If you sure "z" is the last element of A you can use

init A ++ B

if it's somwhere in the middle consider

cocat $ map f A
  where
    f x
      | x == "z" = B
      | otherwise = [x]

On Sat, Nov 4, 2017 at 2:41 PM, Денис Мирзоев <nolane16@gmail.com> wrote:

If you sure "z" is the last element of A you can use

init A ++ B

if it's somwhere in the middle consider

cocat $ map f A
  where
    f x
      | x == "z" = B
      | otherwise = [x]

On Sat, Nov 4, 2017 at 1:57 PM, FlyingSheep <flyingsheep@qq.com> wrote:

(take 2 A) ++ B

 

------------------

李 鹏
四川大学计算机学院

 

------------------ 原始邮件 ------------------

发件人: "mirone"<saul-mirone@qq.com>;

发送时间: 2017年11月4日(星期六) 晚上6:48

收件人: "haskell-cafe"<haskell-cafe@haskell.org>;

主题: [Haskell-cafe] Replace list item with list.

Hello everyone!

If I have a list A : ["x", "y", "z"]

and a list B: ["f", "g"].

Here is my question:

What's the simplest way to replace "z" in the list A by list B, and get ["x", "y", "f", "g"] ?

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