class Fixnum < Integer

A Fixnum holds Integer values that can be represented in a native machine word (minus 1 bit). If any operation on a Fixnum exceeds this range, the value is automatically converted to a Bignum.

Fixnum objects have immediate value. This means that when they are assigned or passed as parameters, the actual object is passed, rather than a reference to that object. Assignment does not alias Fixnum objects. There is effectively only one Fixnum object instance for any given integer value, so, for example, you cannot add a singleton method to a Fixnum.

instance methods

Arithmetic operations

Performs various arithmetic operations on fix.

fix	+	aNumeric	Addition
fix	-	aNumeric	Subtraction
fix	*	aNumeric	Multiplication
fix	/	aNumeric	Division
fix	%	aNumeric	Modulo
fix	**	aNumeric	Exponentiation

Bit operations

Performs various operations on the binary representations of the Fixnum.

~ fix			Invert bits
fix	|	aNumeric	Bitwise OR
fix	&	aNumeric	Bitwise AND
fix	^	aNumeric	Bitwise EXCLUSIVE OR
fix	<<	aNumeric	Left-shift aNumeric bits
fix	>>	aNumeric	Right-shift aNumeric bits (with sign extension)

<=>

fix <=> aNumeric → -1, 0, +1

Comparison—Returns -1, 0, or +1 depending on whether fix is less than, equal to, or greater than aNumeric. This is the basis for the tests in Comparable.

[ ]

fix[ n ] → 0, 1

Bit Reference—Returns the nth bit in the binary representation of fix, where fix[0] is the least significant bit.

a = 0b11001100101010 30.downto(0) do |n| print a[n] end

produces:

0000000000000000011001100101010

id2name

fix.id2name → aString or nil

Returns the name of the object whose symbol id is the value of fix. If there is no symbol in the symbol table with this value, returns nil. id2name has nothing to do with the Object.id method. See also String#intern and class Symbol.

symbol = :@inst_var → :@inst_var id = symbol.to_i → 9002 id.id2name → "@inst_var"

size

fix.size → aFixnum

Returns the number of bytes in the machine representation of a Fixnum.

to_f

fix.to_f → aFloat

Converts fix to a Float.

to_i

fix.to_i → fix

Returns fix.

to_s

fix.to_s → aString

Returns a string containing the decimal representation of self.