Module: Lexdrill::Rand

Defined in:
lib/lexdrill/rand.rb

Overview

Global "how often to actually show a word" setting, applied by drill next itself (both automatic hook-triggered calls and manual invocations respect it equally). Lives at ~/.drill.rand as a plain integer; defaults to 1 (show every time).

Constant Summary collapse

PATH = 
File.join(Dir.home, ".drill.rand")
DEFAULT = 
1

Class Method Summary collapse

Class Method Details

.set(denominator) ⇒ Object 



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# File 'lib/lexdrill/rand.rb', line 18

def self.set(denominator)
  File.write(PATH, denominator.to_s)
end

.skip? ⇒ Boolean

True with probability (n-1)/n: "skip this show".

Returns:

  • (Boolean) 


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# File 'lib/lexdrill/rand.rb', line 23

def self.skip?
  denominator = value
  return false if denominator <= 1

  Kernel.rand(denominator) != 0
end

.value ⇒ Object 



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# File 'lib/lexdrill/rand.rb', line 11

def self.value
  return DEFAULT unless File.exist?(PATH)

  denominator = File.read(PATH).strip.to_i
  denominator.positive? ? denominator : DEFAULT
end