How do I convert a string with a dollar amount such as "5.32" or "100" to an integer amount in cents such as 532 or 10000?
I have a solution below:
dollar_amount_string = "5.32"
dollar_amount_bigdecimal = BigDecimal.new(dollar_amount_string)
cents_amount_bigdecimal = dollar_amount_bigdecimal * BigDecimal.new(100)
cents_amount_int = cents_amount_bigdecimal.to_i
but it seems wonky. I want to be sure because this will be an input to the PayPal API.
I've also tried the money gem, but it wasn't able to take strings as inputs.
You can use String#to_r ("to rational") to avoid round-off error.
def dollars_to_cents(dollars)
(100 * dollars.to_r).to_i
end
dollars_to_cents("12")
#=> 1200
dollars_to_cents("10.25")
#=> 1025
dollars_to_cents("-10.25")
#=> -1025
dollars_to_cents("-0")
#=> 0
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