Ruby/Number/Number class
Материал из Wiki.crossplatform.ru
floor Returns the largest integer less than or equal.
1.2.floor 2.0.floor (2.2).floor (1.0).floor
infinite? Returns nil,1,or +1 depending on whether flt is finite.
(0.0).infinite? (?.0/0.0).infinite? (+1.0/0.0).infinite?
Math class and module hierarchy
Object | +--------------+ | | Numermic Matrix | | Integer | | +-----------+----------------------+---------+ | | | | Fixnum Bignum complex Rational (math Module) (Precision module
modulo(numeric): Synonym for Float#%.
6543.21.modulo(137) 6543.21.modulo(137.24)
Number Introduction
1000.class # => Fixnum 10000000000.class # => Bignum (2**30 - 1).class # => Fixnum (2**30).class # => Bignum small = 1000 big = small ** 5 # => 1000000000000000 big.class # => Bignum smaller = big / big # => 1 smaller.class # => Fixnum 0.01.class # => Float 1.0.class # => Float 10000000000.00000000001.class # => Float
Numbers are classes
2.class # => Fixnum 2.0.class # => Float 2_000_000_000.class # => Bignum
Ruby has a number of classes and modules related to numbers.
Numeric The base class for numbers Integer The basic integer class, and the basis for the Fixnum class Float The class for real or floating-point numbers, based on the computer"s native capacity to represent double-precision Fixnum The main integer class, based on what the computer can hold in a native machine word, such as 32 bits or 64 bits, minus 1 Bignum The class of integers outside the range of the basic, native machine word Math A module that holds math functions (as methods) Precision A module for approximating the precision of real numbers Rational A class that represents fractional numbers Complex A class that represents complex numbers, which extend real numbers with imaginary numbers (x + iy) Matrix A class for creating mathematical matrixes
