Results for: "Array"

Exception#backtrace

Returns any backtrace associated with the exception. The backtrace is an array of strings, each containing either “filename:lineNo: in ‘method”’ or “filename:lineNo.”

def a
  raise "boom"
end

def b
  a()
end

begin
  b()
rescue => detail
  print detail.backtrace.join("\n")
end

produces:

prog.rb:2:in `a'
prog.rb:6:in `b'
prog.rb:10

NoMethodError#args

Return the arguments passed in as the third parameter to the constructor.

SystemCallError#errno

Return this SystemCallError’s error number.

BigDecimal#frac

Return the fractional part of the number, as a BigDecimal.

Integer#numerator

Returns self.

Integer#rationalize

Returns the value as a rational. The optional argument eps is always ignored.

Rational#numerator

Returns the numerator.

Rational(7).numerator        #=> 7
Rational(7, 1).numerator     #=> 7
Rational(9, -4).numerator    #=> -9
Rational(-2, -10).numerator  #=> 1

Rational#rationalize

Returns a simpler approximation of the value if the optional argument eps is given (rat-|eps| <= result <= rat+|eps|), self otherwise.

r = Rational(5033165, 16777216)
r.rationalize                    #=> (5033165/16777216)
r.rationalize(Rational('0.01'))  #=> (3/10)
r.rationalize(Rational('0.1'))   #=> (1/3)

Date::today

Creates a date object denoting the present day.

Date::_parse

Parses the given representation of date and time, and returns a hash of parsed elements. This method does not function as a validator.

If the optional second argument is true and the detected year is in the range “00” to “99”, considers the year a 2-digit form and makes it full.

Date._parse('2001-02-03') #=> {:year=>2001, :mon=>2, :mday=>3}

Date::parse

Parses the given representation of date and time, and creates a date object. This method does not function as a validator.

If the optional second argument is true and the detected year is in the range “00” to “99”, considers the year a 2-digit form and makes it full.

Date.parse('2001-02-03')          #=> #<Date: 2001-02-03 ...>
Date.parse('20010203')            #=> #<Date: 2001-02-03 ...>
Date.parse('3rd Feb 2001')        #=> #<Date: 2001-02-03 ...>

Date#year

Returns the year.

Date.new(2001,2,3).year           #=> 2001
(Date.new(1,1,1) - 1).year        #=> 0

Date#yday

Returns the day of the year (1-366).

Date.new(2001,2,3).yday           #=> 34

Date#mday

Returns the day of the month (1-31).

Date.new(2001,2,3).mday           #=> 3

Date#day

Returns the day of the month (1-31).

Date.new(2001,2,3).mday           #=> 3

Date#cwyear

Returns the calendar week based year.

Date.new(2001,2,3).cwyear         #=> 2001
Date.new(2000,1,1).cwyear         #=> 1999

Date#cwday

Returns the day of calendar week (1-7, Monday is 1).

Date.new(2001,2,3).cwday          #=> 6

Date#wday

Returns the day of week (0-6, Sunday is zero).

Date.new(2001,2,3).wday           #=> 6