Smalltalk：将输出写入文件

Question

通常我的输出我用它写成Transcript ...

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如何将输出写入文件？

Answer 1

您想使用FileStream

见this link describing FileStreams

摘录如下：

---

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

以上是内部低级实例创建协议，在使用上有点政治上不正确。为了便于携带，请使用配套类Filename来创建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

Answer 2

| fileName aStream |

fileName := (Filename named: 'stream.st').

aStream := fileName readAppendStream.

aStream nextPutAll: 'What is the best class I have ever taken?'.

aStream cr.

aStream flush.

aStream nextPutAll: 'It is the VisualWorks Intro class!'.

aStream close.

Answer 3

然后当然不要忘记处理你想要的字符编码，如果你不是写二进制或默认编码。在Pharo / Squeak中，将转换器设置为所需的TextConverter子类。