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nashirox/decimal_point.rb

Last active November 19, 2021 01:05
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小数点以下の桁数を取得
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decimal_point.rb
def digits_after_decimal_point(val)
return unless val.is_a?(Numeric)
digits = 0
while(val != val.to_i)
digits += 1
val *= 10
end
digits
end
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sample

list = [1.0, 1.1, 1000000000.1, 1.0000000001]
#=> [1.0, 1.1, 1000000000.1, 1.0000000001]
list.map { |i| digits_after_decimal_point(i) }
#=> [0, 1, 1, 10]

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