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precision 

        # BigDecimal.precision

(from ruby core)
---
    precision -> integer

---

Returns the number of decimal digits in `self`:

    BigDecimal("0").precision         # => 0
    BigDecimal("1").precision         # => 1
    BigDecimal("1.1").precision       # => 2
    BigDecimal("3.1415").precision    # => 5
    BigDecimal("-1e20").precision     # => 21
    BigDecimal("1e-20").precision     # => 20
    BigDecimal("Infinity").precision  # => 0
    BigDecimal("-Infinity").precision # => 0
    BigDecimal("NaN").precision       # => 0

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.