Smalltalk：将输出写入文件 [英] Smalltalk: Writing output to a file

问题描述

 脚本显示：
  

如何将输出写入文件？

解决方案

您要使用FileStream

请参阅此链接描述FileStreams

以下摘录：

FileStream
FileStreams支持所有的ExternalStreams协议。可以创建它们来读取，写入，读取或附加文件。
创建：

  *用于阅读：
 
 aStream：= FileStream readonlyFileNamed：aFilenameString 
 
 *读取/写入现有文件：
 
 aStream：= FileStream oldFileNamed：aFilenameString 
 
 *创建一个新的写入文件：
 
 aStream：= FileStream newFileNamed：aFilenameString 
  

以上是内部低级别实例创造协议，这在政治上是不正确的使用。为便于携带，请使用伴侣类Filename创建fileStreams：

  *阅读：
 
 aStream ：= aFilenameString asFilename readStream 
 
 *读取/写入现有文件：
 $ b a b：aFilenameString asFilename readWriteStream 
 
 *创建一个新文件用于写入：
 
 aStream：= aFilenameString asFilename writeStream 
 
 *追加到现有文件中：
 
 aStream：= aFilenameString asFilename appendingWriteStream 
  

Usually with my output I am writing it to the Transcript with...

Transcript show:

How does one write the output to a file instead?

解决方案

You want to use a FileStream

See this link describing FileStreams

Excerpt below:

---

FileStream FileStreams support all of ExternalStreams protocol. They can be created to read, write, readWrite or append from/to a file. Creation:

* for reading:

      aStream := FileStream readonlyFileNamed:aFilenameString

* to read/write an existing file:

      aStream := FileStream oldFileNamed:aFilenameString

* to create a new file for writing:

      aStream := FileStream newFileNamed:aFilenameString

The above was the internal low level instance creation protocol, which is somewhat politically incorrect to use. For portability, please use the companion class Filename to create fileStreams:

* for reading:

      aStream := aFilenameString asFilename readStream

* to read/write an existing file:

      aStream := aFilenameString asFilename readWriteStream

* to create a new file for writing:

      aStream := aFilenameString asFilename writeStream

* to append to an existing file:

      aStream := aFilenameString asFilename appendingWriteStream

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