小编Tom*_*bus的帖子

我正在为命名实体识别标记文本数据集。考虑以下示例：

{team:Alfreton Town} manager {manager:Nicky Law} says his players deserve huge credit for the character they have shown in their {league:Blue Square Bet Premier} relegation fight.

我必须找到各种类型的所有实体，并将它们添加到类别前缀和后缀中。我想做的是预定义几个快捷方式，例如：

• Meta + T将选定的文本替换$s为{team:$s}
• Meta + P将选定的文本替换$s为{player:$s}

我对 VScode 扩展不是很熟悉。是否有一些插件可以允许定义此类替换？

我正在尝试实现一个将字符串转换为Maybe Ints列表的函数,例如readInts "1 2 42 foo" = [Just 1,Just 2,Just 42,Nothing].

我的第一个方法是:

readInts (s::String) = do {
    ws <- words s;
    return (map (readMaybe::(String -> Maybe Int)) ws)
}

这导致以下错误:

lab_monad.hs:20:52:
    Couldn't match type ‘Char’ with ‘[Char]’
    Expected type: [String]
      Actual type: String
    In the second argument of ‘map’, namely ‘ws’
    In the first argument of ‘return’, namely
      ‘(map (readMaybe :: String -> Maybe Int) ws)’
Failed, modules loaded: none.

我接下来(和工作)尝试的是:

readInts (s::String) = do {
    let ws …