Class: Float

Inherits:
Object show all
Defined in:
lib/roebe/core/float.rb

Overview

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Instance Method Summary collapse

Instance Method Details

#ceil_to(x) ⇒ Object

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ceil_to

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# File 'lib/roebe/core/float.rb', line 62

def ceil_to(x)
  (self * 10 ** x).ceil.to_f / 10 ** x
end

#floor_to(x) ⇒ Object

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floor_to

155555.123456.floor_to(2) # => 155555.12

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# File 'lib/roebe/core/float.rb', line 71

def floor_to(x)
  (self * 10 ** x).floor.to_f / 10 ** x
end

#round_to(n = 1) ⇒ Object

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round_to

This method will round to specified positions. Defaults to 1.

num = 138.249; num.round_to(2) # => 138.25 num = 255.550505050555555; num.round_to(5)

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# File 'lib/roebe/core/float.rb', line 55

def round_to(n = 1)
  (self * 10 ** n).round.to_f / 10 ** n
end

#to_celsius ⇒ Object

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to_celsius

Convert from “Fahrenheit” to “Celsius”.

Celsius = (Fahrenheit - 32) * 5/9

68.to_celsius # => 20.0

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# File 'lib/roebe/core/float.rb', line 42

def to_celsius
  celsius = 5 / 9 * (self - 32.to_f)
  return celsius 
end

#to_fahrenheit ⇒ Object

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to_fahrenheit

“Convert” to fahrenheit.

Invocation examples:

20.to_fahrenheit
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# File 'lib/roebe/core/float.rb', line 29

def to_fahrenheit
  fahrenheit = ( self * 9 / 5 ) + 32
  return fahrenheit
end

#±(i) ⇒ Object

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±

Usage example:

7.52 ± 0.0752
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# File 'lib/roebe/core/float.rb', line 15

def ±(i)
  [(self-i).round(4), (self+i).round(4)]
end