Ruby:计算浮点数中的数字

Question

是否有任何有价值的Ruby方法来计算浮点数的位数？另外,如何指定to_s浮点数的精确时间？

Answer 1

# Number of digits

12345.23.to_s.split("").size -1 #=> 7

# The precious part

("." + 12345.23.to_s.split(".")[1]).to_f #=> .023

# I would rather used 
# 12345.23 - 12345.23.to_i 
# but this gives 0.22999999999563