hjmtql / purescript-record-csv

CSV parser and printer for PureScript's record.

purescript-record-csv

CSV parser and printer for PureScript's record.

type Person =
    { name :: String
    , age :: Int
    , married :: Boolean
    }

parsePerson :: String -> CSVResult (List Person)
parsePerson = parseCSV

printPerson :: List Person -> String
printPerson = printCSV

Parser Example

String value must require double quotations. It is good to avoid troublesome (Maybe String, escape character).

Type	Example
String	"hello","","Say \"hi\".",...
Int	1,0,-1,...
Number	-1.2,1,1.2e3,...
Boolean	true,false
Maybe String	"hello",,...

Column Order

※ PureScript row type has no order, so it will be automatically treated as alphabetical order.

To specify the column order when printing, write code like below.

type Order
    = "name"
    : "age"
    ! "married"

ord :: SLProxy Order
ord = SLProxy

printPersonWithOrder :: List Person -> String
printPersonWithOrder = printCSVWithOrder ord

Custom Type

Define instances of FromCSV and ToCSV to use custom types.

For example, sum type is as test/CustomType.purs.