转换seq< string>到F#中的string [] [英] Converting seq<string> to string[] in F#

问题描述

这篇文章中的示例有一个示例

open System.IO

let lines = 
  File.ReadAllLines("tclscript.do")
  |> Seq.map (fun line ->
      let newLine = line.Replace("{", "{{").Replace("}", "}}")
      newLine )

File.WriteAllLines("tclscript.txt", lines)

在编译时出现错误.

error FS0001: This expression was expected to have type
    string []    
but here has type
    seq<string> 

如何将seq转换为string []以删除此错误消息?

How to convert seq to string[] to remove this error message?

推荐答案

基于Jaime的答案，由于ReadAllLines()返回一个数组，因此只需使用Array.map而不是Seq.map

Building on Jaime's answer, since ReadAllLines() returns an array, just use Array.map instead of Seq.map

open System.IO

let lines = 
  File.ReadAllLines("tclscript.do")
  |> Array.map (fun line ->
      let newLine = line.Replace("{", "{{").Replace("}", "}}")
      newLine )

File.WriteAllLines("tclscript.txt", lines)

这篇关于转换seq< string>到F#中的string []的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！