On Feb 5, 2008 2:28 AM, Bulat Ziganshin <bulat.ziganshin@gmail.com> wrote:
this principle allows to build programs in quick and easy way: we just add to objects implementations of all the methods required:
e = new Entry {label := "Hi", color := blue, getValue := getEntryValue, setValue := setEntryValue}
e.display -- uses color/label properties e.saveToFile -- uses getValue property
I'm new to all this -- I can't figure out why we want to put methods inside of records. Why don't we define a module instead? module EntryModule where data Entry = Entry String Color display (Entry s c) = do someIOMagic saveToFile (Entry s c) = do someOtherIOMagic If we want a more generic approach -- where a function excepts one of many kinds of data -- than is a type class not suitable? -- _jsn