Hello, all! I need to create objects like this data Object = MyObject { param1, param2, param3 :: String } from the input file param_1_param1=value11 param_2_param1=value21 param_2_param2=value22 param_1_param3=value13 param_2_param3=value23 param_1_param2=value12 so general pattern of recognizing parameter name and value is param_{id}_{property name}={property value} so I need to create function
parseDataFile :: [String] -> [Object]
For now I can think on splitting the task into 2 functions
groupSameObjectParameters :: [String] -> [[String]]
which will group the lines with same id into a list, and then apply function
createObject :: [String] -> Object
so overall solution will be
parseDataFile :: [String] -> [Object] parseDataFile = map createObject . groupSameObjectParameters
however I have no neat idea about how to create instance of MyObject - I need to supply all of parameters to the constructor at once. Also I don't like the idea of rearranging list first and then create objects from another list, because the list can be relatively large. In imperative programming with mutable objects I would create an array, then for each line get the id and try to find if there is the object in the array at 'id' index. If no - create one. Then set appropriate property from value. Is it possible to do something similar in Haskell? Thank you in advance! -- Eugene N Dzhurinsky