Returns a Hash containing implementation-dependent counters inside the VM.
This hash includes information about method/constant cache serials:
{
:global_constant_state=>481,
:class_serial=>9029
}
The contents of the hash are implementation specific and may be changed in the future.
This method is only expected to work on C Ruby.
Returns a Digest subclass by name in a thread-safe manner even when on-demand loading is involved.
require 'digest' Digest("MD5") # => Digest::MD5 Digest(:SHA256) # => Digest::SHA256 Digest(:Foo) # => LoadError: library not found for class Digest::Foo -- digest/foo
Returns object. This method is deprecated and will be removed in Ruby 3.2.
Returns false. This method is deprecated and will be removed in Ruby 3.2.
Returns object. This method is deprecated and will be removed in Ruby 3.2.
Prevents further modifications to obj. A RuntimeError will be raised if modification is attempted. There is no way to unfreeze a frozen object. See also Object#frozen?.
This method returns self.
a = [ "a", "b", "c" ] a.freeze a << "z"
produces:
prog.rb:3:in `<<': can't modify frozen Array (FrozenError) from prog.rb:3
Objects of the following classes are always frozen: Integer, Float, Symbol.
Returns a string representing obj. The default to_s prints the object’s class and an encoding of the object id. As a special case, the top-level object that is the initial execution context of Ruby programs returns “main”.
Returns the value of int as a BigDecimal.
require 'bigdecimal' require 'bigdecimal/util' 42.to_d # => 0.42e2
See also BigDecimal::new.
Returns the int itself.
97.ord #=> 97
This method is intended for compatibility to character literals in Ruby 1.9.
For example, ?a.ord returns 97 both in 1.8 and 1.9.
Returns a string containing the place-value representation of int with radix base (between 2 and 36).
12345.to_s #=> "12345" 12345.to_s(2) #=> "11000000111001" 12345.to_s(8) #=> "30071" 12345.to_s(10) #=> "12345" 12345.to_s(16) #=> "3039" 12345.to_s(36) #=> "9ix" 78546939656932.to_s(36) #=> "rubyrules"
Iterates the given block, passing in integer values from int up to and including limit.
If no block is given, an Enumerator is returned instead.
5.upto(10) {|i| print i, " " } #=> 5 6 7 8 9 10
Iterates the given block, passing in decreasing values from int down to and including limit.
If no block is given, an Enumerator is returned instead.
5.downto(1) { |n| print n, ".. " } puts "Liftoff!" #=> "5.. 4.. 3.. 2.. 1.. Liftoff!"
Returns the predecessor of int, i.e. the Integer equal to int-1.
1.pred #=> 0 (-1).pred #=> -2
Returns the largest number less than or equal to int with a precision of ndigits decimal digits (default: 0).
When the precision is negative, the returned value is an integer with at least ndigits.abs trailing zeros.
Returns self when ndigits is zero or positive.
1.floor #=> 1 1.floor(2) #=> 1 18.floor(-1) #=> 10 (-18).floor(-1) #=> -20
Returns the remainder after dividing int by numeric.
x.remainder(y) means x-y*(x/y).truncate.
5.remainder(3) #=> 2 -5.remainder(3) #=> -2 5.remainder(-3) #=> 2 -5.remainder(-3) #=> -2 5.remainder(1.5) #=> 0.5
See Numeric#divmod.
Returns the value as a rational.
1.to_r #=> (1/1) (1<<64).to_r #=> (18446744073709551616/1)
Returns a complex object which denotes the given rectangular form.
Complex.rectangular(1, 2) #=> (1+2i)
Returns a complex object which denotes the given rectangular form.
Complex.rectangular(1, 2) #=> (1+2i)
Returns a complex object which denotes the given rectangular form.
Complex.rectangular(1, 2) #=> (1+2i)
Returns false, even if the complex number has no imaginary part.
Returns the value as a string.
Complex(2).to_s #=> "2+0i" Complex('-8/6').to_s #=> "-4/3+0i" Complex('1/2i').to_s #=> "0+1/2i" Complex(0, Float::INFINITY).to_s #=> "0+Infinity*i" Complex(Float::NAN, Float::NAN).to_s #=> "NaN+NaN*i"