| date|.}Runs block on Date objects from d to limit incrementing step number of days each time.d.upto( max) {| date|.}Runs block on dates ranging from d up to max.Equivalent to d.step(max, 1) {|date|.}.d.wdayReturns the day of the week for d (0-6, Sunday being 0).d.ydayReturns the day of the year for d (1-366).d.yearReturns the year for d.Constants MONTHNAMESAn array of the names of the months of the yearDAYNAMESAn array of the names of the days of the week (Sunday being the first element)ITALYGregorian calendar start day number in ItalyENGLANDGregorian calendar start day number in EnglandJULIANStart specifier for Julian calendarGREGORIANStart specifier for Gregorian calendarParseDate Date representation parser moduleThe ParseDate module parses strings that represent calendar dates in various formats.Required Libraryrequire 'parsedate'Module Functionparsedate( str[, cyear=false])Parses a date and/or time expression within str and returns the parsed elements (year, month, day, hour, minute, second, timezone, and day of the week) as an array.Sunday is represented as 0 in the day-of-the-week element.nil is returned forelements that can't be parsed or have no corresponding string representation.If cyear is true, years with a value of 68 orless are interpreted as being in the 2000s and years ranging from 69 to 99 are interpreted as being in the 1900s.In summary,beware of the Y2K69 problem!timeout Time out a lengthy procedureTimes out a lengthy procedure or those that continue execution beyond a set duration.Required Libraryrequire 'timeout'Functiontimeout( sec) {.}Executes the block and returns true if the block execution terminates successfully prior to elapsing of the timeout period,otherwise immediately terminates execution of the block and raises a TimeoutError exception.require 'timeout'status = timeout(5) {# something that may take time}MD5 MD5 message digest classThe MD5 class provides a one-way hash function from arbitrary text data by using the algorithm described in RFC-1321 Examplerequires 'md5'md5 = MD5::new("matz")puts md5.hexdigest # prints: 3eb50a8d683006fdf941b9860798f9aaClass MethodsMD5::new([ str])MD5::md5([ str])Creates a new MD5 object.If a string argument is given, it's added to the object.Instance Methodsmd.cloneCopies the MD5 object.md.digestReturns the MD5 hash of the added strings as a string of 16 bytes.md.hexdigestReturns the MD5 hash of the added strings as a string of 32 hexadecimal digits.md.update( str)mdHere's the output from this sample file:This is sample eRuby fileThe current time here is Wed Aug 29 18:54:45 JST 2001.123There are two eRuby implementations:erubyThe original implementation of eRuby.eruby is available fromhttp://www.modruby.net.ErbA pure Ruby (subset) implementation of eRuby.eRuby is available from http://www2a.biglobe.ne.jp/~seki/ruby/erb-1.3.3.tar.gz; The versionnumber may be changed in the future.Unfortunately, the supporting pagehttp://www2a.biglobe.ne.jp/~seki/ruby/ is in Japanese, but you can tell how to use it from itssource code. 5.3 Ruby Application ArchiveDo you want to access databases, such as PostgreSQL or MySQL from Ruby? Do you wishto use such nonstandard GUI toolkits as Qt, Gtk, FOX, etc.? You can with the RubyApplication Archive (RAA), which has a collection of Ruby programs, libraries,documentations, and binary packages compiled for specific platforms.You can access RAAat http://www.ruby-lang.org/en/raa.html.RAA is still far smaller than Perl's CPAN, but it'sgrowing every day.RAA contains the following elements:The latest 10 itemsA list of Ruby applicationsA list of Ruby librariesA list of Ruby portingA list of Ruby documentsYou can enter your program in RAA by clicking "add new entry" at the top of the RAApage, then following the instructions there.RAA itself is a fully automated web applicationwritten in Ruby.It uses eRuby and PStore as a backend. Chapter 6.Ruby UpdatesCompared to most other languages, Ruby is rather young.As a result, it's still evolving fairlyrapidly.If you find a bug in Ruby, the first thing to do is to check the bug database and see if theproblem has already been reported.The bug database can be found athttp://www.ruby-lang.org/cgi-bin/ruby-bugs
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