Map Text.append over a list but with the arguments from the list first in Haskell?-CodePudding

Basically, I have a list ["apple", "banana"] and I want to append "|4" to each argument in the list, so that I end up with ["apple|4", "banana|4"].

I can do map (Text.append "|4") ["apple", "banana"], but that appends in the wrong order, i.e. the result is ["|4apple", "|4banana"].

Is there a good way to tell Text.append to go in the other direction in this map?

CodePudding user response：

There are a couple ways to do this. One way is to use flip:

map (flip Text.append "|4") ["apple", "banana"]

You could also explicitly use a lambda:

map (\t -> Text.append t "|4") ["apple", "banana"]

Or use the backtick infix operator syntax:

map (`Text.append` "|4") ["apple", "banana"]

CodePudding user response：

Oh actually I think something like:

[Text.append x "|4" | x <- ["apple", "banana"]]

(Posting in case this is useful for anyone in the future).