68 lines
1.8 KiB
Text
68 lines
1.8 KiB
Text
|
Class:: Float
|
||
|
|
summary:: Floating point number
|
||
|
|
categories:: Math
|
||
|
|
|
||
|
|
description::
|
||
|
|
A 64-bit double precision floating point number. Float inherits most of its behaviour from its superclass.
|
||
|
|
|
||
|
|
Note that despite its name, link::Classes/FloatArray:: only holds 32-bit (single precision) floats.
|
||
|
|
For a raw array of 64-bit floats, use link::Classes/DoubleArray::.
|
||
|
|
|
||
|
|
ClassMethods::
|
||
|
|
|
||
|
|
method:: from32Bits
|
||
|
|
returns:: a new Float from a 32 bit word.
|
||
|
|
|
||
|
|
method:: from64Bits
|
||
|
|
returns:: a new Float from a 64 bit word.
|
||
|
|
|
||
|
|
InstanceMethods::
|
||
|
|
|
||
|
|
method:: do
|
||
|
|
iterates a link::Classes/Function:: from code::0:: to code::this-1::. See also: link::Classes/Integer#-do::, link::Classes/Collection#-do::
|
||
|
|
argument:: function
|
||
|
|
The function to iterate.
|
||
|
|
|
||
|
|
method:: reverseDo
|
||
|
|
iterates function from this-1 to 0
|
||
|
|
argument:: function
|
||
|
|
The function to iterate.
|
||
|
|
|
||
|
|
method:: coin
|
||
|
|
Perform a random test whose probability of success in a range from
|
||
|
|
zero to one is this and return the result.
|
||
|
|
returns:: a link::Classes/Boolean::
|
||
|
|
discussion::
|
||
|
|
code::
|
||
|
|
0.2.coin; // 20 % chance for true.
|
||
|
|
::
|
||
|
|
See also: link::Guides/Randomness::
|
||
|
|
|
||
|
|
method:: isFloat
|
||
|
|
returns:: code::true:: since this is a Float.
|
||
|
|
|
||
|
|
method:: asFloat
|
||
|
|
returns:: code::this:: since this is a Float.
|
||
|
|
|
||
|
|
method:: as32Bits
|
||
|
|
returns:: an Integer which is the bit pattern of this as a 32bit single precision float
|
||
|
|
|
||
|
|
method:: high32Bits
|
||
|
|
returns:: an Integer which is the bit pattern of high 32 bits of the 64 bit double precision floating point value
|
||
|
|
|
||
|
|
method:: low32Bits
|
||
|
|
returns:: an Integer which is the bit pattern of high 32 bits of the 64 bit double precision floating point value
|
||
|
|
|
||
|
|
method:: asStringPrec
|
||
|
|
Returns a string representation of the number, with the desired precision (i.e. number of significant figures).
|
||
|
|
discussion::
|
||
|
|
code::
|
||
|
|
// example:
|
||
|
|
pi
|
||
|
|
pi.asStringPrec(3)
|
||
|
|
pi.asStringPrec(6)
|
||
|
|
(pi * 0.0001).asStringPrec(3)
|
||
|
|
7.4.asStringPrec(5)
|
||
|
|
7.4.asStringPrec(50)
|
||
|
|
::
|