| Copyright | (c) 2011 MailRank Inc. |
|---|---|
| License | BSD-style |
| Maintainer | bos@serpentine.com |
| Stability | experimental |
| Portability | GHC |
| Safe Haskell | None |
| Language | Haskell98 |
Data.Double.Conversion.ByteString
Description
Fast, efficient support for converting between double precision floating point values and text.
Although about 15 times faster than plain show, these functions
are slower than their Text counterparts, at roughly half the
speed. (This seems to be due to the cost of allocating
ByteString values via malloc.)
Synopsis
- toExponential :: Int -> Double -> ByteString
- toFixed :: Int -> Double -> ByteString
- toPrecision :: Int -> Double -> ByteString
- toShortest :: Double -> ByteString
Documentation
toExponential :: Int -> Double -> ByteString Source #
Compute a representation in exponential format with the requested number of digits after the decimal point. The last emitted digit is rounded. If -1 digits are requested, then the shortest exponential representation is computed.
toFixed :: Int -> Double -> ByteString Source #
Compute a decimal representation with a fixed number of digits after the decimal point. The last emitted digit is rounded.
toPrecision :: Int -> Double -> ByteString Source #
Compute precision leading digits of the given value either in
exponential or decimal format. The last computed digit is rounded.
toShortest :: Double -> ByteString Source #
Compute the shortest string of digits that correctly represent the input number.