Book Image

Haskell Data Analysis cookbook

By : Nishant Shukla
Book Image

Haskell Data Analysis cookbook

By: Nishant Shukla

Overview of this book

Step-by-step recipes filled with practical code samples and engaging examples demonstrate Haskell in practice, and then the concepts behind the code. This book shows functional developers and analysts how to leverage their existing knowledge of Haskell specifically for high-quality data analysis. A good understanding of data sets and functional programming is assumed.
Table of Contents (14 chapters)
13
Index

Searching for a substring using Data.ByteString

There are many algorithms to search for a string within another string. This recipe will use an existing breakSubstring function in the Data.ByteString library to do most of the heavy lifting.

The ByteString documentation establishes its merits by declaring the following claim:

"[A ByteString is] a time- and space-efficient implementation of byte vectors using packed Word8 arrays, suitable for high performance use, both in terms of large data quantities, or high speed requirements. Byte vectors are encoded as strict Word8 arrays of bytes, held in a ForeignPtr, and can be passed between C and Haskell with little effort."

More information and documentation can be obtained on the package web page at http://hackage.haskell.org/package/bytestring/docs/Data-ByteString.html.

How to do it...

  1. Import the breakSubstring function as well as the Data.ByteString.Char8 package as follows:
    import Data.ByteString (breakSubstring)
    import qualified Data...