Useful data is often interspersed between delimiters, such as commas or spaces, making string splitting vital for most data analysis tasks.
Create an input.txt file similar to the following one:
$ cat input.txt first line second line words are split by space comma,separated,values or any delimiter you want
Install the split package using Cabal as follows:
$ cabal install split
The only function we will need is
splitOn, which is imported as follows:import Data.List.Split (splitOn)
First we split the string into lines, as shown in the following code snippet:
main = do input <- readFile "input.txt" let ls = lines input print $ ls
The lines are printed in a list as follows:
[ "first line","second line" , "words are split by space" , "comma,separated,values" , "or any delimiter you want"]
Next, we separate a string on spaces as follows:
let ws = words $ ls !! 2 print ws