match allows you to see if the letters of your query match within a bigger string.

match "poo" "Poo" --> True


match "poo" "Police" --> False


match "poo" "Please be polite Online!" --> True

filter will filter an arbitrary list of objects given a function that converts the object to value you want to match on

let
    languages =
        [ { name = "Elm" }
        , { name = "Ruby" }
        , { name = "Rust" }
        , { name = "Haskell" }
        , { name = "javascript" }
        , { name = "English" }
        ]
in
    filter .name "el" languages
--> [ { name = "Elm" }
--> , { name = "Haskell"}
--> , { name = "English"}
--> ]

root strips a word down to just the lower case version of itself without any punctuation or spacing. Digits are retained.

root "Wow, I'm excited!!!!" --> "wowimexcited"


root "I'm excited 2!" --> "imexcited2"